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GeForce 8800 GTX vs Radeon HD 6950 2GB

Intro

The GeForce 8800 GTX features a GPU core clock speed of 575 MHz, and the 768 MB of GDDR3 RAM runs at 900 MHz through a 384-bit bus. It also features 128 Stream Processors, 64 Texture Address Units, and 24 ROPs.

Compare those specs to the Radeon HD 6950 2GB, which features clock speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 RAM. It features 1408 SPUs as well as 88 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTX 155 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 45 Watts (29%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB should be 85% quicker than the GeForce 8800 GTX overall, because of its greater data rate. (explain)

Radeon HD 6950 2GB 160000 MB/sec
GeForce 8800 GTX 86400 MB/sec
Difference: 73600 (85%)

Texel Rate

The Radeon HD 6950 2GB is quite a bit (more or less 91%) more effective at AF than the GeForce 8800 GTX. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
GeForce 8800 GTX 36800 Mtexels/sec
Difference: 33600 (91%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6950 2GB is the winner, by a large margin. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
GeForce 8800 GTX 13800 Mpixels/sec
Difference: 11800 (86%)

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 GTX

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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 GTX Radeon HD 6950 2GB
Manufacturer nVidia AMD
Year Nov 2006 December 2010
Code Name G80 Cayman Pro
Memory 768 MB 2048 MB
Core Speed 575 MHz 800 MHz
Memory Speed 1800 MHz 5000 MHz
Power (Max TDP) 155 watts 200 watts
Bandwidth 86400 MB/sec 160000 MB/sec
Texel Rate 36800 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 128 1408
Texture Mapping Units 64 88
Render Output Units 24 32
Bus Type GDDR3 GDDR5
Bus Width 384-bit 256-bit
Fab Process 90 nm 40 nm
Transistors 681 million 2640 million
Bus PCIe x16 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 (in units of megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high 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 texture units by the core speed of the chip. The higher the texel rate, the better the graphics 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 could possibly record to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

Hide Prices

GeForce 8800 GTX

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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.

Comments

One Response to “GeForce 8800 GTX vs Radeon HD 6950 2GB”
Ctsephion says:

Wow, quite the upgrade!

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