Hi I bought pci riser 1x16, with usb and that molex conector I used to mine on 7950 and now I added r9 290, i put it on pcie 16 slot and i put after 7950 on prie riser, and i boot my pc and it didnt start. Tried only with r9 and it work normally, tried than with 7950 didnt work, computer didnt even start, fans of cpu, gpu didnt even start. Tried to boot if few times and reset motherboard move in and out battery. Nothing worked. And I tested it then with some other 600w gpu only r7950( I had that cpu before on that card and worked all well, after i bought golden cuz i was getting more gpus) and start computer and gpu went in flames. And now I am afraid if I buy new ones they will burn too. It stoped wroking after I used pci-e riser. Do I even need to have that molex conector in if I only use 3 cards?
I did once try just one gpu on that riser and it worked all ok. I have no idea why it burnt and first off why didnt it even boot. Temps were always 70 C, all stable and it just burn in flames and smoke.