tocirahl Posted August 4, 2015 Share Posted August 4, 2015 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/1ML8e8iTL;DR: Disabling CSM disables my vBIOS overclock. Why is this? 1 Quote Link to comment Share on other sites More sharing options...
Bios Modder Klem Posted August 4, 2015 Bios Modder Share Posted August 4, 2015 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?TL;DR: Disabling CSM disables my vBIOS overclock. Why is this?Post here or in PM your backup of bios. Quote Link to comment Share on other sites More sharing options...
tocirahl Posted August 4, 2015 Author Share Posted August 4, 2015 Post here or in PM your backup of bios.Here's a link to my BIOS:http://1drv.ms/1ML8e8iThanks! Quote Link to comment Share on other sites More sharing options...
Bios Modder Klem Posted August 4, 2015 Bios Modder Share Posted August 4, 2015 Here's a link to my BIOS:http://1drv.ms/1ML8e8iThanks!This is for you: Zippyshare.com - N550OC.zip Quote Link to comment Share on other sites More sharing options...
tocirahl Posted August 4, 2015 Author Share Posted August 4, 2015 This is for you: Zippyshare.com - N550OC.zipThanks, I appreciate it. But what exactly is this file? What got modified? Quote Link to comment Share on other sites More sharing options...
Bios Modder Klem Posted August 4, 2015 Bios Modder Share Posted August 4, 2015 In this file I placed your overclock settings in UEFI. Quote Link to comment Share on other sites More sharing options...
tocirahl Posted August 4, 2015 Author Share Posted August 4, 2015 In this file I placed your overclock settings in UEFI. Can you tell me how you did that? . That's really neat! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.