should i get an i5 2500k or amd fx 8120 8 core??

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infoiltrator

Senior member
Feb 9, 2011
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For my purposes and money the Sandy Bridge is a better fit for me.
If I was building an unpurposed project a $200 MicroCenter would appeal to me. If I had access to a microcenter.
Arguing the fine points with irrational people is its own project.
I see no reason to buy FX over Sandy Bridge.
I see no reason anyone else has to agree with my entirely rational assessment.
There is enough performance that living with the "bad" choice shouldn't bother anyone beyond a "coulda done better".
Build and enjoy.
 

Puppies04

Diamond Member
Apr 25, 2011
5,909
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About 3 ,I forgot to add "manufacturing" to "cost" , sorry.....

As for the majority of tasks , well , what tasks do my PC has to do ?...
Very few , i.e , browsing the net , some video and sound by here and there...

No task is perfs demanding except my eletronic circuits simulator wich require
the most powerfull possible FPUs...

Gratz you are probably better off with a bulldozer chip (unless you are willing to get your wallet out and spend a little extra on a 2600K which has superior FPU performance compared to the FX8150). There I said it, and guess what.... next time someone comes along and says that I will point out the power usage difference and if they don't mind I will still tell them a bulldozer is a valid choice of CPU. For the other 99.8% of people out there SB is and will continue to be the better choice until IB comes along and shakes things up again.

Still saying exactly the same thing BTW. Unless you use a very specific set of applications that enable BD to use all its cores effectivly and also are on a set budget (to the point a 2600K is too expensive) then SB is the only real informed option.
 

Rvenger

Elite Member <br> Super Moderator <br> Video Cards
Apr 6, 2004
6,283
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IVB really won't shake anything up. Haswell very well may.

Trinity might shake Intel up a bit though in the iGPU sector.
 
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blckgrffn

Diamond Member
May 1, 2003
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www.teamjuchems.com
You're stubborn and clearly don't respond to well thought out arguments, so this may be my last reply to you.

Finally! :p

Some of your numbers don't make sense. I won't get into all of them, but...

It's not $200 vs $220. I rather painstakingly, and mistakenly, took the time to lay that out.

i5 vs FX MT throughput? 1 to .85? Is that 4x1 vs 8 x .85 or what? I would think so... and probably more like 8 x .7 or worse.. which still makes its MT throughput not look quite so horrible. Unless you're saying that an i5 core has (more than) twice the IPC of a BD thread? I haven't seen it be that bad in practice in DC projects. Recently in Prime Grid when the SB had AVX in play that was true, however. ~900 Seconds for an i5 2500k to finish a WU versus ~2100 seconds on an 8120. As you have said yourself, AVX being broadly implemented soon is unlikely :) A well written one should work for BD too, which was not the case during this last race.

But enough with all that already, we obviously approach these things from different angles.

What I am seeing is that for $200 I see a nice motherboard (which I value) paired with a current CPU that has reasonable performance across a variety of scenarios. $200 happens to about my minimum for what I want to see someone spend on a new PC motherboard/cpu combo.

As discussed previously ad nauseum, and I'll not continue to debate it (and the point I am trying to make is AMD vs AMD and less AMD versus Intel), AMD has not been an ideal choice for a while.

But if it came down to someone wanting a $400-$500 build, I would consider the Bulldozer deal at Microcenter. If that $40-$80 savings meant they could upgrade their case, power supply, video card or somehow work in an SSD I would take it in a minute. Like I said, getting that slightly nicer than budget motherboard has value to me. It's hard to get an i3 with a nice board for $200, although you could do it at MC. I'd likely consider what they mainly used the PC for, if it was gaming heavy I would more seriously consider the i3 over the FX - and we can all agree that is sad for the FX.

I just recently did an i3 2100 build, a 2500k build and a 2600k build for others because it made sense for them at the price points and priorities they had. (Cheap gaming only, wanted a nice PC in the ~$600 range, and a guy who builds a PC every five years.) My sister called me up and wanted a PC for $250, max. I bought a 960t from Microcenter, unlocked it, and now she has a reasonable PC that has a 960t, 880G graphics and 8GB DDR3 for $250. I tried working an i3 in there and just couldn't make it work. Against a celeron or pentium dual core I decided the x6 had the edge.

At a certain price point, BD has a place and it is nearing it. With the demise of Phenom II, it may be that or an i3 or lower if you want new mobo/CPU under $200 and that's the unfortunate reality of the situation. Saying only idiots buy BD is what puts my back up, I don't agree with you and it is likely neither of us will change our mind.

