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GeForce 8600 GT 512MB DDR2 vs Radeon HD 4870 512MB

Intro

The GeForce 8600 GT 512MB DDR2 uses a 80 nm design. nVidia has set the core frequency at 540 MHz. The DDR2 memory works at a speed of 400 MHz on this card. It features 32 SPUs along with 16 TAUs and 8 ROPs.

Compare those specifications to the Radeon HD 4870 512MB, which comes with a core clock frequency of 750 MHz and a GDDR5 memory speed of 900 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
Radeon HD 4870 512MB 150 Watts
Difference: 103 Watts (219%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4870 512MB will be 800% quicker than the GeForce 8600 GT 512MB DDR2 overall, due to its greater bandwidth. (explain)

Radeon HD 4870 512MB 115200 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 102400 (800%)

Texel Rate

The Radeon HD 4870 512MB should be quite a bit (more or less 247%) better at AF than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 4870 512MB 30000 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 21360 (247%)

Pixel Rate

The Radeon HD 4870 512MB should be quite a bit (more or less 178%) faster with regards to anti-aliasing than the GeForce 8600 GT 512MB DDR2, and should be able to handle higher resolutions more effectively. (explain)

Radeon HD 4870 512MB 12000 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 7680 (178%)

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 4870 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 8600 GT 512MB DDR2 Radeon HD 4870 512MB
Manufacturer nVidia AMD
Year April 2007 Jun 25, 2008
Code Name G84 RV770 XT
Memory 512 MB 512 MB
Core Speed 540 MHz 750 MHz
Memory Speed 800 MHz 3600 MHz
Power (Max TDP) 47 watts 150 watts
Bandwidth 12800 MB/sec 115200 MB/sec
Texel Rate 8640 Mtexels/sec 30000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 12000 Mpixels/sec
Unified Shaders 32 800(160x5)
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type DDR2 GDDR5
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 largest amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

Radeon HD 4870 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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