I have a few 1u rack mount servers sitting around that are running nicely but have older CPUs (eg. AMD Opteron 252's). I was thinking of throwing some new CPUs and extra memory in to get a performance boost.
What's a good way to figure out what CPUs (if any) are compatible?
[Update] One I was able to dig up is: HP DL145 2x 2.6GHZ OPTERON 2GB MEM 80GB SATA (dual opteron 252).
Start by telling us the make and model of the server...
If you currently have 252s, the 254 and 256 will almost certainly work. They're the same proc, with a slightly higher clock. It's possible your server's MB will not recognize these processors however.
Dual core socket 940 Operons exist, like the 285 with the same clock you have now, and twice as many cores. But your server might not accept dual core processors. The 290 is also available with a slightly higher clock and dual cores.