
This is under bootcamp Windows 8 Pro 圆4 (same drivers, same OS as my desktop). I have a MacBook Air 13", It also has a HD4000 but it can run everything without problems even with vsync disabled. With vsync enabled, it can take any load but as soon something is without vsync the complete system freezes. I'm going to test my CPU in another PC to see if it is my CPU or the motherboard. Whenever a game or benchmark uses vsync there is no problem but as soon as I disable vsync the complete system freezes. I was able to point the problem to vsync. (I tried everything) (most of the time I tested everything on default (everything should work then right?)) (set it 1,2V max, RAM: 1,65v) I've tried different allocations of RAM for the iGPU, I disabled Render standby. I have tested every option in the BIOS for voltage of iGPU, CPU, DRAM.


What can I do to fix this problem? Is it normal that a GTX 680 can't boot in UEFI?īIOS is 1309 (as stated in FP) I have changed the RAM (booted with 1 stick, in different slots, took other RAM (from other PC)) Still the same problem. (I can restart and change the setting back to normal BIOS but I bought this UEFI board for a reason). The installer copy's everything but then on the first reboot I see the ROG logo a little while and after that a continuous loop of little flashes of my screen going on (which is a black screen anyway it seems) and dark again (same case with the LED's on my keyboard). So now I can boot into my EFI Windows 8 USB installer. So I pulled out the card and went on with the integrated HD4000.

The first problem is that apparently my VGA card (GTX 680) is not supported in UEFI mode (?). Then I set my CSM setting to disabled (this is needed to boot in UEFI). So I made a USB with Windows 8 EFI (this works) (formatted as GPT). Samsung 830 256GB SSD (latest firmware) (formatted as GPT) With Windows 8 out now I bought it and wanted to install it on my system but I wanted to install it in UEFI to have all the benefits like secure boot and stuff.
