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Frontpage Slideshow | Copyright © 2006-2010 orks, a business unit of Nuevvo Webware Ltd.
Monday, 15 November 2010 06:27

AMD Athlon II X4 645 in the labs - oc/uv

Written by Eliot Kucharik

athloniiquad_logo athlon_ii_x4_645_small

Review: Slight speed pump for the Athlons

amd_athlon_ii_x4_645_cpuz

We have already stated the specs, so here the CPU-z screenshot which also stated that the new CPU is one of the new C3 steppings.

 

Undervoltage:

While AMD has reduced the VCore to 1.35V, we checked how much lower we could do. With our board the lowest was 1.275V with stable prime. Of course each CPU and board behaves differently, so make sure to run Prime95 to ensure stability.

amd_athlon_ii_x4_645_uc_prime_ev

 

Overclocking:

First we checked how high we could go without increasing the VCore. Sadly our board did increase the VCore to ~1-38V but without this slightly increase we would not have managed a stable prime at this frequency anyways. Also, depending on CPU and board your results may vary.

amd_athlon_ii_x4_645_oc_stock_prime_ev

 

We could manage a boot with 3.80GHz but it was impossible to achieve a stable Prime95 result regardless of the used voltage.

amd_athlon_ii_x4_645_oc_3800_cpuz

 

With 1.48V we could manage 3.50GHz stable:

amd_athlon_ii_x4_645_oc_3.5_1.45V_prime_ev

 

Regardsless of not beeing prime-stable for the time beeing, we tested our overclocked CPU with 3.60GHz with 1.55V.

(Page 2 of 5)
Last modified on Wednesday, 17 November 2010 06:58
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Comments  

 
+4 #1 guideX 2010-11-15 08:28
Cannot say i fully understood a single page of this review.
 
 
+3 #2 stoneeh 2010-11-15 08:34
speed bump, actually
 
 
+2 #3 genetix 2010-11-15 09:01
Not that its' relayted to this article, but it's still fully any people trust or benchmarks with Entech/FutureMark benhcmarks. They haven't understood hardware in years and it truly shows here at 3DMark.

As for article I honestly think the 5 pages shows all needed for the released new core.
 
 
-2 #4 hellfire 2010-11-15 09:51
Quote:
Slight speed pump for the Athlons

erm..speed...Pump? what is that?
Quote:
Before we render a conclusion, let's have a look at the overall benchmark results

O_O...oh thank you for looking at benches before the conclusion
Quote:
We are not very fond of the 100/133MHz increases of any manufacture on any CPU

...
Quote:
even when games are sadly not optimzied on the AMD platform

optimised on AMD platform? erm..if you talkin bout GPU its ok but cpu..
 
 
+6 #5 CRoland 2010-11-15 10:39
Quote:
We are not very fond of the 100/133MHz increases of any manufacture on any CPU. It's quite senseless to increase the frequency so little in the 3GHz age, because it does not make much difference, besides the money the companies will cash it for.


Not sure about Intel, but whenever AMD does one of these across-the-line speed bumps, the new models replace the slower ones, in effect making the CPU at any price point faster.
 
 
-12 #6 Tr0y 2010-11-15 10:41
Does the world really need a million different AMD processors with only slightly different clock speeds?

We now have the whole spectrum between 2,7 and 3,6 GHz covered with 0,1GHz steps.

Why would I go for a 3,4GHz CPU when I can get a 3,5GHz for (almost) the same price? :o
 
 
-15 #7 HiTechpro 2010-11-15 11:49
AMD CPU and GPU is the cheap and slow poormans PC parts,discount parts.
 
 
+1 #8 loadwick 2010-11-15 12:27
that is a seriously poor overclocking sample you have there. I am not trying to brag i am just wondering if you tried everything to get it working at higher frequences. I needed to increase many voltages to get mine stable. I bought a X4 620 (2.8GHz) and run every voltage at stock and get 3.6GHz out of it. I had so got it stable above 4GHz but there was a lot heat to deal with and not worth it because of the noise.

Did you try dropping the multiplier and running the FSB really high? I mine goes to 320MHz without a problem.
 
 
+1 #9 Haberlandt 2010-11-15 15:39
Quote:
A potent graphics-card will always be more crucial for good framerates then a faster CPU.



Maybe a couple of years ago, but as broken as games are nowadays, I highly doubt it.
 
 
-8 #10 AndromedaB 2010-11-15 16:51
Once you buy AMD, you don't go back... to AMD.. ever again
 

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