I've got a ThinkStation P720 and recently bought two 64GB ECC 2933 RDIMM sticks to upgrade my RAM. However, whenever I try to boot the machine with either of the new sticks installed, it just beeps three short beeps followed by one long beep, which according to the maintenance manual indicates "memory not detected." I've tried various combinations of my old memory and the new sticks but nothing seems to work. When I remove the new sticks entirely, the system boots fine.
I'm wondering if this new RAM is incompatible with my system. The user guide mentions that for 2933 RAM, you need a 2nd gen Xeon Gold CPU, while I have a 1st gen Xeon Silver. Yet, I thought my old RAM, which is also 2933, works perfectly fine even though it runs slower at 2400. Could it be that the new 64GB sticks won't work with my machine, despite the specs saying it can handle up to 12x 64GB? I'm looking for insights on whether this RAM is compatible and suggestions on how to test the sticks independently.
3 Answers
I think it's possible that the new RAM might not be compatible even if the old RAM is. The spec sheets can be tricky, and sometimes they list theoretical capabilities without real-world confirmation. You might want to double-check if those specific model numbers have known issues with your motherboard or CPU. Using Memtest on the sticks is a great idea—better safe than sorry!
Definitely look into memtest. It's a useful tool for diagnosing memory issues! Just remember that, while the RAM might physically fit, it still needs to be compatible with the motherboard's firmware and your CPU to work correctly. I'd suggest consulting the manufacturer's website for any firmware updates or compatibility notes—sometimes, those can make all the difference.
It sounds like a tricky situation! Just because your old RAM works doesn't guarantee that the new sticks will be compatible. There's a chance the new RAM has specific requirements that your system doesn't meet. I recommend testing each new stick individually with a tool like Memtest86 or Memtest86+, which can help you check if the sticks are functional on their own.
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