As already said I bought a used Dell GPU 315W. According to the seller who carried both a model named 4FCWX and one named VX372 there is no perceivable difference aside from the name. I got the second.   As we already know, both the clips on the bottom and the screwholes are completely different from the original gpu. Also the 315W is a bit longer. I was worried, but it turns out that it fits snugly in the case - since I don't think there will be any problems even without screws.   The gpu has three connectors - two to the mainboard as the other one and one 6-Pin - the additional one I needed for my gpu. So i tried to connect it. It worked instantly. Linux recognizes the gpu as Radeon R7 260X/360. A benchmark - GPU Drawing - went from 6251 to 20390.   This was some minutes ago. I still have to test if there are any problems with more challenging real life applications and longer use. But even then my initial problem is solved. Thanks for the discussion and have a great weekend.
Hello, I recently bought a used OptiPlex 7040. I would like to upgrade it with a PSU 300W (providing a 6-pin power connector for the GPU). I did not find a list of compatible options anywhere. I should be grateful for any hints which PSUs fit those specs.
300W PSU in Optiplex 7040 SFF?