From: Near Portland, OR
Initially we found more slow down with Intel multi-cores than AMD. I had two AMD 2 cores and found one had slow down with its graphics card, but the other didn't have any slow down problems at all. I read that AMD's switcher that determined what went to which core was better designed than Intel's. The graphics card threw another monkey wrench in the works. Most of the higher end graphics cards have drivers that use as many cores as the machine has and some DirectX calls that WitP uses would hang up the driver.
I've had very good luck with AMD. Most of my computers have run them for years. For some things, Intel is better, but AMD is better for some other tasks. My AMDs machines are 6 core processors and when I'm compiling code, it really moves along.
My last was a Phenom quad core. I didn't really like it as it ran hot with the processor fan screaming all the time.
I've got an Intel i7 with about 18 gigs of Ram. It runs this stuff just fine. I have a nice big Cooler Master fan on the chip, too, which I think helps. Why the processor companies use the lowest bidder on their fans...?
I always put an aftermarket fan on my processors, quiet power supplies, passive cooling on video cards, quiet case fans, etc. It costs more, but contributes to my sanity. On most of my systems the noisiest thing are the hard drives. When the technology gets a bit cheaper, I'll probably be switching to SSDs for all my drives. The cost right now is just a little too high to justify it.
WitP AE - Test team lead, programmer