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GeForce 8600 GT 512MB DDR2 vs Radeon HD 6870

Intro

The GeForce 8600 GT 512MB DDR2 features core speeds of 540 MHz on the GPU, and 400 MHz on the 512 MB of DDR2 RAM. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

Compare those specifications to the Radeon HD 6870, which comes with GPU clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 256-bit bus. It also is comprised of 1120 Stream Processors, 56 Texture Address Units, and 32 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 6870 151 Watts
Difference: 104 Watts (221%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6870 should be a lot faster than the GeForce 8600 GT 512MB DDR2 overall. (explain)

Radeon HD 6870 134400 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 121600 (950%)

Texel Rate

The Radeon HD 6870 is a lot (more or less 483%) better at anisotropic filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 6870 50400 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 41760 (483%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 6870 is superior to the GeForce 8600 GT 512MB DDR2, by far. (explain)

Radeon HD 6870 28800 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 24480 (567%)

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 6870

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 6870
Manufacturer nVidia AMD
Year April 2007 October 2010
Code Name G84 Barts XT
Memory 512 MB 1024 MB
Core Speed 540 MHz 900 MHz
Memory Speed 800 MHz 4200 MHz
Power (Max TDP) 47 watts 151 watts
Bandwidth 12800 MB/sec 134400 MB/sec
Texel Rate 8640 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 32 1120
Texture Mapping Units 16 56
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 80 nm 40 nm
Transistors 289 million 1700 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated 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 ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

Radeon HD 6870

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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