For those with AMD brand preference (they exist!) you can make a car (truck) analogy and I will. They could by a Ford w/EcoBoost and superior power, towing and mileage. They buy the Chevy/Dodge/Tundra anyway. I have friends like this, and at least AMD is pricing their chips closer to the reality of their performance. To them, I would mention this deal as well.

Last, link to the 1045t vs 6100 article? The last I had looked, it seemed like most people were happy to forget that they existed. With Thuban drying up and their prices having dropped significantly it seems like I need to better know how that is shaking out. The last article I had read pitted the 4100 vs the i3 2100 and it didn't get bloodied as bad as I might have imagined. Pretty much it was gaming better on the i3 and wash outside of that.


For my purposes and money the Sandy Bridge is a better fit for me.
If I was building an unpurposed project a $200 MicroCenter would appeal to me. If I had access to a microcenter.
Arguing the fine points with irrational people is its own project.
I see no reason to buy FX over Sandy Bridge.
I see no reason anyone else has to agree with my entirely rational assessment.
There is enough performance that living with the "bad" choice shouldn't bother anyone beyond a "coulda done better".
Build and enjoy.

Well said :)

Linkage to our DC subforum for admittedly "unscientific" results in Thuban vs BD:

http://forums.anandtech.com/showthread.php?t=2223821&page=2
 
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Pcgeek09

Junior Member
Feb 9, 2012
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I just want something that will last a long time. Although, i heard that the FX is getting a major driver update in march and its full power will be unleashed. Its what i heard from AMD 2 months ago.
 

blckgrffn

Diamond Member
May 1, 2003
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www.teamjuchems.com
I just want something that will last a long time. Although, i heard that the FX is getting a major driver update in march and its full power will be unleashed. Its what i heard from AMD 2 months ago.

:colbert:

I think this thread has enough good information to help you out. If you have the money, go with the i5 or i7. If you are scrapping for money, consider, however briefly, BD.

There will be very little help from the patch or windows 8 (an optimistic 5% isn't closing the gap sufficiently - UNLEASHED!!!) The higher thread count might buy your system an extra year or two of relevance versus "settling" for an i3 or lesser SB based chip.
 
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LOL_Wut_Axel

Diamond Member
Mar 26, 2011
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Finally! :p

Some of your numbers don't make sense. I won't get into all of them, but...

It's not $200 vs $220. I rather painstakingly, and mistakenly, took the time to lay that out.

Yes, yes it is. Deals don't count; they're not normal price. There's a reason why they're called "a special" or "a deal". They last a limited amount of time, and are at many times unavailable for the vast majority of people.

i5 vs FX MT throughput? 1 to .85? Is that 4x1 vs 8 x .85 or what? I would think so... and probably more like 8 x .7 or worse.. which still makes its MT throughput not look quite so horrible. Unless you're saying that an i5 core has (more than) twice the IPC of a BD thread? I haven't seen it be that bad in practice in DC projects. Recently in Prime Grid when the SB had AVX in play that was true, however. ~900 Seconds for an i5 2500k to finish a WU versus ~2100 seconds on an 8120. As you have said yourself, AVX being broadly implemented soon is unlikely :) A well written one should work for BD too, which was not the case during this last race.

efficiency_multi-runtime.png


http://www.tomshardware.com/reviews/sandy-bridge-e-efficiency-core-i7-3960x,3075.html

Do the conversion to get them at the same clock speed. i5 is slightly faster. 8 cores won't do you much good if each of them are almost 60% slower and taking into account core scaling decreases as you add cores.

But enough with all that already, we obviously approach these things from different angles.

What I am seeing is that for $200 I see a nice motherboard (which I value) paired with a current CPU that has reasonable performance across a variety of scenarios. $200 happens to about my minimum for what I want to see someone spend on a new PC motherboard/cpu combo.

It's a *deal*, not a normal price. Get that through your head and maybe you'll finally understand. Not everyone (almost no one, as a matter of fact) lives near a MicroCenter. For 95% of enthusiasts, it's $200 vs $220. I don't care about your *particular* situation, just like I don't take Balla seriously when he's raving about his GTX 470s that he got cheap on some deals. I don't take kindly to people mentioning after rebate as if it were upfront price, either. Others forget to mention shipping, too.

