AMD competition for Core i3 (Gamers thread)

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davidrees

Senior member
Mar 28, 2002
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This is my CPU migration over the last 3 years:

AMD 3000+
Intel Pentium (940?) 3.4Ghz
Intel E5200 (@ 3.5Ghz)
Intel i5 / 750 (not yet OC)

Every one of those upgrades led to astonishing increases in gaming performance.

I really thought my E5200 and 4850 could do well on all the games I wanted to play. It was OK in Crysis but marginal in Far Cry 2.

Now that I have the 750, I am pretty stunned at how much smoother everything is overall. Sure the core is better clock for clock, but I am still down at 500-900mhz but those extra cores are just so so nice to have.

It's only going to get more and more that way.
 

cbn

Lifer
Mar 27, 2009
12,968
221
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This is my CPU migration over the last 3 years:

AMD 3000+
Intel Pentium (940?) 3.4Ghz
Intel E5200 (@ 3.5Ghz)
Intel i5 / 750 (not yet OC)

Every one of those upgrades led to astonishing increases in gaming performance.

I really thought my E5200 and 4850 could do well on all the games I wanted to play. It was OK in Crysis but marginal in Far Cry 2.

Now that I have the 750, I am pretty stunned at how much smoother everything is overall. Sure the core is better clock for clock, but I am still down at 500-900mhz but those extra cores are just so so nice to have.

While I agree that quad core can improves things....times have changed. In the old days all desktop CPUs were single core.

Now the market is split and the same people that would have been buying fullsize desktop CPUs to surf the net and check email are using laptops.

Essentially the group of people with weaker CPUs is growing and full sized desktop CPUs are taking a back seat to this new market segment. Either that or people just won't put top of the line CPUs in their web surfing desktops anymore.

So the PC gaming market keeps shrinking for this reason and many others. Less people with capable hardware means less drive to develop extensively multi-threaded software. The upside of course is that the latest dual core CPUs will play the most advanced games just fine.

It's only going to get more and more that way.

Well Intel is pretty confident to price a dual core higher than an AMD quad core so it is obvious we haven't reached that point yet.
 
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Markfw

Moderator Emeritus, Elite Member
May 16, 2002
27,255
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snip The upside of course is that the latest dual core CPUs will play the most advanced games just fine.

Well Intel is pretty confident to price a dual core higher than an AMD quad core so it is obvious we haven't reached that point yet.

No that is NOT true. Some of the latest games are OK, but not all, and that is changing that way every day. Less and less of todays games work fine on a dual-core. Did you not read the pages of replies here ??
 

cbn

Lifer
Mar 27, 2009
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No that is NOT true. Some of the latest games are OK, but not all, and that is changing that way every day. Less and less of todays games work fine on a dual-core. Did you not read the pages of replies here ??

So I should consider Athlon II x4 a better choice than Core i3 for playing games?

Maybe I am wrong but I think the average gaming box these days shouldn't have to be expensive. Lower power CPU like this 32nm Core i3 wouldn't need much in the way of Power supply. Cooling requirements would be less also.

I bet someone could put together something pretty nice for $350 with these power efficient parts.

But if a person goes with 45nm quad core (like Core i7 860) the ventilation/cooling and PSU requirements jump up and everything else in the budget needs to be upsized to cover this. In the end the total price ends up being greater than the CPU dollar difference.
 

Fox5

Diamond Member
Jan 31, 2005
5,957
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What online FPS shooter is going to run 'not well enough' on a Cray supercomputer?

But does that mean we should all buy Cray Supercomputers now?



By the time this is implemented I'm sure octocore will be the default standard for desktop.

Besides a cutting edge dual core should have no trouble running these current four threaded programs you are talking about. I know this is true with Left 4 Dead 2.



It will be interesting to see the benchmarks comparing Intel Core i3 with hyperthreading and Athlon II x4.

I have a feeling this Core i3 will probably beat it by a good margin though.



