Installed CPU cooler, now RAM slot 2 and 4 don't work

Alexandre Vancomerbeck · May 2, 2014

Computer specs:
Gigabyte Z87M D3HP
G Skill 2x4Gigs 2660 RAM
Gigabyte 760 GTX
Intel 4770K
CoolerMaster 212X CPU Cooler

So, I removed my old CPU cooler (and thermal paste) and installed the CM 212X and new thermal paste (as well as new Asus Xonar DSX sound card). No clearance problem between the new Cooler and the RAM slots, however, when I tried to turn my computer on, the fans turned on, one beep, but then the computer reset itself (before even reaching the bios page). After some testing, I figured that the RAM from slot 2 was causing the problem. If I put one slot of RAM in either slot 1 or 3, it's fine, but if I put it in 2 or 4 the computer doesn't want to start (it now constantly beep until I turn it off).
In the meantime, I put the RAM in slot 1 and 3 (instead of the matching color of slots 1 and 2) and that works (even if not ideal) but I have no idea what happened to the other 2 slots. Seems like they are fried?

Any idea what could have happened? Not much I can do other than leave the RAM were they are and no future options of adding more RAM, isn't it?

hans_pcguy · May 2, 2014

You may have damaged the slots or gotten something in them. Pull the ram out carefully inspect and clean the slots. You might get lucky.

Tradesman1 · May 2, 2014

Try loosening the cooler then snug it back down, not overly tight , may have a corner or side to tight and throwing the CPU out of level so not getting full contact to the pins

Alexandre Vancomerbeck · May 2, 2014

The computer is fine now (starts and run ok), it's just that 2 of the RAM slots are not working. The 2 RAM sticks work fine as long as they go in the mobo slot 1 & 3; computer wont boot if I try to put any RAM stick in the mobo RAM slot 2 or 4. Maybe I will try compressed air in the slot 2 and 4. Maybe something fell in there?

EasyLover · May 2, 2014

Pl consider installing your CPU again. If it does not help then we may be left with two options, either the MC (Memory Controller) in the CPU is malfunctioning or damaged or the sockets themselves have been damaged.

For the first possibility, you may install the CPU on another mobo and check the RAMs there. If RAMs work there then CPU is ok and problem is on the mobo otherwise there is a definite problem with the CPU.

you may also consider removing the cooler and installing the stocker cooler on the CPU and give it a try.

If you happen to have the voltmeter then you can also read the values on the sockets/slots 2 and 4.

Regards,

burki94 · May 2, 2014

I think on some boards slot 1 must be filled before slot 2 can be used, right?

Tradesman1 · May 2, 2014

On your mobo for dual channel can put the sticks in either 1-3 or 2-4 (from CPU)

Alexandre Vancomerbeck · May 2, 2014

EasyLover :

Thanks, I will try to test the slots 2/4 with a voltmeter. With the computer turned off, just test for resistance? Or is it with computer on, check for voltage (~1.5V ?).
Also, I now remember twisting the CPU cooler a little bit after it was installed as it wasn't super straight on top of the CPU (not a good idea, in retrospect, I know ;/ ). Maybe I would have damaged the CPU a bit (I didn't realized the CPU would be controlling the RAM usage, so that could make sense if that's the case)?

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Installed CPU cooler, now RAM slot 2 and 4 don't work

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