phyglenaut Posted September 11, 2009 Share Posted September 11, 2009 I had the exact same problem as many others on a system at work: Installed 12 GB worth of RAM in A1,B1,A2,B2,C1,C2 slots (orange and black) and only 8 GB recongizned in the BIOS. Occasionally, system would not boot/POST at all without rearranging memory sticks. It seemed to be A1,A2 that were the most troublesome slots. I could get all 6 mem sticks to work in the other slots, but not those 2. Those 2 seemed to be completely dead. I didn't believe at first that CPU reseating would be the issue since it ran Windows XP x64 no problems on 8GB. Everything seemed pretty much rock solid. I thought people reseating the CPU were just somehow getting lucky and thinking that was the solution, when actually it was just perhaps tweaking something else unnoticed. But after so many posts seemed to indicate reseating the CPU helped, I investigated. I tried to look at the 1366LGA socket pins on the board but they are so small it is very hard to see them with the naked eye, although I did notice towards the lower right hand corner (side closest to DIMM A2) some pins seemed to be askew. I certainly didn't want to RMA it for some slightly bent pins. Luckily, I am at a school, and was able to borrow a microscope. I removed the board, put it under the microscope, and sure enough, in the lower right hand corner (side closest to DIMM A2) about 3 or 4 pins were out of alignment. I don't want to say "bent" because if you look at the pins that close up, under a microscope, you see that they seem to be springloaded from below the socket. I was able to take a tweaker screwdriver tool, and carefully, one by one, "bend" the pins that were off back into alignment. They seem to spring into place if you push them just right. As soon as I did this, I looked with the naked eye and saw that all the pins looked perfect at that point (they did not before). Then I reassembled and all 12 GB were recognized immediately, no problems. Hope this helps others who are having the same problem. I do not believe this is a Corsair or any other memory brand problem. Also, I do not believe it really is a motherboard problem (other than a design flaw). It is as hornett said, "bent" pins, or I would say just pins that need to be pushed / sprung back into alignment. I think the clasp that fits over the socket does crimp or pinch or however you want to say it, the exact same pins on every board when installing CPU. That is why everyone has a problem with A1,A2 slots. Link to comment Share on other sites More sharing options...
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