GeForce GTX 645 vs Radeon HD 7770

Speed and memory

The GeForce GTX 645 and the Radeon HD 7770 are within a few percent of each other for gaming in our model, so you will not see a difference in play.

Both cards have 1 GB of video memory, so memory will not separate them.

In our estimates for popular games at 1080p on High, the biggest gap is in Fortnite (29 against 29 fps), and the smallest is in ELDEN RING (6 against 6 fps). Games that are light enough to run above 200 fps on both cards show little difference at all.

Power and value

The GeForce GTX 645 is rated at 65 W and the Radeon HD 7770 at 80 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 GTX 645 if you want the faster card, and it also has at least as much memory. It makes the most sense at 1440p and above, or on a monitor with a high refresh rate.

Choose the Radeon HD 7770 if the price gap matters more than the small speed difference. Whichever you pick, check reviews for the games you play, because two cards with similar scores can differ in individual titles.