Just a warning to all, once you flash to 0813, you cannot rollback.
After I updated and re-loaded my Asus profile it wouldn't post. I had to reset to default and fiddle with but finally got it all working again with the previous settings.
One interesting observation, I use the AI overclocker (yes I'm lazy) and it looks like my CPU voltage was lowered. Wondering if this is part of the reason why you cannot rollback?!?!
Tried it on my Z790-F and will be reverting back to the previous version. This BIOS needs lower frequencies and worse timings to get the RAM stable, and CPU OC is worse as well. Like, I've gone from a stable system to failing at POST, with the same settings. That's remarkably bad for a BIOS update.
Silent Scone@ROG wrote:
On my personal rig, I've not noticed any difference in RAM stability between UEFI updates and I'm running 8200MT/s. Please try to remember that simply because a UEFI revision doesn't set hundreds of predefined settings outside of reference code that works happily without tuning, doesn't make it a "bad BIOS update." When flashing to a new UEFI (which potentially also has a new ME firmware), tuning may be required when overclocking.
No, it's bad because you've changed something that makes it impossible to get the same RAM performance as before. And I've spent days on the timings and testing.
Rolled back to 703 just fine, no issue doing that from EZFlash. I did reset to Optimized Defaults though before going through the BIOS update. Didn't want to have any ram stability issues when trying to do a BIOS flash.
Works just fine now that the BIOS flash was finished, I noticed also this option in the BIOS. If that's disabled it appears it only allows BIOS upgrades, not a rollback. So that might be the cause of blocked rollback if you changed that for some reason.
I could not roll back the bios either through the utility or through ezflash (tried the 502 and 703). In the bios I kept getting an error saying something to the effect that the bios was invalid. I could re-flash the current 813 bios repeatedly both through the bios and through the ezflash utility. Using different USB drives made no difference. Toggled the rollback setting you are referring to and it also made no difference.
In regards to memory and timings, I have the two sticks of Gskill F5-7600J3646G16GX2-TZ5RK (36-46-46-121). The default XMP settings would produce the occasional error in memtest. I set the speed to 7600, loaded the hynix-7600 preset (36-44-44-52), and set the maximustweak to mode 2. I've run memtest for hours without an error.