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GeForce 8600 GT 512MB DDR2 vs Radeon HD 4830 1GB

Intro

The GeForce 8600 GT 512MB DDR2 has a GPU clock speed of 540 MHz, and the 512 MB of DDR2 RAM is set to run at 400 MHz through a 128-bit bus. It also features 32 Stream Processors, 16 TAUs, and 8 ROPs.

Compare all of that to the Radeon HD 4830 1GB, which features core clock speeds of 575 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR4 RAM. It features 640(128x5) SPUs as well as 32 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
Radeon HD 4830 1GB 95 Watts
Difference: 48 Watts (102%)

Memory Bandwidth

In theory, the Radeon HD 4830 1GB is 350% faster than the GeForce 8600 GT 512MB DDR2 in general, because of its greater bandwidth. (explain)

Radeon HD 4830 1GB 57600 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 44800 (350%)

Texel Rate

The Radeon HD 4830 1GB will be a lot (about 113%) faster with regards to AF than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 4830 1GB 18400 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 9760 (113%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 4830 1GB is the winner, and very much so. (explain)

Radeon HD 4830 1GB 9200 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 4880 (113%)

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 8600 GT 512MB DDR2

Amazon.com

Check prices at:

Radeon HD 4830 1GB

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 8600 GT 512MB DDR2 Radeon HD 4830 1GB
Manufacturer nVidia AMD
Year April 2007 Oct 21, 2008
Code Name G84 RV770 LE
Memory 512 MB 1024 MB
Core Speed 540 MHz 575 MHz
Memory Speed 800 MHz 1800 MHz
Power (Max TDP) 47 watts 95 watts
Bandwidth 12800 MB/sec 57600 MB/sec
Texel Rate 8640 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 32 640(128x5)
Texture Mapping Units 16 32
Render Output Units 8 16
Bus Type DDR2 GDDR4
Bus Width 128-bit 256-bit
Fab Process 80 nm 55 nm
Transistors 289 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: Bandwidth is the max amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This is calculated by multiplying the total 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 maximum amount of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill 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 max fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

Radeon HD 4830 1GB

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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