Speed and memory
In our performance index the GeForce GTX 1630 scores 5.2 and the GeForce GTX 770 scores 5, which makes the GeForce GTX 1630 about 4% faster. That is a small gap, below what most people notice without a frame counter.
The GeForce GTX 1630 has 4 GB of video memory and the GeForce GTX 770 has 2 GB. That difference matters at 1440p and in new games at High textures, and it can outweigh a small speed advantage as the card ages.
In our estimates for popular games at 1080p on High, the biggest gap is in Red Dead Redemption 2 (20 against 11 fps), and the smallest is in Minecraft: Java Edition (98 against 95 fps). Games that are light enough to run above 200 fps on both cards show little difference at all.