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Upgrade DDR3 problem (CMOS Checksum bad)

(3 posts)
  • Started 3 years ago by k530
  • Latest reply from raphoenix
  • Topic Viewed 488 times


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Posted yesterday 
Posts: 1

My PC specs:
MSI 770 C35
AMD Phenom II X4 945

I tried to upgrade DDR3 from 2x2GB to 2x8GB (Kingston KVR1600C9D3/8G-SP).. I got this problem "CMOS Checksum Bad" when I tried those.
I already tried to reset / clear bios but still got the same problem.

MSI 770 C35 Specs:
DDR3 Memory DDR3 800/1066/1333/1600*(OC)
Memory Channel Dual
DIMM Slots 4
Max Memory (GB) 16

Posted 3 years ago
Posts: 164

Probably overstating the obvious, but are your 2x8's in slots 1 & 2 (same slots the 2x4's were)? Many MBs aren't happy unless their memory slots are occupied in proper order.
Try booting with one, then the other of your sticks in slot 1 just to verify they both work.

Posted 3 years ago
Posts: 14920

Check MB again as Model MSI 770T C35 supports only 8GB of Memory.

If true MSI 770 C35, then MB will support 16GB of memory.

Posted 3 years ago

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