here's my wife's rig, she mainly use it for encoding movie.
mobo: Asus P5WD2-E Premium
cpu : Pentium D 920 2.8ghz @ 4.37ghz (lapped to 2000 grit)
ram : Corsair PC5400 667mhz
video: GeForce 6200 turbo cache
sound & LAN : onboard
PS : Ultra X infinity 600w
2 SATA 500GB RAID 0
Big Typhoon (lapped to 2000 grit)
Overclock from 2.8ghz and running 24/7 stable at 4.37ghz. Temp used to be my issue when I hitted 4ghz (idle 49C , load ~71C). I was a little scared to lap the HS and the cpu cuz if I f*ck up then I would have to give up my rig to my wife , but then I was like wat the heck. So I went to SEARS and grab me some sandpapers & lapped both the HS and the cpu to 2000 grit and boys.. the result didnt dissappoint me at all. Now my temps are idle at 38C and load at 62C. For average temp it would stay ~50C .. game temp would be around 55C. The only time it hit 62C is when I ran 2 Prime95 for like an hour or so. I can push it a little more but then I have to deal with the heat issue again so I'm gonna fold for now. Here's a few screenshot of prime95.
My cpuz validation:
http://valid.x86-secret.com/show_oc?id=104204