Asus P8Z68-V PRO red RAM-light, no boot

[Jurge92]

Today I upgraded my RAM on my Asus P8Z68-V PRO motherboard from 4GB(Corsair XMS3 2x2GB) to 8GB(Corsair Vengeance 2x4GB). The PC was working perfectly today until I changed the RAM. The PC started up with all fans running, but black screen/no signal. I tried putting the RAM in and out several times to see if that was the problem, but nothing changed. I noticed the red light next to the RAM were light. I then tried switching back to the old RAM, that worked just an hour before, but no... The exact same problem. After reading around the web, I found out clicking on the memOK! button would help. I pushed it down for three second(as advised) until the light stopped, then restart, the red light started flashing, then restart again after some time, but same problem. Everything runs in the case, but no signal on screen(the screen/cables is not the problem...).

Can anyone help?

 

[LoveMachine]

Try a single stick of each type of RAM (not at the same time), i.e. single channel, and see if it will POST. If it does, you can go into BIOS and try lowering the default memory speeds or timings to see if that helps. Asus boards seem to be finicky with memory. I've had 2 Z77 boards that didn't like running in certain configurations. I'm too lazy to check, but are your Corsair sticks on the VQL list?

 

[Jurge92]

They are fully compitable, double checked. But I got it working. The problem was I hadn't pushed them hard enough, because I didn't want to damage the board.

 

[BonzaiDuck]

They are fully compitable, double checked. But I got it working. The problem was I hadn't pushed them hard enough, because I didn't want to damage the board.

You mean they didn't go into the slots completely. OK.

Suggest you set the new RAM to the manufacturer spec as soon as you can get into BIOS, then run the latest HCI-Memtest from the self-booting CD you can burn to confirm they are running without flaw.