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Geforce GTX 780 vs Radeon HD 6790

Intro

The Geforce GTX 780 features a clock speed of 863 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 384-bit bus, and makes use of a 28 nm design. It is comprised of 2304 SPUs, 192 Texture Address Units, and 48 Raster Operation Units.

Compare that to the Radeon HD 6790, which makes use of a 40 nm design. AMD has clocked the core speed at 840 MHz. The GDDR5 memory runs at a speed of 1050 MHz on this particular model. It features 800 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Geforce GTX 780 10082 points
Radeon HD 6790 2150 points
Difference: 7932 (369%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6790 150 Watts
Geforce GTX 780 250 Watts
Difference: 100 Watts (67%)

Memory Bandwidth

In theory, the Geforce GTX 780 will be 115% faster than the Radeon HD 6790 overall, because of its higher data rate. (explain)

Geforce GTX 780 288384 MB/sec
Radeon HD 6790 134400 MB/sec
Difference: 153984 (115%)

Texel Rate

The Geforce GTX 780 will be much (approximately 393%) more effective at AF than the Radeon HD 6790. (explain)

Geforce GTX 780 165696 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 132096 (393%)

Pixel Rate

The Geforce GTX 780 is much (about 208%) better at FSAA than the Radeon HD 6790, and capable of handling higher resolutions better. (explain)

Geforce GTX 780 41424 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 27984 (208%)

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 780

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 780 Radeon HD 6790
Manufacturer nVidia AMD
Year May 2013 April 2011
Code Name GK110 Barts LE
Memory 3072 MB 1024 MB
Core Speed 863 MHz 840 MHz
Memory Speed 6008 MHz 4200 MHz
Power (Max TDP) 250 watts 150 watts
Bandwidth 288384 MB/sec 134400 MB/sec
Texel Rate 165696 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 41424 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 2304 800
Texture Mapping Units 192 40
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 7080 million 1700 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on 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 780

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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