new cpu blackscreen and a loud fan

Oct 29, 2018
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i just got a new cpu but i got black screen and a loud fan no blinking and my bios is updated
new cpu : intel xeon x5460
bios : dell precision workstation 390
 
Solution
It looks like your precision 390 has the Dell DN075 mobo. This motherboard has the Intel 975X chipset and it looks like the Xeon x5460 is not supported.

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Here's the CPU support list for a similar Intel motherboard: Intel D975XBX2 CPU support list