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HP Z600 Dual Xeon X5675 doesn't boot most of the time

HP Recommended
Microsoft Windows 10 (64-bit)

Hi, I bought a used HP Z600 and made an CPU upgrade to dual Xeon X5675. The Workstation boots fine with just one CPU installed, but if I install the second one it just just boots sometimes. It does boot sometimes and it works just fine but most of the time it doesn't boot at all and there isn't even a Bios screen. 


I had a bent pin on the second socket. But I bent it back and it worked fine again for 2 Boot sequences. After that it didn't boot again.


System specs:

CPU: 2x Xeon X5675

GPU: GTX 460

RAM: 4gb (2gb on each CPU)

OS: Windows 10 64bit

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