I already know some games are featuring four threads. But that doesn't mean a dual core won't be able to play it. Total computational power matters more.

1. Your argument was that for games where a quad core does better, it doesn't matter because a dual core is 'good enough.' I just turned it around. You (or perhaps someone else) implied the multiplayer FPS games did best with dual cores, and due to their competitive nature, the added performance mattered more. However, in quite a few FPS and multiplayer games, quad cores do have the advantage, sometimes quite significantly.

2. There are already a good handful of games that make use of quad cores. More so than games that use PhysX or DirectX10 to any benefit. If you want to play every game on the market well, you need a quad core. This will only become more in favor of quad cores as time goes on, as the tipping point appears to have been reached where almost all software is developed with multicore in mind.
And remember, consoles drive game development, and the consoles are heavily multicore, so most game development doesn't have a choice of 'fast dual core' versus 'slightly slower quad core', multi-threaded development is a must.
An Athlon II X4 or Phenom II X3 are comparable in cost to high end dual cores, but will run every game on the market well. A high end dual core will not. This is true, regardless of whether you're interested in those games.

3. Hyperthreading on average adds 20% performance. The dynamics of the market won't change from how it is now, Intel dual cores will be matched against AMD triple cores. On average, they will perform the same, but on some things, the triple core will have a big advantage. If you want the worst case scenario to perform the best, you want a triple or quad core. If you want quake 3 to run as fast as it possibly can, take your dual core.

Telling me about four threaded programs doesn't count either when the latest dual core has easily handle it.

This is just wrong. GTA4, Dragon Age, ARMA2 and possibly others cannot run at 60 fps on a dual core. And there are plenty of other games where quad cores still have an advantage. Why do you only focus on software that doesn't stress cpus? There are games that run fine on the Atom cpu, does that mean we should ignore more demanding software? Why do you have such a hard-on for dual cores? If you're really about value and 'most software running well enough', you have no reason to upgrade to even the latest dual core, keep what you have until it barely functions.

Trouble is competing AMD hardware at the moment is running on a larger die size. (Phenom II die size >> Core i die size).

On top of this intel is @ 32 nm sooner which will further increase their yields per wafer.

I don't see how AMD can slash prices much longer as this is basically amounting to a battle of attrition.

It's not any worse of a situation than back in the 65nm Phenom days. Besides, what do you care about AMD's profit, I thought this was about consumer value?

I am guessing Intel will do something to these Core i3 chips to limit their overclocks so you very well just may be right.

They don't need to. The cpus aren't designed to hit high clock speeds in the first place, high speed cores haven't been the focus for years. Even if they did focus on hitting the highest core speed possible, power consumption and heat output don't increase linearly with speed, they do increase linearly with core count. As you try to push a cpu higher, power usage and heat output begin to increase exponentially. Even with water cooling and huge power supplies, cpus can't be pushed much faster than they are. Even the extreme overclocking runs, using liquid nitrogen (-196 Celcius) start approaching 0 Celcius on those 6 and 7Ghz runs. There's a very narrow frequency range in which power use scales linearly with frequency, and it becomes smaller with every process node. Eventually, there will be 0 reason to make a dual core (other than cost), they won't clock any higher than quads.

In 2005, nothing used dual cores. It seemed almost silly to buy a 2Ghz dual core when single cores (AMD) were pushing 3Ghz. By the end of 2006, those 2Ghz dual cores were still able to play the latest software, that 3Ghz single core was not. It's taking a bit longer for quad cores, but the same thing will happen. Heck, you said it yourself, only the top end dual cores are capable of playing many of the latest games well, meaning nearly the entire product line is already outdated. Just about any old quad core can hang in the latest games, even those dread awful Phenoms (the originals), but only the best representation of dual cores has a chance.

Ya I pretty much said that in a very long and winded way, it seems like the best option for AMD to counter the i3.

