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aztechnology said:a 175 Opteron has 2MB L2 cache, an x2 4400 only has 1MB L2 cache. If you can find a 175 there are worth having.
I thought that both the 175 and 4400 had 1Mb per core? The AMD site certainly seems to suggest this is case for the 4400.
The 175 requires fewer volts than the 4400 I believe, possibly making it a little more clocking friendly and run slightly cooler.
cheers
v.f.