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GeForce GTX 260 vs Radeon HD 6790

Intro

The GeForce GTX 260 has a GPU core clock speed of 576 MHz, and the 896 MB of GDDR3 RAM is set to run at 999 MHz through a 448-bit bus. It also features 192 SPUs, 64 TAUs, and 28 ROPs.

Compare those specifications to the Radeon HD 6790, which features core speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790 150 Watts
GeForce GTX 260 182 Watts
Difference: 32 Watts (21%)

Memory Bandwidth

In theory, the Radeon HD 6790 should be 20% quicker than the GeForce GTX 260 in general, because of its greater data rate. (explain)

Radeon HD 6790 134400 MB/sec
GeForce GTX 260 111888 MB/sec
Difference: 22512 (20%)

Texel Rate

The GeForce GTX 260 should be just a bit (approximately 10%) better at texture filtering than the Radeon HD 6790. (explain)

GeForce GTX 260 36864 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 3264 (10%)

Pixel Rate

The GeForce GTX 260 will be a bit (more or less 20%) better at full screen anti-aliasing than the Radeon HD 6790, and also will be able to handle higher resolutions better. (explain)

GeForce GTX 260 16128 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 2688 (20%)

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 260

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 260 Radeon HD 6790
Manufacturer nVidia AMD
Year June 16, 2008 April 2011
Code Name G200 Barts LE
Memory 896 MB 1024 MB
Core Speed 576 MHz 840 MHz
Memory Speed 1998 MHz 4200 MHz
Power (Max TDP) 182 watts 150 watts
Bandwidth 111888 MB/sec 134400 MB/sec
Texel Rate 36864 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 16128 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 192 800
Texture Mapping Units 64 40
Render Output Units 28 16
Bus Type GDDR3 GDDR5
Bus Width 448-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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once 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 can be processed per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

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

Display Prices

Hide Prices

GeForce GTX 260

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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