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GeForce 8600 GT 512MB DDR2 vs Radeon HD 7850

Intro

The GeForce 8600 GT 512MB DDR2 uses a 80 nm design. nVidia has clocked the core speed at 540 MHz. The DDR2 memory is set to run at a speed of 400 MHz on this particular model. It features 32 SPUs as well as 16 TAUs and 8 ROPs.

Compare those specs to the Radeon HD 7850, which makes use of a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 memory runs at a speed of 1200 MHz on this specific model. It features 1024 SPUs along with 64 Texture Address Units 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 7850 130 Watts
Difference: 83 Watts (177%)

Memory Bandwidth

The Radeon HD 7850, in theory, should perform quite a bit faster than the GeForce 8600 GT 512MB DDR2 in general. (explain)

Radeon HD 7850 153600 MB/sec
GeForce 8600 GT 512MB DDR2 12800 MB/sec
Difference: 140800 (1100%)

Texel Rate

The Radeon HD 7850 should be quite a bit (about 537%) better at anisotropic filtering than the GeForce 8600 GT 512MB DDR2. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce 8600 GT 512MB DDR2 8640 Mtexels/sec
Difference: 46400 (537%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7850 is superior to the GeForce 8600 GT 512MB DDR2, and very much so. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce 8600 GT 512MB DDR2 4320 Mpixels/sec
Difference: 23200 (537%)

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 7850

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 7850
Manufacturer nVidia AMD
Year April 2007 March 2012
Code Name G84 Pitcairn Pro
Memory 512 MB 2048 MB
Core Speed 540 MHz 860 MHz
Memory Speed 800 MHz 4800 MHz
Power (Max TDP) 47 watts 130 watts
Bandwidth 12800 MB/sec 153600 MB/sec
Texel Rate 8640 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 32 1024
Texture Mapping Units 16 64
Render Output Units 8 32
Bus Type DDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 80 nm 28 nm
Transistors 289 million 2800 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: Memory bandwidth is the largest amount of data (in units of MB per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 are processed per second. This figure is worked out by multiplying the total amount of texture units 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics 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 is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GT 512MB DDR2

Amazon.com

Check prices at:

Radeon HD 7850

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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