So I can't say anything really except that I ran memtest86 successfully on all of them and that they are not on Asus' supported RAM list. I have tried putting only a single RAM stick in different slots and had the same results. I got a Radeon HD 6870 from a friend of mine and had the same experience as with the 660ti, except IĬouldn't even install the Catalyst driver, it will freeze to a bluescreen/black screen at about half the installation process. # update BIOS to most recent version 0901 I have a Live-USB Linux ready with some 3D-games on it, it shows the same results, first slow-down then total crash I did a clean Windows 8.1 64 install with just the NVIDIA driver and the diagnostic software

Recovering from some of the crashes, none of them changed the slow-down and crash I tried a version 34x.xx, a version 353.xx and the most recent version 355.82. I installed the driver (for HD graphics 530) properly. The integrated GPU runs fine and will benchmark/run games etc. Only GPU-bound applications, even Unity-based games will cause crashing. If I stay in desktop and run some Prime95 or anything, it will run just fine. # the system crashes to a bluescreen with the message 'driver irql not less or equal' # the driver crashes, Windows recovers from it, Windows is stuttering for the rest of the time in half the cases. If there is a 660Ti in one of the PCIE slots, and once I start a game/benchmark, it will run for a certain amount of time, then fps drop rapidly Maybe someone here can see a pattern or notices something I am missing. I have a very strange problem with my Asus Z170-A and I cannot find the cause of this whatsoever.

Cpu z asus crashing computers