I am having an issue of the computer will not post if I turn off csm or turn on fast boot. I do not have a speaker to hear the beeps. The computer will act like it is starting but no video output.  I then have  to remove the cmos battery to reset the bios and all is good again. I know i could just leave the fast boot but the problem has me stumped and i hate to be stumped. I have installed windows 10 on both HD's. I have used Rufus to make sure that windows installs in uefi. My video card bios shows it is uefi.  Any suggestions would be appreciated.  Below is my system.

Intel - Core i5-8600K 3.6GHz 6-Core Processor

Gigabyte - GeForce GTX 1070 8GB Founders Edition Video Card

ASRock - Z370 Extreme4 ATX LGA1151

G.Skill - Aegis 16GB (2 x 8GB) DDR4-3000 Memory

Samsung - 960 EVO 500GB M.2-2280 Solid State Drive

Samsung - 840 EVO 500GB 2.5" Solid State Drive

Corsair - CXM 750W 80+ Bronze Certified

 

woolfman72 wrote: The computer will act like it is starting but no video output.

 In such situation I can use my multimedia keyboard ))) Pressing "play" button can start a mediaplayer. If sound is present - then Windows booted OK     But in your case (turning off the CSM causes booting problem), I guess, your SSDs should be tested in the first place (MBR partition on UEFI system?)


Edited by Dmytro_o_o - 03 Aug 2018 at 9:55pm