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GeForce 8800 GTS (G80) 640MB vs Radeon HD 5850

Intro

The GeForce 8800 GTS (G80) 640MB has clock speeds of 513 MHz on the GPU, and 792 MHz on the 640 MB of GDDR3 RAM. It features 96 SPUs along with 48 Texture Address Units and 20 ROPs.

Compare those specifications to the Radeon HD 5850, which features core speeds of 725 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1440(288x5) SPUs along with 72 TAUs and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTS (G80) 640MB 143 Watts
Radeon HD 5850 151 Watts
Difference: 8 Watts (6%)

Memory Bandwidth

As far as performance goes, the Radeon HD 5850 should theoretically be a lot better than the GeForce 8800 GTS (G80) 640MB in general. (explain)

Radeon HD 5850 128000 MB/sec
GeForce 8800 GTS (G80) 640MB 63360 MB/sec
Difference: 64640 (102%)

Texel Rate

The Radeon HD 5850 will be quite a bit (about 112%) faster with regards to anisotropic filtering than the GeForce 8800 GTS (G80) 640MB. (explain)

Radeon HD 5850 52200 Mtexels/sec
GeForce 8800 GTS (G80) 640MB 24624 Mtexels/sec
Difference: 27576 (112%)

Pixel Rate

The Radeon HD 5850 will be quite a bit (more or less 126%) faster with regards to full screen anti-aliasing than the GeForce 8800 GTS (G80) 640MB, and also able to handle higher resolutions better. (explain)

Radeon HD 5850 23200 Mpixels/sec
GeForce 8800 GTS (G80) 640MB 10260 Mpixels/sec
Difference: 12940 (126%)

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 5850

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 5850
Manufacturer nVidia AMD
Year Nov 2006 (640) September 30, 2009
Code Name G80 Cypress PRO
Memory 640 MB 1024 MB
Core Speed 513 MHz 725 MHz
Memory Speed 1584 MHz 4000 MHz
Power (Max TDP) 143 watts 151 watts
Bandwidth 63360 MB/sec 128000 MB/sec
Texel Rate 24624 Mtexels/sec 52200 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 23200 Mpixels/sec
Unified Shaders 96 1440(288x5)
Texture Mapping Units 48 72
Render Output Units 20 32
Bus Type GDDR3 GDDR5
Bus Width 320-bit 256-bit
Fab Process 90 nm 40 nm
Transistors 681 million 2154 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the 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 - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 8800 GTS (G80) 640MB

Amazon.com

Check prices at:

Radeon HD 5850

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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