Strange DRAM issues. Need a diagnosis!

darrowboat

Commendable
Jun 5, 2016
1
0
1,510
Hello,

I have been experiencing a strange problem. Earlier, I was playing a heavily modded version of Fallout 4. One of the mods was ENBoost, which forces the game to utilize DRAM when my VRAM isn't enough. Suddenly the game perma-froze so I had to hard shut off my PC. When I turned it back on, monitor stayed black (no signal) and a red DRAM LED light came on on my motherboard.

My motherboard has 4 memory slots, in this order: A1, A2, B1, B2. I have 2 sticks of 4GB/each memory for a total of 8GB DDR3. I have been using them for years. My motherboard recommends with 2 sticks to use either A1 & B1 or A2 & B2.

Anyway, to troubleshoot, I began switching around memory. First, I took them out of A1B1 and reinserted in same slots. No fix. Then I stuck them in A2B2. No fix.

Then I grabbed a single 8GB stick out of my brother's PC, stuck it in B1, and the PC booted right up. So my first thought was that either one of my sticks is bad or one of the slots in bad. So I took out my brother's stick from B1 and stuck one of mine into B1. PC booted up. Then I tried the other stick. PC booted up again! So I thought, huh, the sticks are good so the mobo slots A1 and A2 must be bad. Well, I stuck my brother's stick into A1 and A2 and PC booted up both times just fine.

So I honestly have no idea what the problem is. I can use a single one of my sticks just fine, it seems, but when I try to insert both, the monitor stays black and I get a red DRAM LED light on the mobo. Any idea what the issue is? Thanks in advance.

NOTE:
I also tried loosing and tightening screws on my motherboard. Didn't help.
Earlier this week, I upgraded my GPU to a EVGA Geforce GTX 960
Also earlier this week, a thunderstorm knocked out the power while I was using my PC. No direct issues from it, but may be related to this.

My hardware (growing in years):
Motherboard ASUS M4A88TD-M
DRAM G.SKILL Ripjaws X-series DDR3-1333 (2x4GB)

UPDATE:
Just stuck my sticks back into original spots A1B1 and PC turned on. Typing this as we speak with them in those slots. So now I'm more confused than ever lol.

UPDATE2:
Shortly after posting last update, my PC froze again with sticks in original spots.
 
Solution
Hopefully it's just one of your RAM sticks going bad and not the memory controller, perhaps having trouble running in dual channel. You could try putting both sticks in A1/A2 or B1/B2 to see if they will both run in single channel mode.

But you really should run a memory test to isolate a possible bad stick or memory slot. Memtest86 is free and will do the trick:
http://www.memtest86.com/

To really isolate the problem you should run each stick individually in every slot on the MB for several (3 or more) passes. It'll take a while, each pass takes an hour or two. If both sticks pass separately in every memory slot, then run both sticks together (both single and dual channel mode... e.g. single - A1/A2 and B1/B2, dual - A1/B1 and A2/B2).
sounds like your northbridge is damaged. call it a failing motherboard.

what a wonderful mod. seems like it might have started to kill your pc. I would try a clr_cmos just to make sure. but if you can't get your ram to run paired then chances are the problem is the motherboard is starting to go.
 

rcxtra

Reputable
Sep 15, 2015
410
0
5,160
Hopefully it's just one of your RAM sticks going bad and not the memory controller, perhaps having trouble running in dual channel. You could try putting both sticks in A1/A2 or B1/B2 to see if they will both run in single channel mode.

But you really should run a memory test to isolate a possible bad stick or memory slot. Memtest86 is free and will do the trick:
http://www.memtest86.com/

To really isolate the problem you should run each stick individually in every slot on the MB for several (3 or more) passes. It'll take a while, each pass takes an hour or two. If both sticks pass separately in every memory slot, then run both sticks together (both single and dual channel mode... e.g. single - A1/A2 and B1/B2, dual - A1/B1 and A2/B2).
 
Solution