Hello,

When I boot my Dell Optiplex 9010 (running Windows 10 Pro) with a new Radeon R7 250 PCIe x16 video card, the system never provides a display (not even the POST) and appears to hang.  When I remove the new video card, the system boots normally.  I experience the exact same behavior when installing a Radeon HD 7570 PCIe x16.  Again, when I remove it, my system boots normally.

To rule out my power supply (which is 250w), I connected a Kill-a-Watt power meter to my power cord and ran Passmark's stress test and Prime95.  The highest wattage consumption value was 103w during Prime95.  That's 147w less than the max for my power supply.  I then researched Dell shipped video cards for my system, shown below:

Dell's Optiplex 9010 Driver Page
https://www.dell.com/support/home/us/en/04/product-support/product/optiplex-9010/drivers

Radeon R7 250 75W
https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+R7+250&id=2768

Radeon R5 240 50W
https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+R5+240&id=2948

Radeon HD 8570 66W
https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+HD+8570&id=2620

Radeon HD 8590 35W
https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+HD+8490&id=2841

GeForce GT 640 65W
https://www.videocardbenchmark.net/gpu.php?gpu=GeForce+GT+640&id=1432

GeForce GT 645 ??W
https://www.videocardbenchmark.net/gpu.php?gpu=GeForce+GT+645&id=2242

GeForce GTX 745 55W
https://www.videocardbenchmark.net/gpu.php?gpu=GeForce+GTX+745&id=2843

Radeon R7 240 30W
https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+R7+240&id=2713

Radeon HD 7570 44W
https://www.videocardbenchmark.net/gpu.php?gpu=Radeon+HD+7570&id=90

In my BIOS, I've configured my display setting for Auto.  I'm not sure what else to do.

Any ideas what might be causing my issue?

Thanks in advance,

Rob