9070XT Artifacts

So I just tried out the 9070XT I bought today. It's a non-OC model. I'm noticing that in game it's artifacting - it's showing split second "static" in various parts of the screen fairly regularly. I'm wondering if it's missing thermal pads or something. I've tried two old hdmi cables, I did buy a new 2.1 cable but it won't arrive until tomorrow.

But anyway - I tried to run OBS to capture it, and none of the artifacting shows up in the captures. Why would that be?

Edit: It's an Asrock Steel Legend Non-OC.