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GeForce 8600 GT 512MB DDR2 vs Radeon HD 7950

Intro

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

Compare that to the Radeon HD 7950, which uses a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this model. It features 1792 SPUs as well as 112 TAUs and 32 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 7950 200 Watts
Difference: 153 Watts (326%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7950 will be 1775% quicker than the GeForce 8600 GT 512MB DDR2 overall, due to its higher bandwidth. (explain)

Radeon HD 7950 240000 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 227200 (1775%)

Texel Rate

The Radeon HD 7950 is quite a bit (approximately 937%) more effective at texture filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 7950 89600 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 80960 (937%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7950 is the winner, by a large margin. (explain)

Radeon HD 7950 25600 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 21280 (493%)

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 7950

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 7950
Manufacturer nVidia AMD
Year April 2007 January 2012
Code Name G84 Tahiti Pro
Memory 512 MB 1536 MB
Core Speed 540 MHz 800 MHz
Memory Speed 800 MHz 5000 MHz
Power (Max TDP) 47 watts 200 watts
Bandwidth 12800 MB/sec 240000 MB/sec
Texel Rate 8640 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 32 1792
Texture Mapping Units 16 112
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 384-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 4.2

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the 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 7950

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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