You can use any adaptive sync screen like that from a modern NVIDIA card for variable refresh rates yes. The level of performance, range for VRR, quality etc can really vary though as many adaptive sync screens, especially older ones, didn’t go through much in the way of certification or validation. NVIDIA now test them all and some are awarded the “Gsync Compatible” certification if they pass certain tests. This screen hasn’t though
https://www.nvidia.com/en-us/geforce/products/g-sync-monitors/specs/
although having said that, if you’ve used it fine already and without issue, I’d expect it to behave basically as well on the NVIDIA card anyway
