The next best thing?

myocardia

Diamond Member
Jun 21, 2003
9,291
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Hmmm, I wonder if the 2800's lack of overclocking potential carries over to the mobile part too, though. If it doesn't, that would definitely be an awesome chip.
 

SickBeast

Lifer
Jul 21, 2000
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Nice, but $234, that's alot to pay for a CPU, no? And is it multiplier-unlocked? If it is, sign me up. :)
 

Zebo

Elite Member
Jul 29, 2001
39,398
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If you compare to the socket A chips, espcially the mobiles, anything is a lot to pay.;)

However if you're building complete new system It ain't so bad since everything else will cost the same mem, board, video etc. and only add about $150 to the total price of a new system.

The real question is will these OC to say 2500Mhz:D

Edit: the multipliers I believe are only unlocked downwards on these chip:(
 

Alkaline5

Senior member
Jun 21, 2001
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Since there's no heatspreader, wouldn't you have to modify a heatsink to make proper contact with the core?
 

Zebo

Elite Member
Jul 29, 2001
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Originally posted by: Alkaline5
Since there's no heatspreader, wouldn't you have to modify a heatsink to make proper contact with the core?

NO? All HeatSpreader does, geometrically speaking, is give larger contact area between chip and heatsink. You apply the hestsink and the thermal compound the same way (just be more careful you don't crack the core). Contact itself is managed by a spring machanism like any other chip or socket.
 

Bar81

Banned
Mar 25, 2004
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Considering all the data showing the .13 micron process for the A64 maxes out at about 2.5Ghz on air cooling, these CPUs are not going to overclock any better than the other A64s out there although they *may* run cooler at those overclocked voltages *if* they can overclock at a lower voltage.

As to the heatsink contact, yes, it is a real concern. The heatspreader is actually quite thick and the removal of it requires that you either carefully select your heatsink (either Thermalright 948U or Alpha PAL8150T w/Alpha brand backplate) or a slight shaving of the screws so that the heatsink goes into the screw poles enough to make up for the lack of height due to the removal of the heatspreader.
 

SickBeast

Lifer
Jul 21, 2000
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Originally posted by: Bar81
Considering all the data showing the .13 micron process for the A64 maxes out at about 2.5Ghz on air cooling, these CPUs are not going to overclock any better than the other A64s out there although they *may* run cooler at those overclocked voltages *if* they can overclock at a lower voltage.

I beg to differ. Look at the Athlon XP chips compared to the XP Mobile ones. I have yet to see a vanilla Athlon XP 2500+ chip that can run at 2500mhz, but my 2500+ mobile chip can do it with ease.

You have to remember that these mobile CPUs are cut from the centre of the wafers, which makes them the pick of the crop. I'm almost certain that all A64 CPUs will NOT hit 2500mhz, in fact, the best I've seen out of one is the 2600mhz that Shimmishimm got out of his with phase-change cooling.
 

Bar81

Banned
Mar 25, 2004
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When did I say "all" A64 CPUs will hit 2500mhz? I have two CG stepping CPUs and with this Chaintech I've got right now I can get 2.45Ghz. I said the maximum air overclock one can expect is 2.5Ghz on air. I would expect all CG revision CPUs rated at 3200+ and above will overclock to 2.45 - 2.5 Ghz.

Just because they're cut from the center of the wafer doesn't mean they'll overclock higher. Why do you think AMD is waiting for 90nm chips to release the 4000+, because they know that 2.6Ghz isn't gonna happen on air cooling with the current 130nm process.
 

SickBeast

Lifer
Jul 21, 2000
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Well, you might not have said all A64's would overclock to 2500mhz, but you DID in fact say that all A64 chips would overclock to the same max speed, albeit at different voltages. I still must disagree with that comment. Read my original post if you do not understand.

Oh, and when a CPU is cut from the centre of the wafer it makes a very large difference. Sorry, I'm not trying to be argumentative or start a flame war, I'm just pointing out the facts.
 

