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GeForce 8800 GTX vs Radeon HD 5830

Intro

The GeForce 8800 GTX comes with a core clock frequency of 575 MHz and a GDDR3 memory frequency of 900 MHz. It also uses a 384-bit memory bus, and makes use of a 90 nm design. It is made up of 128 SPUs, 64 Texture Address Units, and 24 Raster Operation Units.

Compare those specifications to the Radeon HD 5830, which makes use of a 40 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM is set to run at a speed of 1000 MHz on this card. It features 1120(224x5) SPUs as well as 56 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8800 GTX 155 Watts
Radeon HD 5830 175 Watts
Difference: 20 Watts (13%)

Memory Bandwidth

In theory, the Radeon HD 5830 should be a lot faster than the GeForce 8800 GTX in general. (explain)

Radeon HD 5830 128000 MB/sec
GeForce 8800 GTX 86400 MB/sec
Difference: 41600 (48%)

Texel Rate

The Radeon HD 5830 should be much (more or less 22%) faster with regards to texture filtering than the GeForce 8800 GTX. (explain)

Radeon HD 5830 44800 Mtexels/sec
GeForce 8800 GTX 36800 Mtexels/sec
Difference: 8000 (22%)

Pixel Rate

The GeForce 8800 GTX will be a little bit (about 8%) better at AA than the Radeon HD 5830, and will be able to handle higher screen resolutions more effectively. (explain)

GeForce 8800 GTX 13800 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 1000 (8%)

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

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Radeon HD 5830

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 GTX Radeon HD 5830
Manufacturer nVidia AMD
Year Nov 2006 February 25, 2010
Code Name G80 Cypress LE
Memory 768 MB 1024 MB
Core Speed 575 MHz 800 MHz
Memory Speed 1800 MHz 4000 MHz
Power (Max TDP) 155 watts 175 watts
Bandwidth 86400 MB/sec 128000 MB/sec
Texel Rate 36800 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 13800 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 128 1120(224x5)
Texture Mapping Units 64 56
Render Output Units 24 16
Bus Type GDDR3 GDDR5
Bus Width 384-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 max amount of information (counted in megabytes per second) that can be moved past 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 type RAM, it should be multiplied by 2 once again. If 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 number of texture map elements (texels) that can be processed per second. This figure 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few 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 8800 GTX

Amazon.com

Check prices at:

Radeon HD 5830

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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