I have taken ownership of a Core2 Duo processor and wanted to test it on a Dell Optiplex 280gx that is also socket 775 but obviously doesn’t support Core2 Duo but went ahead anyway. After installing it, I powered up the Dell but nothing happened. Now what i would like to know is if you think I might have done damage to the Core2 Duo chip. I haven’t got the right motherboard yet to see but I’m now scared to go buy a motherboard and find that the chip doesn’t work anymore because i don’t have lot of money to waste. Please, any info will help.