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Geforce GTX 780 vs Radeon HD 6790

Intro

The Geforce GTX 780 features a clock frequency of 863 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 384-bit memory bus, and uses a 28 nm design. It is made up of 2304 SPUs, 192 TAUs, and 48 ROPs.

Compare all that to the Radeon HD 6790, which has GPU core speed of 840 MHz, and 1024 MB of GDDR5 RAM running at 1050 MHz through a 256-bit bus. It also is comprised of 800 Stream Processors, 40 TAUs, and 16 Raster Operation 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

The Geforce GTX 780 should in theory perform much faster than the Radeon HD 6790 overall. (explain)

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

Texel Rate

The Geforce GTX 780 should be quite a bit (approximately 393%) faster with regards to anisotropic filtering 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 should be a lot (approximately 208%) better at anti-aliasing than the Radeon HD 6790, and capable of handling higher resolutions while still performing well. (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 maximum amount of information (measured in MB per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of 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 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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