I'm having some serious issues with this card, and I'm not sure if it's specifically this card, or something else. Seller assures me it was working fine when removed two weeks ago. I've got conflicting conclusions based on different scenarios, so I don't really know what to think, and hoping that someone else can give me a second opinion. In this system (in sig) I've had a 5700XT, a GTX1070, an RTX3060Ti, a 2060S without any issues, crashes, etc. So, the gist of the problem is below. (TL;DR - install driver results in crash, loses boot device, need to rebuild, stuck on older drivers) DDU to remove the Nvidia drivers. Shut down. Install Vega56. Connect its three (!) 8-pin connectors. Start up. Microsoft basic display adapter. Download latest AMD drivers (20.12) Start installing. Get to where it normally flickers black as the drivers install, but it goes black, fans kick up and down, and screen goes to sleep. Restart, and get back in with basic display adapter. Think it's a fluke, and reinstall drivers. Same thing happens, but this time on restart, get this BSOD: It reads "Inaccessible_Boot_Device", restarts, and now won't get to Windows splash screen. Check BIOS. UEFI boot option missing from menu. SSD still shows up. Run windows USB and use BCDEdit to rebuild the UEFI boot entry. Try to boot in, and get this BSOD: It reads "amdkmpfd.sys" Error Code "0xc000007b". Can't get passed it with safe mode, driver signature enforcement toggle, etc. Use Windows USB to restore to restore point. Back to Windows 10, basic display adapter. --- So, things I've tried since then: CMOS reset to remove OC Manually installing latest driver infs Fresh windows install GPU BIOS switch toggle I have been able to install the drivers from 2017 (17.12) and then the 2018 drivers (18.1) and then upgrade to 18.5 all seemingly okay. If I try to install 18.9 or above, instantly crash and BSOD and etc. I don't feel it's going to be PSU related, as I'm sure that would show up under load, not when trying to install drivers. I don't feel it's going to be my hardware related, as I've been running it for a while now with other cards without any issues. I don't think it's just bad drivers, as I've never had this happen before. My conclusion is that it's a faulty card. From the sellers perspective, they had it working before they posted it to me, so they feel there's got to be something wrong with my system to be causing the issues.