Built a new PC recently and thought everything was working fine. Then I started to get CRC errors in installers even though they would work fine later, and getting PFN_LIST_CORRUPT blue screens so I figured I had a RAM issue.
I ran a memtest and sure enough it failed on test #3. I then tested each individual module (i have 4) in the same slot on the mobo and they all passed a single pass memtest. I then tested them in pairs of two (in the same two slots) and the second set failed on test 3 again. However they passed when I tested each one of that set individually.
I then put all four back in and it failed memtest again. I reseated them in different slots and after this the memtest passed for 6 hours. However the next day the same thing started happening and when I ran memtest it failed again.
I have increased the QPI and DRAM voltages but doesn't seem to make a difference. Also running at stock speeds and timings. Motherboard is a gigabyte ga-p55a-ud6 with the latest BIOS and I'm using G.skill cas7 ddr3 ram, 4x 2gb modules.
I know there's an issue with my RAM or motherboard but the problem is I'm just not sure which. Would there be any way I can test this to make sure I know what to RMA? The ram came in 2 packs of 2 so preferably I'd be able to figure out which RAM module(s) is causing the problem so I can continue to use the PC (if indeed my mobo is ok). I don't have any other DDR3 ram that I know is good, nor another P55 mobo to test the RAM on.
What I'm thinking of doing is taking two sticks out, running with two for a day or two, then swapping into the other two slots on my mobo and letting it run for a day or two. If I'm blue screen free then I can assume it's a problem with the other two sticks. If I get a blue screen when i swap into the other two mobo slots, then it's the mobo ( ) I'm not sure if this is a good way to go about it though!
Cool, thanks! In the case that AB runs well and CD runs well but AD doesn't, does that indicate a problem with the mobo or the ram?
Just one other thing, if i notice in memtest that the memory range changes depending on the position of the ram (e.g. fails in 0-2048 range, swap around and then fails in 2048-4096 range) does that indicate the ram is faulty? I assume the memory is addressed in a constant fashion between boots (e.g. slot 1 -> 0x0 - 0x80000000, slot 2 -> 0x8000000 -> 0x100000000). Would there be anywhere I could find how this memory is mapped for my motherboard?