HD 7770

We tested the HD 7770 with the most demanding DX11 around at 1080p, and with the Heaven 2.5 benchmark at 2560 x 1600 to really test its limits. It fared reasonably, demonstrating why it's more expensive than the HD 7750 and keeping in the same ball park as the pricier but older HD 6850.

DirectX 11 tessellation performance: Frames per second: Higher is betterHeaven 2.5

AMD HD 7770: 11.9
AMD HD 6850: 12.5
EVGA GTX 550 Ti: 8.9

DirectX 11 gaming performance: Frames per second: Higher is better

DiRT 3

AMD HD 7770: 41.73
AMD HD 7750: 28.64
AMD HD 6850: 42.62

Shogun 2

AMD HD 7770: 30.77
AMD HD 7750: 20.33
AMD HD 6850: 31.86

Metro 2033

AMD HD 7770: 13.00
AMD HD 7750: 11.67
AMD HD 6850: 15.67

Just Cause 2

AMD HD 7770: 31.18
AMD HD 7750: 26.13
AMD HD 6850: 34.14