Originally posted by: Denithor
9500GT isn't going to produce many ppd. Stick with the CPU.
EDIT: Just to clarify - these days the WUs have gotten tougher - I wouldn't recommend crunching with anything below a 9800GT. And if you're spending money to up your ppd - go for a GTX 260, those have about the best ppd/$ available today. And make sure you get a card from EVGA/XFX/BFG with a lifetime warranty (don't forget to register it!!) - folding puts a lot of stress on cards (especially the fan - I've got an 8800GS I need to RMA as the fan has started clicking).
Yeah, the HTPC is in the living room, so anything louder than my Zalman VF700 running at 5V on the 9500GT is a no-no. A GTX 260 with a stock fan isn't silent. Thanks for the information and I'll just let my Q9400 do all the work.
On a side note, I'm quite impressed with myself building my HTPC. I used the Zalman VF700 @5V for the video, a PC Power and Cooling 500w Silencer for the PSU, and a Zalman 9500CNPS for the CPU (I use the BIOS fan controls to regulate temps and fan speed). I also have a 92mm Antec Tri-Cool fan in the front of the case (Antec Solo), which is set to low (low/med/high are the options). This HTPC can handle anything I throw at it and the temps stay very cool. It is actually more quiet than my PS3 (which is pretty silent itself).