GeForce GT 630 vs GeForce GT 640

Speed and memory

The GeForce GT 630 and the GeForce GT 640 are within a few percent of each other for gaming in our model, so you will not see a difference in play.

The GeForce GT 630 has 1 GB of video memory and the GeForce GT 640 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 Grand Theft Auto V Legacy (16 against 23 fps), and the smallest is in Grand Theft Auto V Legacy (16 against 23 fps). Games that are light enough to run above 200 fps on both cards show little difference at all.

Power and value

The GeForce GT 630 is rated at 65 W and the GeForce GT 640 at 65 W. With a mid-range processor that means a power supply of about 450 W for the first and 450 W for the second. The power draw is close enough that cooling and noise will be similar.

We do not have launch prices for both cards, so we cannot compare value. Check current listings for both.

Which one to buy

Choose the GeForce GT 630 if you want the faster card, and you can accept 1 GB of memory. It makes the most sense at 1440p and above, or on a monitor with a high refresh rate.

Choose the GeForce GT 640 if the price gap matters more than the small speed difference, and you value the extra video memory. Whichever you pick, check reviews for the games you play, because two cards with similar scores can differ in individual titles.