Well, considering Bulldozer (which has its own hyperthreading variant) doesn't come out till 2011, I'd say that's hardly a counter to i3. AMD's product lines are what they are, and they're not launching any new product for quite a while, you'll only see price reductions and small clock speed increases.

So I should consider Athlon II x4 a better choice than Core i3 for playing games?

Yes. i3 is not going to be something amazingly better than the core 2 duos it's replacing.

But if a person goes with 45nm quad core (like Core i7 860) the ventilation/cooling and PSU requirements jump up and everything else in the budget needs to be upsized to cover this. In the end the total price ends up being greater than the CPU dollar difference.

So the only options are a low end i3 and the absolute high end? There are quad cores from under $100, and only minimal increases in power supply cost will be required. Heck, if you have a high end video card, you already had to buy a more powerful power supply, and if you don't, you're not playing high end games.

You're basically arguing for everyone to get netbooks. Very low power and low cost, and if you limit the scope of the software enough, capable of playing anything you want.

You know, just go ahead and buy for i3 for $100 with minimal power supply and motherboard. Then in a year or two when you decide you need a quad core, buy a new power supply and motherboard to go with it, and a $100 quad core at that point. You'll really be saving money!
 
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cubeless

Diamond Member
Sep 17, 2001
4,295
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damn, u r tenacious...

1) it's always going to be easier to get more power by adding cores than making faster cores, so this will be the direction going forward
2) feel free to build your 'good enough', economy, system with low priced components and have a nice day...

and that x4 is very good... if you want a cheap 4 core part...
 

Fox5

Diamond Member
Jan 31, 2005
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http://www.pcgameshardware.com/aid,...ark-review-with-13-processors/Reviews/?page=2

For this game it appears total computational power is more important than the number of cores.

Notice the newer dual cores beating the older quad cores.

A 3.6Ghz dual core barely beats a 2.4Ghz quad. Great, so you need to take an overclocked dual core, beyond that of any stock dual cores, to beat one of the slowest quad cores on the market. You basically just proved my point, virtually any quad core can hang in the latest games, you need to go with a dual core that doesn't even exist on the market to beat the slowest (or close to it) quad core Intel makes.
And you know what, your non-existent 3.6Ghz stock core 2 duo still gets beat by a Phenom I.

So your options are:
Get a dual core, and overclock it to the maximum it can handle.
Get the slowest quad core available and get the same performance, stock.

BTW, the Athlon II X4 (Athlon II 620) for $100 will match the Phenom X4 9950 almost exactly. That's the Phenom that beats the 3.6Ghz imaginary dual core. And the Athlon II 620 will overclock to at least the low 3Ghz range, meaning it should outperform just about any dual core in a quad core optimized game when both are overclocked to their limit.
Also, the Athlon II X4 has a smaller die size than the core i3 @ 45nm. The core i3 still has the full compliment of L3 cache, yes? It's not going to be smaller than the Athlon II X4 then until the 32nm shrink.
You can also get a 2.6Ghz Phenom II X3 for $109 which will probably be the best gaming cpu when compared to any cpu cheaper.


If you want, you can also get a 2.7Ghz Athlon II x3 for $80 and a 2.9Ghz X3 for $90. Most games don't make much use of a 4th core at the moment, so for gaming purposes a triple at a slightly higher clock speed can beat a quad core. Even in games that benefit from triple to quad usually only get 10% to 15% boost, meaning the 2.9Ghz Athlon II X3 should at least match the Athlon II X4 in just about any game. You rarely see triple to quad core comparisons, but there's a big boost in many games from dual to triple, there's far fewer that make use of quad. Not to mention the Athlon II architecture is handicapped in multithreaded scaling due to the lack of an L3 cache, but it is cheap, and in multithreaded programs gives more total computational power than a dual core, and higher efficiency in using it too (maybe not against the i3s).

