Originally Posted by sugarhell
memory bus =/= memory controller. There isnt a programmable voltage control at all in the 290x ref pcb
Thanks, but what exactly is the core voltage doing to the memory?
As I explained in my long post above, using default voltage (0.961 or 0.956 fluctuating) at 1500 MHz memory causes black screen to happen as soon as there is any 2D load (which causes the memory clocks to jump from 150 to 1500=this jump causes the crash as the memory/whatever is unstable). But if you lock the memory clocks at 3D speeds, on the desktop (ilke on a 144hz monitor@144hz), instead of black screening, you see massive horizontal flickering. Raise the core voltage while its happening and it instantly stabilizes.