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GeForce 8600 GTS vs Radeon HD 7790

Intro

The GeForce 8600 GTS has a core clock frequency of 675 MHz and a GDDR3 memory speed of 1000 MHz. It also makes use of a 128-bit bus, and makes use of a 80 nm design. It features 32 SPUs, 16 Texture Address Units, and 8 Raster Operation Units.

Compare that to the Radeon HD 7790, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this model. It features 896 SPUs along with 56 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GTS 75 Watts
Radeon HD 7790 85 Watts
Difference: 10 Watts (13%)

Memory Bandwidth

In theory, the Radeon HD 7790 should perform quite a bit faster than the GeForce 8600 GTS in general. (explain)

Radeon HD 7790 96000 MB/sec
GeForce 8600 GTS 32000 MB/sec
Difference: 64000 (200%)

Texel Rate

The Radeon HD 7790 is a lot (approximately 419%) faster with regards to AF than the GeForce 8600 GTS. (explain)

Radeon HD 7790 56000 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 45200 (419%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7790 is superior to the GeForce 8600 GTS, by a large margin. (explain)

Radeon HD 7790 16000 Mpixels/sec
GeForce 8600 GTS 5400 Mpixels/sec
Difference: 10600 (196%)

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 GTS

Amazon.com

Check prices at:

Radeon HD 7790

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 GTS Radeon HD 7790
Manufacturer nVidia AMD
Year April 2007 March 2013
Code Name G84 Bonaire XT
Memory 512 MB 1024 MB
Core Speed 675 MHz 1000 MHz
Memory Speed 2000 MHz 6000 MHz
Power (Max TDP) 75 watts 85 watts
Bandwidth 32000 MB/sec 96000 MB/sec
Texel Rate 10800 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 32 896
Texture Mapping Units 16 56
Render Output Units 8 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 80 nm 28 nm
Transistors 289 million 2080 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 largest amount of information (measured in MB per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total number of texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce 8600 GTS

Amazon.com

Check prices at:

Radeon HD 7790

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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