I've got a weird one for you. Now, I normally solve my own issues. I've been building computers from parts for 24 years. I've been working professionally in computer support for 16, 3 of that as a systems admin. I have not been able to figure this one out.
I updated my bios to the latest F4 for the X79-UP4 using the @BIOS utility. Suddenly, my screen saver, or the monitor power saver, would not kick on. I tried unplugging the keyboard, mouse, and Razer Nostromo, but still no good. I unplugged all my USB devices, still no good. I formatted my main OS drive and reinstalled the OS, and even fresh out of the OS install, with no other device drivers installed, the screen saver still would not kick on. I tried resetting the BIOS settings back to defaults, changing only the boot order and turning off the on-board sound, and still no good.
I'm at my wits end. Any ideas?
(Other hardware: Core i7 3930k, GSkill Trident X 32GB memory, EVGA Geforce GTX680, Sound Blaster Z, OCZ Vertex 4 256GB main drive in port 1, OCZ Vertex 4 128GB drive for games on port 2, Mushkin 60GB SSD on port 3 for swap file, Seagate 2TB drive for storage on port 4, LG BluRay burner on port 5. Keyboard is Logitech G510, Logitech G700 mouse, Razer Nostromo, USB 3.0 2TB external hard drive for backups. HP ZR2740w monitor. in case any of that matters.)