4 Optiplex 990's, an Optiplex GX650, and a Sager (Clevo W170HR). I'm thinking of playing around with the client on a Dell Poweredge with dual Xeons but I feel this folding stuff relies more on GPU power than processor power.
Depends on the processors & GPU's. Fermi & Kepler GPU's definitely have a bit of an advantage on the GPU side, & Kepler should only get better as the updated GPU client cores roll in with optimizations to take advantage of what Kepler can offer. Still, until GPU WU's all have an early return bonus, CPU's will continue to hold an advantage. On non-bonus GPU units, the best GPU's can only (currently) get up to 20,000 ppd per card. My CPU (i7-3930K 6-core/12-thread) when OC'd to 4.6GHz, has folded for just over 72,000ppd on certain WU's. Multi-socketed systems with at least 16 threads can run -bigadv work units for even higher ppd output. Some 32 & 64 thread 4-processor systems are turning in a single work unit every day or two... for 200,000 - 400,000 points or more
But that is on a server system built for 24/7 folding with little to no other use besides folding.
AtlasFolder for example http://folding.extremeoverclocking.com/ ... =&u=610964
He started out with server racks filled with more than 4 dozen GPU's, & quickly became the #1 folder in the world when you don't count the default names (anonymous & PS3). Since then he's dropped to just two folding clients, one is definitely a -bigadv folder, no idea what the other is (I haven't tried to look up his current folding hardware, if it's even posted anywhere)
, but with these two clients, he's managed to crank out over 17 million points in October & over 15 million points in November, that's over half a million points per day from just 2 clients with 95% of that total coming from the -bigadv folder which is turning in nearly 400,000 points every 15 or so hours.