Memory issue with 990FXA-UD3 Board.

[Good Ole Spens]

Greetings,

I just recently finished a build for a buddy of mine. But after booting up for the first time to check on everything, I noticed on the System page that only 7.98GB's of the 16GB's of installed RAM were available for use. After browsing Google for hours and moving the sticks around, I have been unable to fix the issue. As stated above, the board is a Gigabyte 990FXA-UD3. I have 4 sticks currently installed, 2 from Team Vulcan, 2 from Team Dark, but all 4 are DDR3 and are clocked at 1600. At one point, after moving the sticks to different slots, the computer would blue screen shortly after logging into windows. The blue screening would cease after switching the sticks back into the original slots.

 

[Tradesman1]

What CPU? The MC (memory controller) may be having trouble w/ 4 sticks, might try raising DRAM voltage to about 1.55 and the CPU/NB volttage to about 1.2

 

[Good Ole Spens]

What CPU? The MC (memory controller) may be having trouble w/ 4 sticks, might try raising DRAM voltage to about 1.55 and the CPU/NB volttage to about 1.2

The CPU for the build is an AMD Phenom II X4 965 3.4GHz (Non BE), it's the same processor I have in my build actually, and I'll give that shot, thanks for quick reply.

 

[Good Ole Spens]

What CPU? The MC (memory controller) may be having trouble w/ 4 sticks, might try raising DRAM voltage to about 1.55 and the CPU/NB volttage to about 1.2

I tried what you said, and now Windows is saying 12GB'S of the 16GB's installed is usable. Should I bump the voltages up a bit more?

 

[Tradesman1]

Try CPU/NB to 1.275-1.3 if that clears the problem, then could try lowering it a bit (no real need as it's still safe, but I like to keep voltages low while maintaining stability)

 

[Good Ole Spens]

Try CPU/NB to 1.275-1.3 if that clears the problem, then could try lowering it a bit (no real need as it's still safe, but I like to keep voltages low while maintaining stability)

In this mobo's bios, there's NB core, and there's NB voltage, as well as CPU Vcore, I'm assuming of the 3 I'm supposed to change NB voltage?

 

[Tradesman1]

Yes try the NB Voltage

 

[Good Ole Spens]

Yes try the NB Voltage

I now have the Dram voltage running at 1.62v, and the NB voltage running near 1.35v, still stuck at 12GB usable of 16GB, anymore suggestions?

 

[Tradesman1]

Might try reseating sticks, maybe clean all the contacts, compressed ar to blow out the slots....could try CPU/NB at 1.4 but don't think I'd go any higher than that

 

[Good Ole Spens]

Might try reseating sticks, maybe clean all the contacts, compressed ar to blow out the slots....could try CPU/NB at 1.4 but don't think I'd go any higher than that

Yeah I'll try that, pc blue screened when I put the NB voltage up to 1.38v, so I dropped it back to 1.33v, so I'll go ahead and do that.

 

[Good Ole Spens]

Might try reseating sticks, maybe clean all the contacts, compressed ar to blow out the slots....could try CPU/NB at 1.4 but don't think I'd go any higher than that

My apologies for being troublesome, but on a side note, I switched both sets to opposite slots, and kept the voltage settings you showed me. And strangely, after swapping slots, windows bumped it back down to 7.98GB usable. Does this say anything to you?

 

[Tradesman1]

Might be overly tight DRAM slots, might reseat (yes again ) and with a little more pressure, let the side clips come up and lock the sticks in by themselves.....might also be a flaky or ill-seated CPU where the pins aren't getting full contact - to check might simly loosen the CPU cooler then snug it back down, not super tight, but snug, CPU might be out of level