Download
CPU-Z' ">http://www.cpuid.com/cpuz.php. What does it say about your settings and cpu speed?
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AMD Athlon X2 4600+ @ 2.8Ghz
DFI Lanparty NF4 Ultra-D
2x 1GB G.Skill PC4000
XFX GeForce 7900GT
Antec TrueBlue 480w PSU
Thermaltake Xaser III case