It might help if we knew the rest of your components -- mobo, RAMs, cooling, etc.
1) Read your mobo manual and learn how to reset your CMOS (if necessary);
2) Drop your memory ratio one notch (i.e., one speed grade);
3) Lock your PCIe to 100MHz; and
4) Raise your clock from 200MHz to 2??MHz (depends upon your cooling solution).
240MHz (3.6GHz) would not be uncommon with adequate cooling. Download
CPUz and
HWMonitor to view speed and temps.
Snag something like
OCCT to stress your OC and test for stability.
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