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Written by David Ramsey   
Tuesday, 14 February 2012
Table of Contents: Page Index
XFX Radeon R7770 Black Edition Video Card
AMD Southern Islands GPU
Closer Look: XFX Radeon HD 7770
FX-777A-ZDSC Detailed Features
Features and Specifications
Video Card Testing Methodology
DX11: 3DMark11
DX11: Crysis 2
DX11: Batman: Arkham City
DX11: Aliens vs Predator
DX11: Lost Planet 2
DX11: Metro 2033
DX11: Unigine Heaven 2.5
XFX 7770 Super OC Temperatures
Power Consumption and Overclocking
XFX Radeon 7770 Final Thoughts
XFX R7770 Black Edition Conclusion

DX11: 3DMark11

3DMark11 is Futuremark's latest iteration of the video card software benchmark suite, building on the features of 3DMark Vantage and 3DMark 06 as well as earlier version. It's optimized and intended for testing DirectX-11 capable hardware running under Windows Vista or Windows 7.

  • 3DMark11
    • Extreme Settings, 1920x1200 resolution

3DMark Vantage offers benchmark tests focusing on GPU, CPU, and Physics performance. For this review I concentrated on the four GPU-specific tests. The first two tests take you through an undersea scene with small submarines exploring the sea floor and sunken ships. In the GT1 test, there's no tessellation, but there are extensive lighting and shadow effects. In the GT2 test, the same scene is repeated but with moderate tessellation and fewer lighting effects.

3dmark11.png

Here we see nice scaling with the NVIDIA cards. The previous generation Radeon HD6850 and HD6950 acquit themselves well, with the 6950 matching the performance of the GTX 570. The Radeon HD 7770 comes in at just under the performance of the 6850

Cost Analysis: GT1+GT2

  • $139.00 GeForce GTX 460 costs $9.86 per FPS
  • $190.00 GeForce GTX 560 costs $9.79 per FPS
  • $330.00 GeForce GTX 570 costs $14.29 per FPS
  • $135.00 Radeon HD 6850 costs $8.82 per FPS
  • $240.00 Radeon HD 6950 costs $10.26 per FPS
  • $180.00 Radeon HD 7770 costs $12.68 per FPS
  • The second pair of graphics tests explore an abandoned temple deep in a tropical jungle. The GT3 test has medium tessellation and one shadow-casting light, while the GT4 test ups the ante with heavy tessellation and many shadow-casting lights. The GT4 test is by far the most demanding of this test suite.

    3dmark11_2.png

    Cost Analysis: GT3+GT4

  • $139.00 GeForce GTX 460 costs $8.53 per FPS
  • $190.00 GeForce GTX 560 costs $8.48 per FPS
  • $330.00 GeForce GTX 570 costs $11.30 per FPS
  • $135.00 Radeon HD 6850 costs $7.58 per FPS
  • $240.00 Radeon HD 6950 costs $9.30 per FPS
  • $180.00 Radeon HD 7770 costs $10.23 per FPS
  • Test Summary: The Cape Verde GPU turns in a credible performance, almost equaling the performance of the HD6850 even though it's designed to compete at the next level down.

    Graphics Card GeForce GTX 460 GeForce GTX 560 GeForce GTX570 Radeon HD6850 Radeon HD6950 Radeon HD7770
    GPU Cores 336 384 480 960 1408 640
    Core Clock (MHz) 675 822 732 775 850 1120
    Shader Clock (MHz) 1350 1645 1464 N/A N/A N/A
    Memory Clock (MHz) 1800 2100 1900 1000 1300 1300
    Memory Amount 1GB 1GB 1280 MB GDDR5 1GB GDDR5 2GB GDDR5 1GB GDDR5
    Memory Interface 256-bit 256-bit 320-bit 256-bit 256-bit 128-bit



     

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