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GeForce 8600 GT 512MB DDR2 vs Radeon HD 7870 XT

Intro

The GeForce 8600 GT 512MB DDR2 makes use of a 80 nm design. nVidia has set the core frequency at 540 MHz. The DDR2 memory runs at a frequency of 400 MHz on this model. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

Compare those specifications to the Radeon HD 7870 XT, which has GPU clock speed of 925 MHz, and 2048 MB of GDDR5 memory set to run at 1500 MHz through a 256-bit bus. It also features 1536 Stream Processors, 96 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GT 512MB DDR2 47 Watts
Radeon HD 7870 XT 185 Watts
Difference: 138 Watts (294%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 XT will be 1400% faster than the GeForce 8600 GT 512MB DDR2 in general, due to its greater bandwidth. (explain)

Radeon HD 7870 XT 192000 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 179200 (1400%)

Texel Rate

The Radeon HD 7870 XT will be quite a bit (more or less 928%) more effective at texture filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 80160 (928%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 7870 XT is superior to the GeForce 8600 GT 512MB DDR2, and very much so. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 25280 (585%)

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 7870 XT

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 7870 XT
Manufacturer nVidia AMD
Year April 2007 November 2012
Code Name G84 Tahiti LE
Memory 512 MB 2048 MB
Core Speed 540 MHz 925 MHz
Memory Speed 800 MHz 6000 MHz
Power (Max TDP) 47 watts 185 watts
Bandwidth 12800 MB/sec 192000 MB/sec
Texel Rate 8640 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 32 1536
Texture Mapping Units 16 96
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 80 nm 28 nm
Transistors 289 million 4313 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be applied in one second. This is calculated 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines 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 is also dependant on quite a few 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 7870 XT

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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