Thanks, but as I said, the card doesn't work, the PC won't boot, which is probably due to the power supply. I installed a gtx 580 as an interim solution and it works.

I would advise you to get a better model if you have an Intel i7 installed (I have a GTX 1060 and am very satisfied). Generally, there should not be any compatibility problems with graphics cards or PCI Express. Consider the power of the power supply and the size of the card. Good luck!