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GeForce 8800 GT 1GB vs Radeon HD 4830 512MB

Intro

The GeForce 8800 GT 1GB makes use of a 65 nm design. nVidia has set the core frequency at 600 MHz. The GDDR3 RAM runs at a frequency of 900 MHz on this card. It features 112 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon HD 4830 512MB, which has GPU core speed of 575 MHz, and 512 MB of GDDR3 RAM running at 900 MHz through a 256-bit bus. It also is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
GeForce 8800 GT 1GB 105 Watts
Difference: 10 Watts (11%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The GeForce 8800 GT 1GB should be a lot (approximately 83%) better at AF than the Radeon HD 4830 512MB. (explain)

GeForce 8800 GT 1GB 33600 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 15200 (83%)

Pixel Rate

The GeForce 8800 GT 1GB should be a bit (approximately 4%) better at anti-aliasing than the Radeon HD 4830 512MB, and should be capable of handling higher screen resolutions while still performing well. (explain)

GeForce 8800 GT 1GB 9600 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 400 (4%)

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 GT 1GB

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.

Specifications

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Model GeForce 8800 GT 1GB Radeon HD 4830 512MB
Manufacturer nVidia AMD
Year Dec 2007 Oct 21, 2008
Code Name G92 RV770 LE
Memory 1024 MB 512 MB
Core Speed 600 MHz 575 MHz
Memory Speed 1800 MHz 1800 MHz
Power (Max TDP) 105 watts 95 watts
Bandwidth 57600 MB/sec 57600 MB/sec
Texel Rate 33600 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 9600 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 112 640(128x5)
Texture Mapping Units 56 32
Render Output Units 16 16
Bus Type GDDR3 GDDR3
Bus Width 256-bit 256-bit
Fab Process 65 nm 55 nm
Transistors 754 million 956 million
Bus PCIe x16 2.0 PCIe 2.0 x16
DirectX Version DirectX 10 DirectX 10.1
OpenGL Version OpenGL 3.0 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8800 GT 1GB

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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