will this work

Dell Optiplex GX620 intel i945p/pl/g/gz Intel Core 2 Duo E4600
Bios Rev 11 Current on my motherboard?

what? and it should be rev 1.1 and not 11. Current on your mobo will show up on the bios settings on the MIT tweaker(gigabyte mobos) or something like that where your clock speed will also be shown.

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