Can a incompatible cpu boot to post screen?

ghettofied

Distinguished
May 17, 2011
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I bought a athlon x2 7750 to replace my broken athlon 64 x2 6400 but I just found out that I have to update my bios for it to work :( . When I tried booting it up nothing would come up on my monitor and I wouldn't get any beep, is this normal if the cpu is incompatible? Should it be able to boot up to the post screen atleast or the bios screen?