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- Upgrading a Z840 workstation from E5-2699 V3 to V4 and getti...

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01-13-2023 08:46 AM
I'm trying to upgrade from a dual E5-2699 V3 to dual E5-2699 V4. I have 128GB of RAM and the latest BIOS. System was running fine with the V3 processors, but Now I post with 5 BEEPS indicating a memory issue. I have tried removing all RAM and processor for CPU1. Same results. Switch the two V4 processors and same results.
Not sure what else to check.
All my RAM is the same PC4-2133 ECC and has never had an issue with the V3 CPUs.
01-14-2023 12:51 AM
Found the issue to be a capacitor that was broken off one of the processors. With that missing capacitor, the MB was throwing an memory error, but I'm guessing with the missing cap, the chip was having issues talking to the RAM.
With the good E5 2699 V4, I was able to run with one processor and use all the 8 RAM sockets for that processor, or both processors and only the first 2 RAM sockets for each processor.
Was lucky to see the missing capacitor. They are pretty small, I'd say 0402. The pads appear to be missing, otherwise I'd try to replace it.
Maybe this will help someone else in the same situation.