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GeForce GTX 560 vs Radeon HD 6790

Intro

The GeForce GTX 560 has core speeds of 810 MHz on the GPU, and 1001 MHz on the 1024 MB of GDDR5 RAM. It features 336 SPUs as well as 56 TAUs and 32 Rasterization Operator Units.

Compare those specs to the Radeon HD 6790, which comes with clock speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 RAM. It features 800 SPUs along with 40 Texture Address Units 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 560		3030 points
Radeon HD 6790		2150 points
	Difference: 880 (41%)

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically, the Radeon HD 6790 should perform a little bit faster than the GeForce GTX 560 in general. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GTX 560		128128 MB/sec
	Difference: 6272 (5%)

Texel Rate

The GeForce GTX 560 will be much (more or less 35%) more effective at texture filtering than the Radeon HD 6790. (explain)

GeForce GTX 560		45360 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 11760 (35%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 560 is a better choice, by far. (explain)

GeForce GTX 560		25920 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 12480 (93%)

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 560

Amazon.com

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Radeon HD 6790

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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 560	Radeon HD 6790
Manufacturer	nVidia	AMD
Year	May 2011	April 2011
Code Name	GF114	Barts LE
Memory	1024 MB	1024 MB
Core Speed	810 MHz	840 MHz
Memory Speed	4004 MHz	4200 MHz
Power (Max TDP)	150 watts	150 watts
Bandwidth	128128 MB/sec	134400 MB/sec
Texel Rate	45360 Mtexels/sec	33600 Mtexels/sec
Pixel Rate	25920 Mpixels/sec	13440 Mpixels/sec
Unified Shaders	336	800
Texture Mapping Units	56	40
Render Output Units	32	16
Bus Type	GDDR5	GDDR5
Bus Width	256-bit	256-bit
Fab Process	40 nm	40 nm
Transistors	1950 million	1700 million
Bus	PCIe 2.0 x16	PCIe 2.1 x16
DirectX Version	DirectX 11	DirectX 11
OpenGL Version	OpenGL 4.1	OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the max amount of information (measured in MB per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If the card has DDR type memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of 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 worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

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