Z370 Extreme4 XMP bug

Hello and sorry me again,

i found out the the xmp profile on the 1.3 bios for extreme 4 board has set
vccio and vccsa way to high. was set to 1.2 and 1.25 by default xmp.

For me this was the reason why the system could not boot into windows and was unstable.

I have now set xmp profile for my ram (3200) and then manually lowered

vccio to 1.1V and vccsa to 1.15. Not the system is rock stable again ram running finally with xmp speeds corretly.

Maybe this is helping one or another of you guys.

Best regards

flode

Edited by Flode - 10 Dec 2017 at 7:37pm

wojwen wrote: I recently bought Z370 Extreme4 mobo and after upgrading the BIOS to 1.30 XMP stopped working properly. Windows would randomly freeze (almost always after stopping a CPU benchmark). Turning off XMP profile worked and I didn't experience any crashes after that. Later I downgraded BIOS to 1.22 and again turned on XMP. After the downgrade everything was fine so I'm sure there is an issue with the newest BIOS. My specs:  CPU i7-8700K Motherboard ASRock Z370 Extreme4 RAM Corsair Vengeance LPX 16GB 3200MHz GPU MSI GeForce GTX 970 GAMING 4G Storage Samsung 850 Pro 256GB, WD Blue 1TB PSU Corsair RM650X Cooling Noctua NH-D15S Operating System Windows 10 Pro

This is the first report of this situation with your board and UEFI version, although it has only been available for a week.

While it might be an issue/bug, it is also possible that this occurs with your model of memory, but not others. That could still be a bug with your memory in particular.

You said that XMP stopped working, but what does enabling the XMP profile do? It applies a built in over clock of the memory speed, sets some of the memory timings as needed for that speed, and increases the DRAM voltage. When the XMP profile is not enabled, the memory is running at its stock, default speed which is easier on the memory controller.

What is really happening is your memory overclock seems to be causing Windows to freeze randomly after closing a CPU benchmark.

Yes, the previous UEFI version with XMP enabled did not seem to cause the freezing in Windows. Are you absolutely certain that the UEFI option settings you used between the previous and new UEFI versions are absolutely identical? Including manually set voltages? Any comparison between the two must be identical. Can you see any differences in the memory settings and memory related voltages between the two UEFI versions with the XMP profile enabled?

If you believe there is an issue, please file a support request with ASRock on this page, or via the support site for your region of the world:

https://event.asrock.com/tsd.asp

I recently bought Z370 Extreme4 mobo and after upgrading the BIOS to 1.30 XMP stopped working properly. Windows would randomly freeze (almost always after stopping a CPU benchmark). Turning off XMP profile worked and I didn't experience any crashes after that. Later I downgraded BIOS to 1.22 and again turned on XMP. After the downgrade everything was fine so I'm sure there is an issue with the newest BIOS.