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GeForce GTX 660 vs Radeon HD 5830

Intro

The GeForce GTX 660 uses a 28 nm design. nVidia has set the core frequency at 980 MHz. The GDDR5 memory is set to run at a frequency of 1502 MHz on this particular model. It features 960 SPUs along with 80 Texture Address Units and 24 ROPs.

Compare those specs to the Radeon HD 5830, which has GPU clock speed of 800 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also is made up of 1120(224x5) SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 660 140 Watts
Radeon HD 5830 175 Watts
Difference: 35 Watts (25%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should in theory be a small bit better than the Radeon HD 5830 overall. (explain)

GeForce GTX 660 144192 MB/sec
Radeon HD 5830 128000 MB/sec
Difference: 16192 (13%)

Texel Rate

The GeForce GTX 660 will be quite a bit (about 75%) more effective at AF than the Radeon HD 5830. (explain)

GeForce GTX 660 78400 Mtexels/sec
Radeon HD 5830 44800 Mtexels/sec
Difference: 33600 (75%)

Pixel Rate

The GeForce GTX 660 is quite a bit (approximately 84%) better at FSAA than the Radeon HD 5830, and should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 660 23520 Mpixels/sec
Radeon HD 5830 12800 Mpixels/sec
Difference: 10720 (84%)

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 5830

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 5830
Manufacturer nVidia AMD
Year September 2012 February 25, 2010
Code Name GK106 Cypress LE
Memory 2048 MB 1024 MB
Core Speed 980 MHz 800 MHz
Memory Speed 6008 MHz 4000 MHz
Power (Max TDP) 140 watts 175 watts
Bandwidth 144192 MB/sec 128000 MB/sec
Texel Rate 78400 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 23520 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 960 1120(224x5)
Texture Mapping Units 80 56
Render Output Units 24 16
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 megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX 660

Amazon.com

Check prices at:

Radeon HD 5830

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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