Cpu or board or is another component faulty?

[itsjm]

i have a biostar h55hd with a i3 540, was working perfectly fine. just bought a used i7 860 , installed, and booted up into windows 7 and then shut down. now it just post and goes into the windos screen then keeps shutting down. i thought it was the psu and installed a beefier one and still a no go. please help whats the problem, bad cpu. ??

 

[rayy1212]

When you say used do you mean...
A. Refurbished and purchased from a retailer
B. Purchased from a previous owner?

 

[itsjm]

i bought off ebay, seller said it was used but did say it worked also.

 

[rayy1212]

I'm not going to claim whether or not I know if its a bad CPU but if I had to go off of a hunch that would be my first guess, but on that note what led you to believe it was rather the PSU?

 

[itsjm]

it was a low power psu, and i know i7 need more power than i3s.
im new to this so this might not matter, but it does post when its booting up it reckognizes that it is a i7.....could it still be faulty?

 

[rayy1212]

Do you have the previous CPU that was on the board before you upgraded if so I would try switching it back and trying to start again.

 

[Rahbot]

have you updated your Bios yet... sometimes that fixes stuff like that....

 

[rayy1212]

It could be a problem with windows and your hardware swap too I'm not at liberty to instruct you in what to do with your system but perhaps try reinstalling windows if it won't affect anything

 

[itsjm]

Do you have the previous CPU that was on the board before you upgraded if so I would try switching it back and trying to start again.

yeah i tried that it was working fine before i swapped cpus and after...

 

[itsjm]

have you updated your Bios yet... sometimes that fixes stuff like that....

like i said earlier im knew to this , and i really dont know how (or ever done it) to update bios ,
and i was thinking of maybe reinstalling windows to see if that will work.....

 

[rayy1212]

Try it

 

[itsjm]

Try it

hey,
i remebered that a i7 needs a stronger psu, but i forgot a i7 needs a stronger heatsink and fan also......i think i found the problem, i took out the heatsink to try reseating the cpu and i felt the heatsink a little light on taking a second look i noticed it was a heatsink from a celeron cpu, so i ran (not literlay, lol) and grabbed a copper core heatsink installed and it booted just fine, now im gonna let it run all night, to see how it does. is prime 95 a good test on cpus?