Sexisforsinners

RTX is a pretty new series of GPU, try an older driver or a new one for it, maybe even fiddle with the CPU drivers and see what combination works. Sounds like the glitches are artefacts, so the GPU is probbably faulty or you're pushing it too far. If you have your previous GPU: try it and see if it still does the same thing, if it doesn' then the RTX card is faulty 

I know not the best but look for something with a decent CPU and APU, trust me it hurts more to not have enough to game than to have and not use the power