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GeForce 8800 GTS (G92) vs Radeon HD 7770

Intro

The GeForce 8800 GTS (G92) comes with core clock speeds of 650 MHz on the GPU, and 970 MHz on the 512 MB of GDDR3 RAM. It features 128 SPUs along with 64 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon HD 7770, which comes with a clock frequency of 1000 MHz and a GDDR5 memory frequency of 1125 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7770 80 Watts
GeForce 8800 GTS (G92) 135 Watts
Difference: 55 Watts (69%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7770 should perform a bit faster than the GeForce 8800 GTS (G92) overall. (explain)

Radeon HD 7770 72000 MB/sec
GeForce 8800 GTS (G92) 62080 MB/sec
Difference: 9920 (16%)

Texel Rate

The GeForce 8800 GTS (G92) should be a bit (about 4%) more effective at texture filtering than the Radeon HD 7770. (explain)

GeForce 8800 GTS (G92) 41600 Mtexels/sec
Radeon HD 7770 40000 Mtexels/sec
Difference: 1600 (4%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7770 is the winner, by far. (explain)

Radeon HD 7770 16000 Mpixels/sec
GeForce 8800 GTS (G92) 10400 Mpixels/sec
Difference: 5600 (54%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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GeForce 8800 GTS (G92)

Amazon.com

Check prices at:

Radeon HD 7770

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce 8800 GTS (G92) Radeon HD 7770
Manufacturer nVidia AMD
Year Dec 2007 February 2012
Code Name G92 Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 650 MHz 1000 MHz
Memory Speed 1940 MHz 4500 MHz
Power (Max TDP) 135 watts 80 watts
Bandwidth 62080 MB/sec 72000 MB/sec
Texel Rate 41600 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 10400 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 128 640
Texture Mapping Units 64 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 256-bit 128-bit
Fab Process 65 nm 28 nm
Transistors 754 million 1500 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G92)

Amazon.com

Check prices at:

Radeon HD 7770

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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