It's something like each i3 core achieves 37% of its peak performance, increase that to 45% if you include hyperthreading.
Each Athlon II core is 25% weaker, but achieves 43% of its peak performance, (I made these numbers up, but the idea should be about right), so the efficiency is about equal. But the Athlon II triple core has 12.5% more computational units, the Athlon II X4 has 50% more computational units (than the dual core i3). The triple core, if utilized well, edges out the i3, the quad core destroys it. (Phenom II even more so, it's not any stronger than the Athlon II, but achieves an efficiency even higher, but is probably too expensive to compete in the ~$100 market for long)
Of course, scaling will get worse as more threads are added, but the AMD cpus will have the advantage of higher clock speeds. i3 will start at 2.4Ghz and max out around 3Ghz, currently Athlon IIs occupy the 2.6Ghz to 2.9Ghz range, but AMD can and will adjust as necessary to compete with the i3s. The architecture is capable of at least 3.4Ghz, Intel does not plan to introduce i3s above 3Ghz (and won't to avoid cannibalizing the sales of i5s and i7s).
 

OBLAMA2009

Diamond Member
Apr 17, 2008
6,574
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why r people talking about i3--is it being released this month or something


http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=3648&p=7

According to this the Core i3 has two very fast cores (perfect for maxium performance with 99% of the games out there) while performing on par with Core 2 quad (q9400) with respect to four threaded programs.

What does AMD have planned to counter this? (in the near future)

To me this idea of having maximum performance in dual threaded games is more attractive than have medium performance spread across four cores. In fact, it makes me want to think twice about being an early adopter with respect to CPUs.

Who would have thought a future dual core would be better with four threads than a dedicated quad core like Q6600? So much for "future proofing" strategies.
 

Fox5

Diamond Member
Jan 31, 2005
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http://www.techspot.com/review/197-amd-athlon2-x4-620/page7.html

According to this review Athlon II x4 is on par with Q6600 beating it in 2 out of 3 gaming benchmarks.

The big question remains can Core i3 keep up in heavily threaded games like Arma 2? How well will the hyperthreading work in this scenario?

Hyperthreading averages a 20% boost, not enough to match even a triple core.
I'll admit games are likely to benefit more so from HT than other apps, due to low resource utilization to begin with.

The Atom sees a maximum of about 50% performance boost from hyperthreading. That's a single core and an inefficient architecture. A dual core i3 has less to gain from hyperthreading since it's already very efficient, and because scaling decreases as more threads are added. You'll see no more than 20-30% boost, at max, from hyperthreading.
 

cbn

Lifer
Mar 27, 2009
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That's the Phenom that beats the 3.6Ghz imaginary dual core.

Well the $123 Core i3 530 has a stock clock of 2933 Mhz. If we figure in a 20% IPC improvement this would give us a total power equivalent to a 3.52 Ghz Core 2 duo.

So at this point Core i3 is equivalent to a Q6600 in GTA 4. But then what happens if we add in hyperthreading? Another 10-30% boost right?

I think it is safe to say stock clocks vs stock clocks this chip could be faster than a quad core in GTA 4.

On top of that the Core i3 probably has much better overclocking headroom.
 

Fox5

Diamond Member
Jan 31, 2005
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Well the $123 Core i3 530 has a stock clock of 2933 Mhz. If we figure in a 20% IPC improvement this would give us a total power equivalent to a 3.52 Ghz Core 2 duo.

So at this point Core i3 is equivalent to a Q6600 in GTA 4. But then what happens if we add in hyperthreading? Another 10-30% boost right?

I think it is safe to say stock clocks vs stock clocks this chip could be faster than a quad core in GTA 4.

On top of that the Core i3 probably has much better overclocking headroom.

Where are you getting the 20% IPC improvement from? Core 2's often outperform i7s clock per clock in games, and in general are at least comparable, except in heavily multithreaded titles where the lack of L3 cache hurts the core 2 quads.

i7's haven't really out clocked core 2 quads either, so I doubt core i3 will overclock any better than a core 2 duo.

