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GeForce GTX 280 vs Radeon HD 6790

Intro

The GeForce GTX 280 has a GPU core clock speed of 602 MHz, and the 1024 MB of GDDR3 RAM is set to run at 1107 MHz through a 512-bit bus. It also features 240 SPUs, 80 TAUs, and 32 ROPs.

Compare all of that to the Radeon HD 6790, which features a core clock speed of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790 150 Watts
GeForce GTX 280 236 Watts
Difference: 86 Watts (57%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 280 should be just a bit faster than the Radeon HD 6790 in general. (explain)

GeForce GTX 280 141696 MB/sec
Radeon HD 6790 134400 MB/sec
Difference: 7296 (5%)

Texel Rate

The GeForce GTX 280 is quite a bit (about 43%) faster with regards to AF than the Radeon HD 6790. (explain)

GeForce GTX 280 48160 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 14560 (43%)

Pixel Rate

The GeForce GTX 280 should be quite a bit (approximately 43%) better at anti-aliasing than the Radeon HD 6790, and also should be able to handle higher resolutions better. (explain)

GeForce GTX 280 19264 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 5824 (43%)

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 280

Amazon.com

Check prices at:

Radeon HD 6790

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 280 Radeon HD 6790
Manufacturer nVidia AMD
Year June 17, 2008 April 2011
Code Name G200 Barts LE
Memory 1024 MB 1024 MB
Core Speed 602 MHz 840 MHz
Memory Speed 2214 MHz 4200 MHz
Power (Max TDP) 236 watts 150 watts
Bandwidth 141696 MB/sec 134400 MB/sec
Texel Rate 48160 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 19264 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 240 800
Texture Mapping Units 80 40
Render Output Units 32 16
Bus Type GDDR3 GDDR5
Bus Width 512-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 1400 million 1700 million
Bus PCIe x16 2.0 PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the maximum amount of information (measured in MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the bus width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 applied per second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GTX 280

Amazon.com

Check prices at:

Radeon HD 6790

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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