Hi,
I am struggling with my Crosshair IV Formula. Almost everytime i want to start my PC it says
"NEW CPU INSTALLED - F1 for Setup - F2 for Default".
I tried everything i know till now... nothing helps... the only "helping" thing is to disable "Wait for F1" at boot.
But then it starts without OC, and i bought this CPU and board for OC (with 3,6GHz the cpu temp is 49°C max.).
Sometimes booting will work (only 1 out of 10-15 tries), but that is annoying.
Does anyone know what i should try to fix this? All ideas will be tested by me (even if i did try them once).
The things i tried:
- Flash BIOS to every version i can get.
- Change PSU
- Change RAM
- No OC --> default settings
- Stock CPU-Cooler
- unplug fans from mainboard
- unplug SATA-Devices from MB
- unplug everything else (only used mouse+keyboard+graphics card+power-cables+RAM+CPU+cooler)
- try a new CPU (also a 1090T BE --> both run @3,6GHz on a C5F-Z without problems)
- change BIOS battery
- reflow the northbridge and southbridge (worked good for notebooks when display or sata-devices are not recognized)
- clean the board behind the cpu-cooler mount (glue from Antec kühler 620)
- sand down the corners (and the central rectangle) of the cpu-socket to make it flat:
LINKThe Things i didn't try:
- Change BIOS-Chip (will cost about 10€?)
- Dismantle the CPU-Socket again and process the CPU contacts with "contact spray".
BIG THANKS in avance for any hint!
