peter is being modest. What he really has is a dual use heater/computer farm in his basement.
I have the following:
x3350, 4 c2d cores @ 3.36 with gtx 260
q9450 4 c2d cores @ 2.88
q6600 4 c2d cores @ 3.0
t7250 2 c2d cores laptop @ 2.0
e7200 2 c2d cores @ 2.53
e7200 2 c2d cores @ 2.53
x2 4000+ 2 amd cores @ 2.1
I'm running v 5.03 on all the quads, but still ned to update the other c2d's. the x2 4000+ is my old work machine. I've been gone more than a year and it's still going!!
I'm only showing 19k ppd right now, but once my credit catches up I expect it to be closer to 30k. I'm doing about 2 astropulse wu's (at 1250 credit each) per core on all 3 of my quads. The other 3 c2d's are work computers so I don't expect quite as much out of them, but they were each running about 2000 ppd before the recent work stoppages.
btw I'm showing 121k pending right now. My mix is about the same as peter's, a bunch of the older wu's and a big pile of astropulse wu's.