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GeForce 8800 GTS (G80) 320MB vs Radeon HD 4830 512MB

Intro

The GeForce 8800 GTS (G80) 320MB comes with a GPU clock speed of 513 MHz, and the 320 MB of GDDR3 memory is set to run at 792 MHz through a 320-bit bus. It also features 96 SPUs, 48 TAUs, and 20 Raster Operation Units.

Compare all that to the Radeon HD 4830 512MB, which comes with core speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 RAM. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
GeForce 8800 GTS (G80) 320MB 143 Watts
Difference: 48 Watts (51%)

Memory Bandwidth

The GeForce 8800 GTS (G80) 320MB, in theory, should be just a bit faster than the Radeon HD 4830 512MB overall. (explain)

GeForce 8800 GTS (G80) 320MB 63360 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 5760 (10%)

Texel Rate

The GeForce 8800 GTS (G80) 320MB is a lot (about 34%) better at texture filtering than the Radeon HD 4830 512MB. (explain)

GeForce 8800 GTS (G80) 320MB 24624 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 6224 (34%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce 8800 GTS (G80) 320MB is the winner, but only just. (explain)

GeForce 8800 GTS (G80) 320MB 10260 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 1060 (12%)

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) 320MB

Amazon.com

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Radeon HD 4830 512MB

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 GTS (G80) 320MB Radeon HD 4830 512MB
Manufacturer nVidia AMD
Year Feb 2007 Oct 21, 2008
Code Name G80 RV770 LE
Memory 320 MB 512 MB
Core Speed 513 MHz 575 MHz
Memory Speed 1584 MHz 1800 MHz
Power (Max TDP) 143 watts 95 watts
Bandwidth 63360 MB/sec 57600 MB/sec
Texel Rate 24624 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 10260 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 96 640(128x5)
Texture Mapping Units 48 32
Render Output Units 20 16
Bus Type GDDR3 GDDR3
Bus Width 320-bit 256-bit
Fab Process 90 nm 55 nm
Transistors 681 million 956 million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GTS (G80) 320MB

Amazon.com

Check prices at:

Radeon HD 4830 512MB

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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