BTW, for the same price as that i3, you can get quad core athlon II at 2.8ghz, or a triple core phenom II at 2.8ghz.
The Phenom II is a good 20% faster than the athlon II clock per clock per core in games.

Additional, core i3 is yet to launch, so there's no pricing pressure on those athlon II's and phenom II's yet, as they handedly outperform the intel competition in that price range atm. If core i3 is too close in performance, AMD will drop prices or introduce faster models at the same price point. Very rarely does Intel ever offer a better value in the ~$100 and below price point, even with overclocking taken into account and especially without.
 

Dadofamunky

Platinum Member
Jan 4, 2005
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P55 motherboards will accept clarkdale chips just fine. Intel's already confirmed that.
And 32nm will OC better than 45nm, maybe significantly. We dont know that for sure, but if lynnfield does 4Ghz, I expect clarkdale can hit 5Ghz with 4 threads. Not too shabby.

My thought here is that I wouldn't expect that for any 32nm chip, simply because the 32nm process is SO darn small that planting a huge HSF on the die may not cool it acceptably for such high clock speeds, because the surface area coming in contact with the cooling unit is so small. That of course is what the 'lids' on the chips are supposed to help with (back in the P3 days, you didn't even buy chips with lids on them - the die was right on there in front of God and everybody, and the HSf contacted it directly). But I think that only goes so far once the chips get that tiny. Illustration: When going from a Conroe to my Wolfdale, I was surprised at how much heat the new CPU threw out after a modest OC, using the same exact cooling.

Then again, for the 32nm, obviously we will see.

It does look like the Core i3s are the chips that will replace the Wolfies.
 

Duvie

Elite Member
Feb 5, 2001
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If the GPU becomes more and more important and switchable graphics are enabled, I think a lot of people will be rethinking how many cores they need.

Something tells me the upcoming 22nm Octocore will become the Q6600 of 2011.(Only able to be fully utilized by a very small number of people using specialized applications). I hope I am wrong about this though.

Nope you are right on.....

I have had the same QX6700 since I got an ES in DEC 2006....I have found only a handful of apps that can even peg this thing and I dont do them that often.

CAD for me only uses 75-89% in rendering my final project....So pretty much 90% of the time it wouldn't feel any faster then a similar speed dual core...

HD encoding and blu-ray encoding through my Pinnacle software gets me close to full load, but I become IO dependent.

I honestly cannot justify much about a dual core right now, and that is full ease of multi-tasking which I do. Other then that I could sit on this QX6700 for likely awhile longer. Alas I am getting bored and may get an i5 or i7 to just play with ther new technology. I hear the i7 has a wicked folding work unit that gets close to 25k a day and more with bonus...
 

IntelUser2000

Elite Member
Oct 14, 2003
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Where are you getting the 20% IPC improvement from? Core 2's often outperform i7s clock per clock in games, and in general are at least comparable, except in heavily multithreaded titles where the lack of L3 cache hurts the core 2 quads.

If you go into low quality tests where its more CPU bound, i7 often outperforms Core 2 significantly: http://www.techspot.com/review/124-intel-core-i7-920-940-965/page12.html

Somehow in the high quality tests it tends to suffer: http://www.techspot.com/review/124-intel-core-i7-920-940-965/page11.html

I have a hunch it was due to the fact that in GPU-bound settings the significant platform change "confused" the code a bit. When programmers are coding they often try to optimize as best as possible for the platform they are on and its been only recently Intel platform went through a significant change aka Nehalem. Change here = QPI/3 level caches

The single thread IPC improvement is 10-15%. The multi-thread performance is significantly higher and that's where Nehalem shines. According to this review most apps are also 4 threaded, making it a perfect match for 2 cores + 2 threads/core: http://www.tomshardware.com/reviews/multi-core-cpu,2280-10.html

Most of the performance losses due to Hyperthreading is because in apps that only support less than 8 threads, there is a resource contention. Core i5 with 2 cores/4 threads won't have that. Plus, 4 threaded apps won't have that big of a loss compared to 4 core Core 2 due to the fact Hyperthreading will actually take advantage of it.

