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Topic Title: CG and CO? I'm confused......
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Created On: 08/07/2004 07:16 PM
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 08/07/2004 07:16 PM
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Talvai
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How do you find out if you have a CG or CO processor? Is their a performance difference?

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 08/07/2004 10:42 PM
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andrewzorn
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if you havent put it in yet... you can read it on the top of the processor, ...AR means CG, ...AP means C0.

if you have, there is software that can detect and report what it is. im not sure what it is or where to get it, but youll probably see at least one mention of it within the last week on this forum.
 08/08/2004 04:31 AM
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Sephiroth311
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QUOTE (Talvai @ Aug 7 2004, 03:16 PM) How do you find out if you have a CG or CO processor? Is their a performance difference?
Maybe, yes, only because the CG rev. can run more than 2 sticks of RAM in a system, but only maybe. Also because people are reporting better overclocks with the CG's. Nothing really special.

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 08/08/2004 11:24 AM
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Greyhound
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QUOTE How do you find out if you have a CG or CO processor?
If your processor is already installed and you have a running O/S, you can use a CPUID-utility to identify your processor:

CPUID 'F-4-8' is rev. C0 while CPUID 'F-4-A' is rev. CG - CPUID 'F-C-0' is a Newcastle-part(512KB L2-cache), ALL Newcastles are rev. CG

If your processor is not installed, you can determine its revision by looking at the OPN(Ordering Part Number) - it's printed on the processor itself.
Example:
ADA3200AEP5AP
CAAKC 0335XPMW

The 'OPN-suffix'(aka 'Part definition' will tell you the type/revision of the core:
'AP' - > Clawhammer(model 4), rev. C0
'AR' -> Clawhammer(model 4), rev. CG
'AX' -> Newcastle(model C), rev. CG(ALL Newcastles are rev CG)

ALL Socket 939 processors are rev. CG parts, btw.

You can find all A64/A64 FX specs as well as the appropriate OPN's here' ">http://www.amd.com/us-en/asset...nd_tech_docs/30430.pdf
QUOTE Is their a performance difference?
At default speeds, there is NO difference in performance between a C0 and CG-part of the same model.

Like Sepiroth pointed out, CG-rev parts are usually more overclockable since they are newer... also, CG-rev parts can run more than two sticks of memory at DDR400/PC3200 speeds(unless limited by the motherboard - check your boards' compatibility list) - an older C0-rev part *can* use more than two sticks, but their speed will automatically be limited to PC2700/DDR333 speeds(for ALL sticks, if more than two are installed).

Furthermore, CG-rev parts have a slightly improved Cool'n'Quiet feature:
At min. P-state, a CG-rev part is clocked at 1000MHz with a 22W max. power-consumption at 1.10V Vcore(CPU-voltage) whereas the older C0-rev parts are clocked at 800MHz with a 35W max. power-consumption at 1.30V Vcore - power-consumption and voltage at full-speed are identical, tho.

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