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2 RAM slots not working / booting

Hi

I am having difficulty trying to run dual channel RAM on my new system build:

i5 3570K
Asrock Z77-PRO3 mobo
G Skill Ripjaws 8G(2x4G) DDR3 1600 1.5V
Radeon R9 270 GPU
Antec HCG 520W PSU

I can run the system fine with one stick of RAM in slot 1 or 2 (A1 or A2) but if there is a stick of RAM in slot 3 or 4 (B1 or B2) - either with or without the other stick inserted - I get a 4-beep timing error code, the fans and LEDs power on briefly, then the computer shuts down and tries re-starting again, only to go through the same pattern over and over til I cut the power.

I've played around with both RAM sticks and all 4 slots, checking that the RAM is properly seated, and I've concluded that slots 3 & 4 aren't currently working. This is a pain since dual channel will only work in slots 1 & 3 or 2 & 4, not 1 & 2. My thought is that either I need to change something in the BIOS or the mobo is faulty.

Updating the BIOS didn't help and neither did setting the timings manually to 9-9-9-24-2N (as listed for my RAM). Beyond that I am not familiar enough with the RAM BIOS settings to do much. I've logged the issue with Asrock support and I am waiting for them to respond.

In the meantime, does anyone here have any suggestions as to how I can fix this (assuming the mobo is not faulty)?

Thanks
9 answers Last reply Best Answer
More about ram slots working booting
  1. Did you try clearing the CMOS? Trying different RAM in those same slots?
  2. allocco91 said:
    Did you try clearing the CMOS? Trying different RAM in those same slots?


    I haven't cleared the CMOS but it is a newly built system and the very first time I tried booting it (slots 2 & 4 populated) it gave me the error.

    I have tried each stick in each slot - each stick will work in slot 1 or 2, so I know the RAM isn't faulty, but neither stick will work in slot 3 or 4.
  3. Also I don't have easy access to more RAM!
  4. Best answer
    Flash the BIOS to the latest version. If that doesn't work, RMA the board.
  5. Yeah I am starting to think it's just a fault with the board.

    Sorry to sound like a noob, but when you say "flash the BIOS" do you just mean I should update it to the latest version from Asrock's site?
  6. J_I_M_M_Y said:
    Yeah I am starting to think it's just a fault with the board.

    Sorry to sound like a noob, but when you say "flash the BIOS" do you just mean I should update it to the latest version from Asrock's site?


    Yes
  7. Also, I've just had it suggested to me that I check for bent CPU socket pins. Hopefully that's not the case....
  8. J_I_M_M_Y said:
    Also, I've just had it suggested to me that I check for bent CPU socket pins. Hopefully that's not the case....


    Yes, that can also be the problem. Usually, this thread will have the problem in it.

    http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems
  9. Just an update - I ended up sending the motherboard back and received a replacement, which is now running dual channel RAM without any problems. So it was just a fault after all.

    Thanks for your help.
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