As discussed previously ad nauseum, and I'll not continue to debate it (and the point I am trying to make is AMD vs AMD and less AMD versus Intel), AMD has not been an ideal choice for a while.

But if it came down to someone wanting a $400-$500 build, I would consider the Bulldozer deal at Microcenter. If that $40-$80 savings meant they could upgrade their case, power supply, video card or somehow work in an SSD I would take it in a minute. Like I said, getting that slightly nicer than budget motherboard has value to me. It's hard to get an i3 with a nice board for $200, although you could do it at MC. I'd likely consider what they mainly used the PC for, if it was gaming heavy I would more seriously consider the i3 over the FX - and we can all agree that is sad for the FX.

Obviously, the same thing again. It's a deal, not a normal price.

I just recently did an i3 2100 build, a 2500k build and a 2600k build for others because it made sense for them at the price points and priorities they had. (Cheap gaming only, wanted a nice PC in the ~$600 range, and a guy who builds a PC every five years.) My sister called me up and wanted a PC for $250, max. I bought a 960t from Microcenter, unlocked it, and now she has a reasonable PC that has a 960t, 880G graphics and 8GB DDR3 for $250. I tried working an i3 in there and just couldn't make it work. Against a celeron or pentium dual core I decided the x6 had the edge.

Phenom II X6=decent. No one has said otherwise.

At a certain price point, BD has a place and it is nearing it. With the demise of Phenom II, it may be that or an i3 or lower if you want new mobo/CPU under $200 and that's the unfortunate reality of the situation. Saying only idiots buy BD is what puts my back up, I don't agree with you and it is likely neither of us will change our mind.

Except you forgot that's a sale, a deal; not a normal price. Also, you need to have a MicroCenter near you by obligation. The FX-8120 costs $200. If you can find it for half the price on rare occassion, good. To say that's *the* price of it is completely disingenuous, however.

For those with AMD brand preference (they exist!) you can make a car (truck) analogy and I will. They could by a Ford w/EcoBoost and superior power, towing and mileage. They buy the Chevy/Dodge/Tundra anyway. I have friends like this, and at least AMD is pricing their chips closer to the reality of their performance. To them, I would mention this deal as well.

I don't care about brand preference. I'm not loyal to any company. I buy what's best for the price and that's that. Companies want your money, and that's alright, but mine is going to who can do the best things for my budget. If I were shopping right now I'd go for another Intel CPU and probably an AMD GPU. NVIDIA's only good cards for the money are the GTX 560 Ti and the GTX 570.

Last, link to the 1045t vs 6100 article? The last I had looked, it seemed like most people were happy to forget that they existed. With Thuban drying up and their prices having dropped significantly it seems like I need to better know how that is shaking out. The last article I had read pitted the 4100 vs the i3 2100 and it didn't get bloodied as bad as I might have imagined. Pretty much it was gaming better on the i3 and wash outside of that.

There's no articles pitting one against the other because the 1045T wasn't sampled to reviewers. There's results for the 1055T and 6100, though.

Cinebench 11.5:
1055T: 5.02 points
6100: 3.34 points

HandBrake:
1055T: 16.59FPS
6100: 13.73 FPS

If you want more benches you'll have to look deeper since they're not pitted against each other. However, the only scenario where the 6100 is faster is Photoshop and WinRAR.

Also, most reviews featuring the FX-4100 showed it being solidly beaten. No idea where you got "the same apart from gaming". Both the Core i3 and Phenom II X4 are faster on average.



Well said :)

Linkage to our DC subforum for admittedly "unscientific" results in Thuban vs BD:

http://forums.anandtech.com/showthread.php?t=2223821&page=2

Bold.
 

blckgrffn

Diamond Member
May 1, 2003
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www.teamjuchems.com

Hah. So this whole time, you've been talking about not MC deal, and I've been talking about the MC deal? You know, the one you can get NCIX to match online. Jeeze.

I don't give a crap that you don't live near MC and can't get those prices. That is not my problem. These are the prices for me and everyone I help build PCs for, so they are my reality.

I have, however, offered to help people get a bundle in the past and I think I need to get a 960t for someone yet if they are still interested.

So, you know, if you aren't a jerk and *know* someone that lives near MC/Fry's/Comp USA wherever, you can get these deals. Especially on a forum like this one.

/my involvement in the thread.

