I agree with same.

I do 5x boxing with a Core i7 920 and a GTX 580 3 GB with 12 GB of system ram.

For storage, I use two 64GB Kingston SSDs in RAID 0. My throughput is 450 MB read / writes. Loads times are about 5 seconds.

I can run all 5x clients on "good" settings at 60 fps each with the GPU showing only a 50% load and about 1200 MB of ram used.