A leaked review by Hexus.net has shown a 3.06GHz Core i5(not i3 folks!) performs on par with Q8400 even in heavily multi-threaded apps like Cinebench. I'm betting it'll get better for Clarkdale by launch.
 
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cbn

Lifer
Mar 27, 2009
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My thought here is that I wouldn't expect that for any 32nm chip, simply because the 32nm process is SO darn small that planting a huge HSF on the die may not cool it acceptably for such high clock speeds, because the surface area coming in contact with the cooling unit is so small.

So you are saying the heat spreader does a poorer job of distributing the heat?

Still that wouldn't increase cooler requirements.....it just makes a really large cooler inefficient relative to the amount of material used.

In fact, I wouldn't be suprised if the stock box cooler on the Core i3 is less beefy than the one used on the 45nm Core i5 quad. I guess this depends on how hot the 45nm IGP runs.
 
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BaboonGuy

Diamond Member
Aug 24, 2002
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Not easily in a 64-bit OS which is really what I'd use. I don't even consider a 32-bit OS viable anymore.

Pretty sure the new C3 steppings work much better with Win 7 64-bit. Ofc haven't tried it myself, I still have an old 940BE, but I've seen people hit 4GHz stable in Win 7 64-bit on other forums with the C3 stepping.
 

cbn

Lifer
Mar 27, 2009
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If you are into RTS games, that is not even a question..... Absolutely!
But most of the members have already told you so....

Yeah but most RTS games don't need high frame rates to be playable (and the game developers know this)

But if I had SLI or Crossfire and the game I was playing truly used four threads then I would be go with the quad core.
 
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edplayer

Platinum Member
Sep 13, 2002
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So I should consider Athlon II x4 a better choice than Core i3 for playing games?


When the i3 is reviewed, I'm sure comparisons to the Phenom II will be around also.



I bet someone could put together something pretty nice for $350 with these power efficient parts.

But if a person goes with 45nm quad core (like Core i7 860) the ventilation/cooling and PSU requirements jump up and everything else in the budget needs to be upsized to cover this. In the end the total price ends up being greater than the CPU dollar difference.


I don't think that you will be able to put anything "pretty nice" together for $350. You can probably put something together, but you won't find [many] people here saying it is pretty nice.

The cooling and PSU requirements will go up but only slightly. Would you be looking for something that barely covers the power requirements? My computer building style is quality parts that are power efficient and well priced or on sale. Example, a psu I like to use is the Corsair 400CX. It goes on sale a lot for $30 AR. The i3 could get by with a smaller psu (but so could the i5) but which one would you get that is of equal quality (or higher if quality matters to you) for a lower price? See my point?

Same for fans, will you be looking for the ones that flow the least amount of air?
 

cbn

Lifer
Mar 27, 2009
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The cooling and PSU requirements will go up but only slightly. Would you be looking for something that barely covers the power requirements? My computer building style is quality parts that are power efficient and well priced or on sale. Example, a psu I like to use is the Corsair 400CX. It goes on sale a lot for $30 AR. The i3 could get by with a smaller psu (but so could the i5) but which one would you get that is of equal quality (or higher if quality matters to you) for a lower price? See my point?

I haven't really shopped around for small PSUs in a long time but something tells me you are right. Despite the fact that I hate the idea of rebates a 400 watt Corsair for $30 AR is a really good deal.

In fact, 400 watts can cover quite a bit provided the PSU is a quality unit.

Same for fans, will you be looking for the ones that flow the least amount of air?

The stock box cooler that comes with the Core i3 will probably give more overclocking headroom (especially with the IGP not being used) compared to stock cooler and Core i5 750 . This based on the assumption both Core i3 and Core i5 750 get the same stock cooler. However, something tells me people have no trouble getting reasonable overclocks using Core i5 quad core and factory cooling.
 
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