It's one of these, but using the zalamn flower cooler without heatpipes (bigger) I put a gpu water block on and it was fine. Swapped back. Now my whoops was.... I plugged the 2pin fan into the 2 pin HDMI audio header. (I fitted it rotated 90 degs anticlockwise, you can see how the fins would hide the header.) yeah, stupidz In my defense, the flower cooler obstructs the fan header and I didnt see it, and, the audio and fan headers are exactly the same shape connector. Anyway I plugged it in and started it up in the wrong header. I clocked the fan wasnt spinning quite quick, shut down and removed it, THEN spotted the correct header. Card isn't picked up in windows or dos (tried to use nvflash and it didnt see it either) So anything to try before this officially becomes an expensive paperweight. Thanks.