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Geforce GTX 770 vs Radeon HD 7790

Intro

The Geforce GTX 770 features a GPU clock speed of 1046 MHz, and the 2048 MB of GDDR5 RAM runs at 1753 MHz through a 256-bit bus. It also features 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon HD 7790, which makes use of a 28 nm design. AMD has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a speed of 1500 MHz on this particular card. It features 896 SPUs along with 56 TAUs and 16 ROPs.

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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 770 7854 points
Radeon HD 7790 4330 points
Difference: 3524 (81%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Geforce GTX 770 230 Watts
Difference: 145 Watts (171%)

Memory Bandwidth

In theory, the Geforce GTX 770 is 134% quicker than the Radeon HD 7790 overall, because of its higher data rate. (explain)

Geforce GTX 770 224384 MB/sec
Radeon HD 7790 96000 MB/sec
Difference: 128384 (134%)

Texel Rate

The Geforce GTX 770 should be a lot (approximately 139%) better at texture filtering than the Radeon HD 7790. (explain)

Geforce GTX 770 133888 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 77888 (139%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Geforce GTX 770 is the winner, by a large margin. (explain)

Geforce GTX 770 33472 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 17472 (109%)

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 770

Amazon.com

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Radeon HD 7790

Amazon.com

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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 770 Radeon HD 7790
Manufacturer nVidia AMD
Year May 2013 March 2013
Code Name GK104 Bonaire XT
Memory 2048 MB 1024 MB
Core Speed 1046 MHz 1000 MHz
Memory Speed 7012 MHz 6000 MHz
Power (Max TDP) 230 watts 85 watts
Bandwidth 224384 MB/sec 96000 MB/sec
Texel Rate 133888 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 33472 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1536 896
Texture Mapping Units 128 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 3540 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be moved over the external memory interface in a second. It's worked out by multiplying the card's bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 texture map elements (texels) that can be processed per second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called 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 reach the maximum fill rate.

Display Prices

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Geforce GTX 770

Amazon.com

Check prices at:

Radeon HD 7790

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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