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GeForce GTX 660 vs Radeon HD 5870

Intro

The GeForce GTX 660 has core clock speeds of 980 MHz on the GPU, and 1502 MHz on the 2048 MB of GDDR5 memory. It features 960 SPUs as well as 80 Texture Address Units and 24 Rasterization Operator Units.

Compare that to the Radeon HD 5870, which features core speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 1600(320x5) SPUs along with 80 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
Radeon HD 5870 188 Watts
Difference: 48 Watts (34%)

Memory Bandwidth

Performance-wise, the Radeon HD 5870 should theoretically be a little bit better than the GeForce GTX 660 overall. (explain)

Radeon HD 5870 153600 MB/sec
GeForce GTX 660 144192 MB/sec
Difference: 9408 (7%)

Texel Rate

The GeForce GTX 660 is a small bit (about 15%) better at anisotropic filtering than the Radeon HD 5870. (explain)

GeForce GTX 660 78400 Mtexels/sec
Radeon HD 5870 68000 Mtexels/sec
Difference: 10400 (15%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 5870 is superior to the GeForce GTX 660, though only just barely. (explain)

Radeon HD 5870 27200 Mpixels/sec
GeForce GTX 660 23520 Mpixels/sec
Difference: 3680 (16%)

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 GTX 660

Amazon.com

Check prices at:

Radeon HD 5870

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 GTX 660 Radeon HD 5870
Manufacturer nVidia AMD
Year September 2012 September 23, 2009
Code Name GK106 Cypress XT
Memory 2048 MB 1024 MB
Core Speed 980 MHz 850 MHz
Memory Speed 6008 MHz 4800 MHz
Power (Max TDP) 140 watts 188 watts
Bandwidth 144192 MB/sec 153600 MB/sec
Texel Rate 78400 Mtexels/sec 68000 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 27200 Mpixels/sec
Unified Shaders 960 1600(320x5)
Texture Mapping Units 80 80
Render Output Units 24 32
Bus Type GDDR5 GDDR5
Bus Width 192-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 2540 million 2154 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the 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 graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 660

Amazon.com

Check prices at:

Radeon HD 5870

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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