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RE: Precision T7500 strange Pb7 message

I've got same PB7 error. It's a T5500 with two X5690 and 48GB ram. Everything works with one CPU, but not when the second CPU (riser) is present. I've tried swapping CPU, both worked in the main motherboard, so it's certainly not CPU.

Check this post. en.community.dell.com/.../19589143

The last two seem to suggest that there is a mechanical issue. Can someone from Dell please confirm?

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