ASUS M4A79XTD Evo and F3-8500CL7D-8GBRL

[Daring Mayo]

As the title states, I'm using an ASUS M4A79XTD Evo and F3-8500CL7D-8GBRL and seem to be running into frequent bluescreens while in dual channel. I can with either of the sticks individually without any sort of issue at all, it only appears to negatively impact me when running with both of them in dual channel. I tried going in and setting timings and voltage to factory specs manually to no avail.

Specs:
ASUS M4A79XTD Evo w/latest BIOS
Phenom II X3 720
PNY GTX 460 1GB
Windows 7 64-bit

Any guidance or advice would be appreciated. Additionally, both stick are passing memtest without throwing out any errors.

Thanks for any help!

[Tradesman]

With the sticks being 4GB ea, may have to add some voltage to the CPU/NB maybe + .05 or so. Then if needed may also have to raise DRAM voltage to maybe 1.52/1.53. The MC (memory controller) may be having trouble, it's common w/ AMD CPUs, most all have weak MCs.

[GSKILL TECH]

If you continue to have problems, feel free to send them in for RMA and try a new kit.

Thank you
GSKILL TECH

[NemesisChild]

Have you tried running them in the outside, dual channel slots?

[Daring Mayo]

Have you tried running them in the outside, dual channel slots?

I have, but that doesn't seem to change anything I'm experiencing.

With the sticks being 4GB ea, may have to add some voltage to the CPU/NB maybe + .05 or so. Then if needed may also have to raise DRAM voltage to maybe 1.52/1.53. The MC (memory controller) may be having trouble, it's common w/ AMD CPUs, most all have weak MCs.

Tried this and also had no luck.

I ran more memtest passes on each module in each slot on the motherboard, they all passed without any errors at 8 passes each.

I did reseat the CPU and everything ran fine for awhile. I was able to boot in dual channel, everything seemed perfectly stable. I even managed to get multiple hours of heavy gaming in without issue. However today the problems started back up, and I'm back in single channel.

edit: Another piece of information that might be useful; the CPU temp is now running 3-4 degrees cooler with the memory in single channel than what it was in dual channel with identical ambient temperature (37C vs. 41-42C). Might be some information bias going on in my head, but would this further indicate issue with the CPU?

[Tradesman]

Could but consider in dual channel the MC (memory controller) is working harder so there will be slightly more heat - but it also indicates the the MC is straining still, so may want to raise CPU/NB even a bit more

[Daring Mayo]

Alrighty, I don't want to declare complete victory just quite yet, but things are indeed looking up. Further increase in the CPU/NB voltage and another small bump on the DRAM voltage seems to have stabilized things greatly. I'm booting in dual channel and currently on hour 3 of my 3rd Prime 95 battery.

Thanks for all the assistance, it's greatly appreciated when dealing with fairly frustrating issues such as this.

[Tradesman]

No problem....from the sounds of things....if you do have any further problems, would a tad more voltage to first the vCore, and see, then if needed a tad more to CPU/NB

[Daring Mayo]

Same problems cropped up again after leaving the computer off for a day, really not sure what to make of it. I found the thread discussing the cold boot issue with ASUS boards and some people seem to have had luck after RMAing, so I suppose I'll have to resort to that.

[Tradesman]

If you do, let us know how it goes w/ the new board.