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GeForce 8600 GTS vs Radeon HD 7770

Intro

The GeForce 8600 GTS comes with core clock speeds of 675 MHz on the GPU, and 1000 MHz on the 512 MB of GDDR3 memory. It features 32 SPUs along with 16 TAUs and 8 Rasterization Operator Units.

Compare all of that to the Radeon HD 7770, which has GPU core speed of 1000 MHz, and 1024 MB of GDDR5 RAM running at 1125 MHz through a 128-bit bus. It also is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8600 GTS 75 Watts
Radeon HD 7770 80 Watts
Difference: 5 Watts (7%)

Memory Bandwidth

In theory, the Radeon HD 7770 should perform much faster than the GeForce 8600 GTS overall. (explain)

Radeon HD 7770 72000 MB/sec
GeForce 8600 GTS 32000 MB/sec
Difference: 40000 (125%)

Texel Rate

The Radeon HD 7770 will be quite a bit (approximately 270%) faster with regards to texture filtering than the GeForce 8600 GTS. (explain)

Radeon HD 7770 40000 Mtexels/sec
GeForce 8600 GTS 10800 Mtexels/sec
Difference: 29200 (270%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon HD 7770 is superior to the GeForce 8600 GTS, by a large margin. (explain)

Radeon HD 7770 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 7770

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 7770
Manufacturer nVidia AMD
Year April 2007 February 2012
Code Name G84 Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 675 MHz 1000 MHz
Memory Speed 2000 MHz 4500 MHz
Power (Max TDP) 75 watts 80 watts
Bandwidth 32000 MB/sec 72000 MB/sec
Texel Rate 10800 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 5400 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 32 640
Texture Mapping Units 16 40
Render Output Units 8 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 80 nm 28 nm
Transistors 289 million 1500 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 max amount of data (in units of megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many 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 GTS

Amazon.com

Check prices at:

Radeon HD 7770

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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