Speed and memory
In our performance index the GeForce GTX 670 scores 4.8 and the Intel Arc 140V (integrated) scores 4.5, which makes the GeForce GTX 670 about 7% faster. That is a small gap, below what most people notice without a frame counter.
The GeForce GTX 670 has 2 GB of video memory and the Intel Arc 140V (integrated) has shared GB. That is a small difference and unlikely to decide anything.
In our estimates for popular games at 1080p on High, the biggest gap is in Cyberpunk 2077 (8 against 14 fps), and the smallest is in Fortnite (58 against 55 fps). Games that are light enough to run above 200 fps on both cards show little difference at all.