I have a computer now that has the Sempron 3200+ 1.8ghz 256 L2 in it. I know this is a really low end processor and at this point im lucky to get past 6 tracks on Reaper ha.
My only option for this computer for CPU upgrades is AMD Athlon 64 4000+ 2.4ghz 1M L2, on up to the higher AMD Athlon X2...