Except to say that my L2 cacheless celeron @ 300 mhz from 1998 would wank that Pentium Pro. I'm sure of it :D
 

LOL_Wut_Axel

Diamond Member
Mar 26, 2011
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Hah. So this whole time, you've been talking about not MC deal, and I've been talking about the MC deal? You know, the one you can get NCIX to match online. Jeeze.

I don't give a crap that you don't live near MC and can't get those prices. That is not my problem. These are the prices for me and everyone I help build PCs for, so they are my reality.

I have, however, offered to help people get a bundle in the past and I think I need to get a 960t for someone yet if they are still interested.

So, you know, if you aren't a jerk and *know* someone that lives near MC/Fry's/Comp USA wherever, you can get these deals. Especially on a forum like this one.

/my involvement in the thread.

Except to say that my L2 cacheless celeron @ 300 mhz from 1998 would wank that Pentium Pro. I'm sure of it :D

For a week or two, maybe. But the normal price is $200. For $100 it's decent if you want something dedicated for encoding only. As always, undervolting is recommended due to high leakage.

And a reply to your second paragraph: your reality is 5% of the enthusiast community. If anything, it's me and everyone else that shouldn't care about it. Just like I don't care for people raving about Black Friday deals :)whiste:). Almost no one here has a MicroCenter near them, and almost no one is looking to buy hardware specifically on this week or the next.
 

billbobaggins87

Senior member
Jan 9, 2012
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Which one has better core efficiency?


3 posts on these Forums and they all consist of this thread.
I strongly advise you do READ. It can do wonders.. and not just forums.

pcgeek. first things first..
1) look into how much you want to spend
2) what you currently have to work with
3) Lastly what you are looking to do.(regular use/ gaming/ graphic art)


Regardless of the bashing and all of that those three points will pinpoint what you want/need. then READ.. i cant stress this enough. Don't go and read what info people find... find it yourself. Look into who is posting the findings and what their backings are. Get a feel for how things are going not how people can argue.

I would think that the members of this forums with well in the multiple thousands of posts would be abit more supportive than the AMD vrs INT war that i was just skimming through

. Lets see people support and help instead of a bashing war..

Best of luck
 

blckgrffn

Diamond Member
May 1, 2003
9,679
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www.teamjuchems.com
3 posts on these Forums and they all consist of this thread.
I strongly advise you do READ. It can do wonders.. and not just forums.

pcgeek. first things first..
1) look into how much you want to spend
2) what you currently have to work with
3) Lastly what you are looking to do.(regular use/ gaming/ graphic art)


Regardless of the bashing and all of that those three points will pinpoint what you want/need. then READ.. i cant stress this enough. Don't go and read what info people find... find it yourself. Look into who is posting the findings and what their backings are. Get a feel for how things are going not how people can argue.

I would think that the members of this forums with well in the multiple thousands of posts would be abit more supportive than the AMD vrs INT war that i was just skimming through

. Lets see people support and help instead of a bashing war..

Best of luck

nvm
 
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skipsneeky2

Diamond Member
May 21, 2011
5,035
1
71
3 posts on these Forums and they all consist of this thread.
I strongly advise you do READ. It can do wonders.. and not just forums.

pcgeek. first things first..
1) look into how much you want to spend
2) what you currently have to work with
3) Lastly what you are looking to do.(regular use/ gaming/ graphic art)


Regardless of the bashing and all of that those three points will pinpoint what you want/need. then READ.. i cant stress this enough. Don't go and read what info people find... find it yourself. Look into who is posting the findings and what their backings are. Get a feel for how things are going not how people can argue.

I would think that the members of this forums with well in the multiple thousands of posts would be abit more supportive than the AMD vrs INT war that i was just skimming through

. Lets see people support and help instead of a bashing war..

Best of luck

+1 Hell i tried to offer my positive input on BD looking at power consumption on a core to core basis and was gentle and basically it got shot down as bullshit.

This point price is what will make the decision matter as also usage unless i am missing something,the Op did fail to mention what the pc will be used for.

2500k for gaming,8150 for heavily threaded apps if power consumption isn't his main concern and if he has deeper pockets a i7 2600k would make more sense then a 8150.
 

Chiropteran

Diamond Member
Nov 14, 2003
9,811
110
106
What I was actually pointing out (and I think you really must have some kind of agenda here to twist a quite simple point) was that in any single threaded cpu dependant application the intel offering will be a lot faster and draw less power, in any mildly threaded cpu dependant application the intel rig will still be a lot faster and draw less power and in some very highly threaded applications the intel rig will be slighly slower while drawing a hell of a lot less power.

