For AMD Chips it remains the same reguarding ram requirements.
These are just guestimates
AMD Athlon II x2 @ 3.0ghz, 3 Bots.
AMD Athlon II x2 @ 3.8-4.0ghz, 4 Bots
AMD Athlon II x3 @ 2.5ghz, 4 Bots.
AMD Athlon II x3 @ 3.8-40ghz, 6 Bots
AMD Athlon II x4 @ 2.4Ghz, 6 Botz
AMD Athlon II X4 @ 3.8-4.0ghz, 10 Botz
If you have a Phenom Chip or lower, Just go with 1 bot per core.
If You have a Phenom 2 Chip, use the guide above, as cache size more than likely won't have an effect on the number of bots you can run.
Thing to remember AMD chips have a lower
IPC, do not support
Hyper-threading, and cant
overclock as high as their Intel Counter parts.
ON the plus side, they're cheaper than Intel chips are so the cost of a dedicated box is cheaper up front.