Bar81

Banned
Mar 25, 2004
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No, there are no facts in your post. You're assuming that because you are guessing that the 1.2v CPUs come from the center of the die you'll see higher overclocks than 2.5Ghz. I'm telling you that you're dreaming. As I've shown above, AMD knows this, and anyone with am aircooled massively overclocked A64 also knows this. You're hitting the physical limitation of the 130micron process. For you to even compare mobile A64s to AXP mobiles shows that you're simply making wild guesses as the two architectures are not even remotely similar.
 

SickBeast

Lifer
Jul 21, 2000
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I never said that anything would overclock higher than 2500mhz, and the mobile CPUs are cut from the centre of the wafers, it's a fact, not an assumption.
 

Bar81

Banned
Mar 25, 2004
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Then how exactly do you see yourself disagreeing with me when you're now claiming you're not disagreeing with me???
 

Acanthus

Lifer
Aug 28, 2001
19,915
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ostif.org
Originally posted by: Bar81
No, there are no facts in your post. You're assuming that because you are guessing that the 1.2v CPUs come from the center of the die you'll see higher overclocks than 2.5Ghz. I'm telling you that you're dreaming. As I've shown above, AMD knows this, and anyone with am aircooled massively overclocked A64 also knows this. You're hitting the physical limitation of the 130micron process. For you to even compare mobile A64s to AXP mobiles shows that you're simply making wild guesses as the two architectures are not even remotely similar.

The athlon-64s architecture is derived from the Athlon-xp core.

Furthermore he is correct that they are hand picked parts from the absolute highest speed bin.

Calling it the physical limitation of the .13 process is a little silly as im running a chip with a larger core at 3.46ghz right now on air cooling :brokenheart:
 

SickBeast

Lifer
Jul 21, 2000
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Originally posted by: Bar81
Then how exactly do you see yourself disagreeing with me when you're now claiming you're not disagreeing with me???

I am still disagreeing with you. Read what Acanthus just wrote. The only mistake I made was to quote you as saying all A64s would hit 2.5ghz.
 

Bar81

Banned
Mar 25, 2004
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Originally posted by: Acanthus
Originally posted by: Bar81
No, there are no facts in your post. You're assuming that because you are guessing that the 1.2v CPUs come from the center of the die you'll see higher overclocks than 2.5Ghz. I'm telling you that you're dreaming. As I've shown above, AMD knows this, and anyone with am aircooled massively overclocked A64 also knows this. You're hitting the physical limitation of the 130micron process. For you to even compare mobile A64s to AXP mobiles shows that you're simply making wild guesses as the two architectures are not even remotely similar.

The athlon-64s architecture is derived from the Athlon-xp core.

Furthermore he is correct that they are hand picked parts from the absolute highest speed bin.

Calling it the physical limitation of the .13 process is a little silly as im running a chip with a larger core at 3.46ghz right now on air cooling :brokenheart:


Jesus, do I have to hold your hand. I didn't sign up to teach this special ed class. It's PAINFULLY obvious I'm talking about the A64 130 micron process. No where do I intimate nor state that I'm talking about every item fabbed under a 130micron process.
 

Bar81

Banned
Mar 25, 2004
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Originally posted by: SickBeast
Originally posted by: Bar81
Then how exactly do you see yourself disagreeing with me when you're now claiming you're not disagreeing with me???

I am still disagreeing with you. Read what Acanthus just wrote. The only mistake I made was to quote you as saying all A64s would hit 2.5ghz.

Why don't you do me a favor and state your argument logically explicitly showing how you're disagreeing with me. What you wrote is incromprehensible if it is in fact what you claim it is.
 

SickBeast

Lifer
Jul 21, 2000
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Bar81, since you insist, here is my argument:

-different cores based on the same stepping/process/whatever will not all overclock to the same level; as I said, the CPUs cut from the centre of the wafer generally clock higher at lower voltages

I guess that's it in a nutshell. I'm just trying to explain to you why people are worshipping the new mobile CPUs and buying them in droves.

Oh, by the way:

No, there are no facts in your post.

