Zitat von tocirahl im Beitrag #1

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I need some help understanding the interaction between CSM, Secure Boot and a custom vBIOS.

I have an ASUS N550JK laptop with a NVIDIA GTX 850M graphics card. NVIDIA has the card locked down so that you only overclock up to about ~1200 MHz on the core, so I modded the vBIOS to overclock the card further. Now the vBIOS lives as a module in the mainboard BIOS. The overclock works fine when I boot up with CSM (Compatibility Support Module) Enabled, and Secure Boot off, but will not work with CSM Disabled, or Secure Boot on, which will boot with stock clocks. This happens on both Windows 10 and Windows 8.1 (both UEFI installs).

Does anyone know why this is happening or if there's a way to allow me perform a secure boot, but still retain my vBIOS overclock?

Here's a link to my BIOS: http://1drv.ms/1ML8e8i

TL;DR: Disabling CSM disables my vBIOS overclock. Why is this?

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I don't think it is that difficult and the only reason I wrote so many explanation and warnings is to give the users a choice, instead of just offering a tool. What you need is Kepler Tweaker and a map. If you disable CSM and use Fast Boot or Secure Boot, you need to tweak the VBIOS from the two GUIDs (only one will be used either way). If CSM is enabled, tweak the VBIOS from CSMCORE. For all cases, tweak them all. I can assist you in removing the duplicates from CSMCORE, if you need. I can also check the result of GOPupd if you plan to use it.

There are enough tutorials on OCN about overclocking, so you don't need help about that.