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GeForce 9800 GTX vs Radeon HD 6850

Intro

The GeForce 9800 GTX has 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 TAUs and 16 ROPs.

Compare those specs to the Radeon HD 6850, which comes with a core clock speed of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is made up of 960 SPUs, 48 Texture Address Units, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce 9800 GTX 140 Watts
Difference: 13 Watts (10%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6850 should be quite a bit faster than the GeForce 9800 GTX overall. (explain)

Radeon HD 6850 128000 MB/sec
GeForce 9800 GTX 70400 MB/sec
Difference: 57600 (82%)

Texel Rate

The GeForce 9800 GTX should be a small bit (about 16%) faster with regards to texture filtering than the Radeon HD 6850. (explain)

GeForce 9800 GTX 43200 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 6000 (16%)

Pixel Rate

The Radeon HD 6850 is quite a bit (more or less 130%) better at full screen anti-aliasing than the GeForce 9800 GTX, and should be able to handle higher resolutions better. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce 9800 GTX 10800 Mpixels/sec
Difference: 14000 (130%)

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 6850

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 6850
Manufacturer nVidia AMD
Year April 2008 October 2010
Code Name G92 Barts Pro
Memory 512 MB 1024 MB
Core Speed 675 MHz 775 MHz
Memory Speed 2200 MHz 4000 MHz
Power (Max TDP) 140 watts 127 watts
Bandwidth 70400 MB/sec 128000 MB/sec
Texel Rate 43200 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 10800 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 128 960
Texture Mapping Units 64 48
Render Output Units 16 32
Bus Type GDDR3 GDDR5
Bus Width 256-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 754 million 1700 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 (measured in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher 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 processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 9800 GTX

Amazon.com

Check prices at:

Radeon HD 6850

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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