This run was at 5.4ghz all core. I didn't do process shutdowns or anything. 24/7 is 5.1ghz all core. I did this mostly see if I could. If I tweaked I could get a lot higher.
You can see the tab on this motherboard. It locks into the little hook at end of video card pcie slot tab. So the only other think that can hold it is at back of case. Can't for 100% see but it looks like the blank tab is over the gpu bracket at end of case. If that bracket is free and that plastic lock is pushed out of way the card should come out.
There is a holding tab you can see at backside of card. I attached a picture with it circled and direction to move it. Using something non conductive and not sharp move it then pull card out.
First post so lets make it a good one.
Disclaimer: These 2 results were not from a stable tested system. This system is stable at 5.2 no avx max temp prime95 74degrees.
This was just to see if one system would post at 5.3ghz, Then was why not try and post at 5.4ghz.
Benchmark: Time Spy
CPU: I9 9900KF - direct die
GPU: 2080 TI Kingpin
GPU: Core 2190 MHz
GPU: Memory 2056 MHz
Score: 16258
https://www.3dmark.com/spy/7927285
Pushed alittle more, currently my ram is holding me back for any higher. Stuck with ddr4 3600 16-18-18-36
Score: 16309
https://www.3dmark.com/spy/7927511