Problem with CUDA Nvidea RTX2080ti & Premiere 2020

Might be this issue:

FAQ: How to solve low-level exception error after updating to PP 14.1

Actually, the "DUAL" in the graphics card's name is misleading. The OP actually has only a single GPU in that system. The "DUAL" in the card's name merely advertises the fact that that Asus card simply has two fans, unlike some RTX 2080 Ti cards that have three or more fans.

And although 4 GB per core is somewhat less than ideal, there might be even more problems with more RAM installed. That's because of the way memory controllers work. You see, memory controllers work best with only two ranks of memory per channel. But with readily available DIMMs, 64 GB in a dual-channel memory controller would require 4 ranks of memory per channel. And then, some memory controllers will cut the memory controller's clock speed (and thus total throughput) significantly when more than two ranks per channel are occupied. In fact, I have seen modern memory controllers that technically support DDR4-3600 memory with only two sticks will reduce that all the way down to DDR4-2133 maximum with four sticks. No wonder why some PCs actually perform worse with 64 GB than with 32 GB. Conversely, using only one rank per channel will result in the failure of the memory controller to be utilized to its fullest (and here is where systems with only 16 GB of RAM using modern single-ranked DIMMs will underperform otherwise identical systems with 32 GB of RAM using the very same RAM chips but in a dual-ranked configuration because the memory controller, which assumes that double-ranked DIMMs are used in each channel, will treat single-ranked DIMMs as having only 32 bits per channel when it's really a 64-bit memory channel).

And unfortunately, 32 GB DIMMs are still much more expensive (on a per-GB basis) and harder to find than 16 GB DIMMs.