I have a Dell XPS 8900 i5-6500, 750w PSU, 32GB RAM, Win11 Pro, I am trying to upgrade the GPU to Radeon R9 270 2GB DDR5, everything powers on, the PC and the GPU, fan spinning, but there is no video output, I tried to do it on other GPU with similar specs, also blank screen despite powering up, I also tried to disable secure boot in BIOS and uninstalled current GPU driver, still nothing, both GPUs I tried to install are tested and working on other computers, when I installed back the original GPU, it works fine, don't know what else to do.