Z77 Extreme4

Hello all and thanks in advance!

I have a new build and the problem I'm getting is with the memory. The memory is on the supported list: G.Skill Sniper f3-12800CL9D-8GBSR2 (2x4GB)

When one 4 gb stick is installed, regardless of slot, I can boot fine. When a second is installed I get to 4F on the mb Dr Debug, then freeze with d0.

I have tried all slot combinations (A2 and B2 being recommended) to no avail. Each stick works when installed singly. Any help would be appreciated!
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More about extreme4
  1. Hi, IMO it's either a memory issue or a CPU socket bent pins one. I would firstly borrow a compatible kit from a friend and test.
  2. Thanks for the quick response.

    I thought perhaps it was a CPU issue when first booting, but went to a single DIMM and made it through Windows install with no problem and have been running fine for the last 48 hours. If I use either DIMM singly, I am still up and running fine. The issue is only apparent when I put both in. They are a matched pair, so it's not that...
  3. Okay, I have gotten both chips in and I am booted to the OS just fine. But I had to go into the BIOS and manually reduce the clock speed to 1333 from the 1600 that the chips are rated for.

    I don't exactly call that resolved, but it's working for the time being :??:
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