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GeForce 8800 GTS (G80) 640MB vs Radeon HD 6750

Intro

The GeForce 8800 GTS (G80) 640MB features clock speeds of 513 MHz on the GPU, and 792 MHz on the 640 MB of GDDR3 memory. It features 96 SPUs as well as 48 TAUs and 20 Rasterization Operator Units.

Compare those specs to the Radeon HD 6750, which uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 memory runs at a speed of 1000 MHz on this model. It features 720 SPUs along with 36 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750 86 Watts
GeForce 8800 GTS (G80) 640MB 143 Watts
Difference: 57 Watts (66%)

Memory Bandwidth

The Radeon HD 6750 should in theory perform a little bit faster than the GeForce 8800 GTS (G80) 640MB overall. (explain)

Radeon HD 6750 64000 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 640 (1%)

Texel Rate

The Radeon HD 6750 should be a bit (about 6%) faster with regards to AF than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 6750 26100 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 1476 (6%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6750 is a better choice, though only just barely. (explain)

Radeon HD 6750 11600 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 1340 (13%)

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) 640MB

Amazon.com

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Radeon HD 6750

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) 640MB Radeon HD 6750
Manufacturer nVidia AMD
Year Nov 2006 (640) January 2011
Code Name G80 Juniper Pro
Memory 640 MB 512 MB
Core Speed 513 MHz 725 MHz
Memory Speed 1584 MHz 4000 MHz
Power (Max TDP) 143 watts 86 watts
Bandwidth 63360 MB/sec 64000 MB/sec
Texel Rate 24624 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 96 720
Texture Mapping Units 48 36
Render Output Units 20 16
Bus Type GDDR3 GDDR5
Bus Width 320-bit 128-bit
Fab Process 90 nm 40 nm
Transistors 681 million 1040 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.0

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of megabytes per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster 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 applied per second. This is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 6750

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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