
Originally Posted by
parsec
You have a older version UEFI, it's at 2.50 now, which has had some fixes, including a fix for LLC. It's not hard or risky to update the UEFI using the ASRock Instant Flash. Just download the latest version of the UEFI, unzip the file, and copy it to a USB flash drive. Put the USB drive into a USB 2.0 port on the rear I/O panel, and reboot the PC. Enter the UEFI the usual way, and select Instant Flash, at the bottom of the Advanced Menu. Just follow the prompts and it will finish fine, I've done it many times on two of these boards, never a problem. All the UEFI settings will be set to defaults after you change to the new UEFI, so be prepared to get into the UEFI to reset any settings. If you save UEFI profiles with the AXTU feature, "OC DNA", you should be able to use it restore your settings quickly.
You can also try a few other things to OC higher. In the Advanced, CPU screen in the UEFI, set "Intel Virtualization Technology" to Disabled, if you don't use that.
Since you don't use the CPU's onboard graphics, set the LLC for the GPU to 5, the lowest level, and set its voltage to Offset Mode, and set the GPU offset to -0.200V. I could not set the GPU lower than that, the PC would not boot even though I am not using it.
If there are any features you don't use, like the Serial port, Infrared port, ASMedia chipset, etc, disable them in the UEFI.
I assume when you OC, you have the CPU power saving options (SpeedStep, C1E, C States) disabled. You could try enabling them, which will change the CPU speed to 1.6GHz under low load, but set the Turbo Multiplier to 46, and see if it boots and runs stable.
Bookmarks