Ah, thanks for clearing it up. Now are you just pulling this information out of your butt or do you have a source? Because the only source anyone ever seems to have for bulldozer power usage is either the ridiculous x264 HD 3.03 2nd pass test, or some even more ridiculous test with overclocking added. In either case the tests are pushing all 8 cores.

So anyway... do you actually have a source showing bulldozer using significantly more power to run single or even dual threaded loads? Note that you were claiming the incredible power usage difference would cause the bulldozer build to spec a stronger power supply, erasing the $40 price advantage, so I will need to see a 100-200W difference in power usage. Good luck finding evidence to back up your wild claims. Also, don't forget we are talking about the 8120, which uses significantly less power than the 8150.
 

JumpingJack

Member
Mar 7, 2006
61
0
0
+1 for the i5-2500K... It is a better overall chip. Better yet check several review sites (reputable ones) and they all recommend he same.
 
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JumpingJack

Member
Mar 7, 2006
61
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0
I just want something that will last a long time. Although, i heard that the FX is getting a major driver update in march and its full power will be unleashed. Its what i heard from AMD 2 months ago.

It has already been released, and it wasn't a driver, Microsoft had to patch the kernel.

http://www.custompcreview.com/2012/01/13/updated-windows-7-amd-bulldozer-2/

Or
http://www.anandtech.com/show/5448/the-bulldozer-scheduling-patch-tested

It didn't do much. The "full power" involves some reworking of thread scheduling in lightly threaded apps. Don't get our hopes up.

(btw the anand link shows an 8150 as well as a 2500k which your op was concerned, an 8120 will be slower than the 8150)
 
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Puppies04

Diamond Member
Apr 25, 2011
5,909
17
76
Ah, thanks for clearing it up. Now are you just pulling this information out of your butt or do you have a source? Because the only source anyone ever seems to have for bulldozer power usage is either the ridiculous x264 HD 3.03 2nd pass test, or some even more ridiculous test with overclocking added. In either case the tests are pushing all 8 cores.

So anyway... do you actually have a source showing bulldozer using significantly more power to run single or even dual threaded loads? Note that you were claiming the incredible power usage difference would cause the bulldozer build to spec a stronger power supply, erasing the $40 price advantage, so I will need to see a 100-200W difference in power usage. Good luck finding evidence to back up your wild claims. Also, don't forget we are talking about the 8120, which uses significantly less power than the 8150.

Yes. Yes I do actually. Have fun reading, oh and by the way unless the 8120 uses 100% less power than the 8150 then maybe you need to go have a look round the internet instead of accusing people of "pulling information out of their butt" as you so politely put it.

http://www.tomshardware.com/reviews/fx-power-consumption-efficiency,3060-12.html

Edit.

Also in what universe do PSUs go up in 100-200w steps? Also pay attention to the Wh figures. Every time you do anything with a BD you are throwing money down the drain unless you don't pay for your electricity. Not only do they take longer to perform almost all tasks they use a lot more power while doing it. totaling that difference up over 2-3 years and adding in the increased cost of a PSU and you might start to see where I get the "$40 cheaper is a misnomer" idea from.
 
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infoiltrator

Senior member
Feb 9, 2011
704
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Distinctions here are between better and best, which are not a great matter.
The differences between bad and worse are important, these do not fit the case.

That said Tomshardware has an excellent article on the FX8150 vs I7 920 vs I7 2600K and I5 2500K gaming with the HD 7970 Video Card.
Sandy Bridge has a clear 20% advantage at low resolution that diminished as resolution went up.
If this scales to lesser chips (it is architecture and features, it should) that is a big advantage for gaming from Sandy Bridge on a budget.
I have no idea if it applies only to I5 and I7 or applies to I3.

YMMV
 

bononos

Diamond Member
Aug 21, 2011
3,928
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Yes. Yes I do actually. Have fun reading, oh and by the way unless the 8120 uses 100% less power than the 8150 then maybe you need to go have a look round the internet instead of accusing people of &quot;pulling information out of their butt&quot; as you so politely put it.

http://www.tomshardware.com/reviews/fx-power-consumption-efficiency,3060-12.html
......

xbit has a review for single threaded power consumption which does have the 8120 and 2500 for comparison. The gap is a little closer than the THW, xbit's is measured at the wall without the monitor. http://www.xbitlabs.com/articles/cpu/display/amd-fx-8120-600-4100_8.html