There is motherboard gigabyte ga 965gm s2. If the processor Е6600 Costa Rica? Entangled in these cores completely. Motherboard on offsayte indicated that Е6600 fit, but there is a different frequency and the core.
Both revisions of the Gigabyte GA-965GM-S2 support Core 2 e6600, but pentium compatibility list is missing. Is pentium E6500. Probably the pentium e6600 is also working, albeit with a note from the Board that the cpu is unknown. But can and not earn.