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.
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.
The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.
AMD Athlon 64 X2 6000+ 89W :: Asus M2N32SLI Deluxe :: 2x1024MB Muskin XP2-6400 DDR2-800 :: BeQuiet! Darkpower Pro 530W :: 2x WD Raptor 74GB/10k rpm, RAID 0 :: ATI Radeon X1950XTX