JackOfOwls

Success! In the BIOS of my Asus Sabertooth z87, I set both "USB Legacy Support" & "Intel xHCI mode" to "Auto" and disabled "EHCI Hand-off" and now my computer boots normally with my RGB K95 and the keyboard no longer gets locked out before Windows is loaded. You also might want to disable "Fast Boot" though it appears that the "EHCI Hand-off" was the culprit all along on my system. Here's a BIOS screen capture of my now working config:161029145238.BMP

Did anyone ever find a fix for this, short of disabling Intel xHCI in BIOS (which I DO NOT want to do since it causes stability issues)? I had an Asus P8Z77- V PRO motherboard with the z77 chipset and had no issues whatsoever with my Corsair RGB K90 keyboard (latest firmware and software) with boot delays or getting into the BIOS. But since upgrading to an Asus Sabertooth z87 motherboard with latest BIOS I get terrible boot delays and can't access my BIOS 90% of the time. It's INCREDIBLY annoying that I now have to use another USB keyboard just to get into my BIOS. Why wasn't this issue fixed in a firmware update? Is there a workaround? I tried all solutions in this topic and the only one that works is disabling Intel xHCI. Not acceptable.

Having just purchased the K95 RGB I am quite impressed with its brightness level at the highest setting. For years I had only LED-strip type keyboard lighting illumination with crappy membrane keys. I wonder if having the LEDS on their brightest settings shortens their life though. I had an old Saitek(my first backlit keyboard) that seemed to get dimmer & dimmer in the two or three year period I had it. I hope to never go back to these old devices.