Solved

Not all of my memory is usable

So here is my situation:
Yesterday I replaced the stock Intel cooler for my i7-870 with a water cooled system. After installing it, my computer would turn on and off rapidly, so I immediately removed the power. Come to find out, the motherboard wasn't accepting the fans in one of its fan power slots. After moving the radiator fan to a different power slot, my computer booted fine.

About an hour after messing with my computer, I noticed a performance dropped and found that my computer only was reading 4gb of my 8gb of memory. After some troubleshooting, I essentially switched the sticks with each other, and my computer now reads all 8gb with only 4gb usuable.

Here is a picture for reference:


Here are my system specs if needed:
Intel i7 870
Kingston 8gb (2x4gb) DDR3
Windows 7 Home Premium 64-bit Operating System
ATI ASUS R9 280x
Intel Corporation DH55TC (XU1) Motherboard
11 answers Last reply Best Answer
More about memory usable
  1. You're probably not using a 32-bit OS and not a 64-bit. If you're really using a 64-bit OS you could try testing a different motherboard or different memory sticks.
  2. Rockerbacon said:
    You're probably not using a 32-bit OS and not a 64-bit. If you're really using a 64-bit OS you could try testing a different motherboard or different memory sticks.


    I have had this computer for a year and it has ran fine with 8gb of memory. I don't think this would be the problem.
  3. your bios is the latest one 0048 also check if the memory are on the same dual channel slot .
  4. scout_03 said:
    your bios is the latest one 0048 also check if the memory are on the same dual channel slot .


    They are. I think that Channel A Slot 0 is bad. I don't know where to go from here though.
  5. Try in A1 and B1
  6. Tradesman1 said:
    Try in A1 and B1


    It is funny you said this because I literally just did this but got a beeping sound from my computer and it didn't boot.
    So what's next?
  7. Can try blowing out the slots with compressed air ( or take a real deep breath ;) ), also clean the DRAM contacts with rubbing alcohol and a foam swab or clean cloth
  8. Tradesman1 said:
    Can try blowing out the slots with compressed air ( or take a real deep breath ;) ), also clean the DRAM contacts with rubbing alcohol and a foam swab or clean cloth


    I can try that, but probably won't have access to compressed air until tomorrow.
  9. Best answer
    i use a white erase to clean my contact just sliding it on top without pressure on it http://www.officedepot.com/a/products/930065/Prismacolor-Magic-Rub-Vinyl-Eraser-White/
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