hi, i'm modding my pc first time.
here's my spec
c2d6300 1.86@2.66 stock fan
1gb corsair ddr2 667@950
WD 80gb, 320gb seagatecoolermaster 430 extreme power
1dvd burner, 1dvd rom, 1coolermaster muskeeter
i've run the prime 95 for like 10 hours still stage 1
.....
........
stage 1 is 20.28% complete
stage 1 is 21.40% complete
stage 1 is 22.53% complete
and so on ....
stage 1 is 67.60% complete
stage 1 is 68.72% complete
i din't touch vdim .. cos i dont really understand it. does that mean it's unstable ? thanx

Download Orthos and run stress tests like Small FFT or Blend.
If it doesn't crash after a couple of hours, it's probably stable.