©ASUSTEK COMPUTER INC. ALL RIGHTS RESERVED.

Hopper64 · ‎05-24-2015

I occasionally get a Q code of 6F (or bF) on restart of the PC. It hangs at 6F for several seconds and then just shuts down after closing out windows. So instead of a restart, it just shuts down. Happens 2 or 3 times per week. I noticed it after doing one of the windows updates before reinstallation of windows, but even with this reinstallation it does occur. Machine runs fine otherwise. Any ideas? Thanks.

MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Arne_Saknussemm · ‎05-24-2015

bF is memory unstable...

:eek:

ARNE’S GUIDE TO PC BUILDING HAPPINESS

ARNE'S GUIDE TO OVERCLOCKING HAPPINESS

Hopper64 · ‎05-24-2015

But it only happens on a restart. Memory is OK per memtest. ??

MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Praz · ‎05-24-2015

Hello

As Arne wrote it is due to memory instability. That Memtest passes should not be a surprise as the testing is being done after successful memory training during POST.

Hopper64 · ‎05-24-2015

Perhaps bump the SAV a bit and watch? Didn't think that would be needed with 2400 memory.

MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Chino · ‎05-24-2015

All CPUs are different. Some will require manual tuning even if it's 2400MHz unfortunately.

Hopper64 · ‎05-24-2015

Yes, and you also taught me that each bios handles things a bit differently too. So, I enabled fully manual mode in the bios and dialed in 1.220V for my Vcore thereby eliminating adaptive mode completely. I also bumped the SAV to 0.890V from 0.888V. That small increase in the SAV may stabilize the IMC of the CPU per your other thread on tweaking for 3000 memory. I guess I will just watch it for now. Thanks.

MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Hopper64 · ‎05-27-2015

Had another bF Q code this evening. Happens very infrequently and only with a reboot. It just sticks at bF and then shuts down.

I hit the power and went to the bios and increased the SAV another 0.01V. I now have the SAV for this memory at 0.900V. As Praz stated, the memory is OK as I ran memtest 5.01 again-2 passes with no errors.

So, continue to bump the SAV by 0.01V until it's stable? Thanks.

MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Praz · ‎05-28-2015

Hopper64 wrote:
I ran memtest 5.01 again-2 passes with no errors.

Hello

This type of memory testing utility is pretty much irrelevant on this platform.

Hopper64 · ‎05-28-2015

Praz wrote:
Hello

This type of memory testing utility is pretty much irrelevant on this platform.

What's recommended?

MZ790A Bios 2002, GSkill F5-8000J3848H16GX2-TZRK, 13900KS, EKWB D5 TBE 300, Seasonic Prime TX-1600 ATX 3.0, Asus Strix 4090 w/ Optimus block, Phanteks Enthoo Elite, Asus Claymore 2, Asus Gladius 3, Asus XG349C, Samsung 990, Windows 11 Pro

Q code 6F