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GeForce 8800 GTS (G80) 320MB vs Radeon HD 7970

Intro

The GeForce 8800 GTS (G80) 320MB features clock speeds of 513 MHz on the GPU, and 792 MHz on the 320 MB of GDDR3 RAM. It features 96 SPUs along with 48 Texture Address Units and 20 Rasterization Operator Units.

Compare those specs to the Radeon HD 7970, which features core speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 320MB 143 Watts
Radeon HD 7970 250 Watts
Difference: 107 Watts (75%)

Memory Bandwidth

In theory, the Radeon HD 7970 will be 317% quicker than the GeForce 8800 GTS (G80) 320MB overall, because of its greater bandwidth. (explain)

Radeon HD 7970 264000 MB/sec
GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Difference: 200640 (317%)

Texel Rate

The Radeon HD 7970 is quite a bit (about 381%) better at AF than the GeForce 8800 GTS (G80) 320MB. (explain)

Radeon HD 7970 118400 Mtexels/sec
GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Difference: 93776 (381%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7970 is a better choice, by a large margin. (explain)

Radeon HD 7970 29600 Mpixels/sec
GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Difference: 19340 (188%)

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 (G80) 320MB

Amazon.com

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Radeon HD 7970

Amazon.com

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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 (G80) 320MB Radeon HD 7970
Manufacturer nVidia AMD
Year Feb 2007 January 2012
Code Name G80 Tahiti XT
Memory 320 MB 3072 MB
Core Speed 513 MHz 925 MHz
Memory Speed 1584 MHz 5500 MHz
Power (Max TDP) 143 watts 250 watts
Bandwidth 63360 MB/sec 264000 MB/sec
Texel Rate 24624 Mtexels/sec 118400 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 96 2048
Texture Mapping Units 48 128
Render Output Units 20 32
Bus Type GDDR3 GDDR5
Bus Width 320-bit 384-bit
Fab Process 90 nm 28 nm
Transistors 681 million 4313 million
Bus PCIe x16 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 maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 7970

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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