try replace cmos battery and clear cmos settings via motherboard jumper.

it is compatible

https://www.userbenchmark.com/UserRun/48468591

hi

thanks for your reply , i shall give it a go much appreciated 

regards

albouet

@redxps630​ 

hi sorry for delay responding, tried what you suggested didn't work any other ideas ?

regards

albouet

inspect cpu socket closely for any bent pin.

@redxps630​ 

hi looked at socket with strong magnifier, all pins seem ok, maybe the motherboard. would i need to upgrade bios and change the heat sink ? i did update the bios prior to buying the i7

regards

albouet

no you do not need to update bios for that cpu.  you said you upgrade the bios prior to i7.  try putting the old cpu back carefully to verify that the board still posts.