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GeForce 9800 GTX vs Radeon HD 6950

Intro

The GeForce 9800 GTX has core clock speeds of 675 MHz on the GPU, and 1100 MHz on the 512 MB of GDDR3 memory. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Compare those specs to the Radeon HD 6950, which comes with a GPU core clock speed of 800 MHz, and 1024 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also features 1408 SPUs, 88 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GTX 140 Watts
Radeon HD 6950 200 Watts
Difference: 60 Watts (43%)

Memory Bandwidth

The Radeon HD 6950 should in theory perform a lot faster than the GeForce 9800 GTX overall. (explain)

Radeon HD 6950 160000 MB/sec
GeForce 9800 GTX 70400 MB/sec
Difference: 89600 (127%)

Texel Rate

The Radeon HD 6950 is a lot (approximately 63%) better at anisotropic filtering than the GeForce 9800 GTX. (explain)

Radeon HD 6950 70400 Mtexels/sec
GeForce 9800 GTX 43200 Mtexels/sec
Difference: 27200 (63%)

Pixel Rate

The Radeon HD 6950 should be much (more or less 137%) better at AA than the GeForce 9800 GTX, and also able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6950 25600 Mpixels/sec
GeForce 9800 GTX 10800 Mpixels/sec
Difference: 14800 (137%)

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 9800 GTX

Amazon.com

Check prices at:

Radeon HD 6950

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 9800 GTX Radeon HD 6950
Manufacturer nVidia AMD
Year April 2008 December 2010
Code Name G92 Cayman Pro
Memory 512 MB 1024 MB
Core Speed 675 MHz 800 MHz
Memory Speed 2200 MHz 5000 MHz
Power (Max TDP) 140 watts 200 watts
Bandwidth 70400 MB/sec 160000 MB/sec
Texel Rate 43200 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 128 1408
Texture Mapping Units 64 88
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 754 million 2640 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (counted in MB per second) that can be moved across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce 9800 GTX

Amazon.com

Check prices at:

Radeon HD 6950

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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