My post was in fact factual, as was corroborated by Acanthus who has more posts than the two of us put together then multiplied by a factor of two. I find that statement both insulting and inflammatory. In fact, your whole means of discussion seems to be very forced and vulgar, if I'm being honest.
 

Bar81

Banned
Mar 25, 2004
1,835
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Post count has no relation to intelligence or logic so save it for someone else.

I understand fully why people buy mobile CPUs but you seem to be completely missing the concept of logic. You stated you think that CPUs, here the A64 mobiles, cut from the center of the wafer clock higher than desktop CPUs. So, thus, considering CG stepping CPUs overclock to 2.45 Ghz minimum in my experience and by all accounts from others, you are claiming that these 1.2v A64 mobiles will overclock better than 2.45-2.5Ghz. Then you turn around and state that you never said the mobiles would overclock beyond 2.5Ghz. You're contradicting yourself. Make up your mind.

PS I'm glad you found a friend but he's clueless and you're confused (and I'm being kind)
 

Zebo

Elite Member
Jul 29, 2001
39,398
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Bar lets do a test, can your DTR run 1.8@1.2. If it can't these chips are superior and have more leg room which makes them a better buy. If it can then all cgs are the same and labled differently.
 

SickBeast

Lifer
Jul 21, 2000
14,377
19
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Originally posted by: Bar81
Then you turn around and state that you never said the mobiles would overclock beyond 2.5Ghz. You're contradicting yourself. Make up your mind.

I never EVER stated that the mobiles overclock beyond 2.5ghz, which some do as a matter of fact. There are a number of people on these boards running their mobile XPs at 2600mhz on air at less than 1.8v. The only case I pointed out was Shimmishimm's A64 at 2.6ghz using phase-change cooling. Where did you get the idea that I said the mobiles would overclock beyond 2.5ghz? Just because I said they would overclock "better" than the desktop versions? Hell yeah they will! If you want to take me literally, I would venture to guess that the desktop versions would top out at around 2.4ghz, compared to 2.5ghz on the mobiles. Like I said before, I don't know of a single person that hit 2.5ghz on a desktop 2500+ barton on reasonable voltages on air cooling.

Further to what Zebo is suggesting, I would reccomend going to the overclockers.com CPU database and checking out the average overclocks of both the desktop and mobile A64s and bartons. I'm very confident that the mobiles clock higher at lower voltages on average.
 

Bar81

Banned
Mar 25, 2004
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I'm not talking about bartons and I'm fully aware of what A64s overclock to. You don't seem to be as knowledgeable about A64s as you think you are. I know what CG stepping A64s overclock to and what mobile A64s overclock to. It's the same, 2.45-2.5Ghz

Unless you are claiming that the 1.2v mobile Athlon64s overclock beyond 2.5Ghz then you are agreeing with me whether you realize it or not.
 

Bar81

Banned
Mar 25, 2004
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Originally posted by: Zebo
Bar lets do a test, can your DTR run 1.8@1.2. If it can't these chips are superior and have more leg room which makes them a better buy. If it can then all cgs are the same and labled differently.

Again, read what I have stated. Just because at 1.8Ghz they work at 1.2v doesn't in any mean than they will overclock better. That's just an assumption based upon a whole different CPU. The Athlon64 overclocks do not improve with more voltage when you hit the wall at ~2.5Ghz thus showing you the limitations of even the new stepping CG chips, which the 1.2V mobiles are. If they could do 2.6Ghz then (1) AMD would intro the Athlon 4000+ on a 130 micron process and (2) AMD would introduce more low power A64s at higher clock speeds.

Tell me this, who in this thread besides myself has tested BOTH an Athlon 64 mobile and desktop CG stepping CPU? I would venture not a one of you. How you guys can, without any personal experience, comment on the current state of A64 overclocking continues to amaze me.

As to your other (useless) test; it's impossible as no motherboard will allow any CPU to undervolt to 1.2v In fact, thinking about it, I doubt any A64 motherboards have the correct voltage regulators to supply power at that low of a voltage meaning that the 1.2v mobiles aren't even viable candidates for anything outside of specifically created laptops.