Prehaps it could just be a board/CPU incompatibility as I notice on the website the is a BIOS update for revision 3 board
Quote:
support AMD CPU up to Athlon 2200+/Duron 1.3Ghz (.18u) (for rev 3.x)
support Gigabyte Q-Flash
support HDD of size > 137G
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So this may mean the the older boards do not support the faster CPU's even though it says they do (there is not test sheet on the site). You really need to test the CPU with another board and also test another lower spec CPU with your board.