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GeForce GTX 860M vs Radeon HD 6790

Intro

The GeForce GTX 860M has a clock speed of 797 MHz and a GDDR5 memory speed of 1000 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 1152 SPUs, 96 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 6790, which has a core clock frequency of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit memory bus, and uses a 40 nm design. It features 800 SPUs, 40 Texture Address Units, 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 860M 4340 points
Radeon HD 6790 2150 points
Difference: 2190 (102%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 860M 45 Watts
Radeon HD 6790 150 Watts
Difference: 105 Watts (233%)

Memory Bandwidth

In theory, the Radeon HD 6790 should be 110% quicker than the GeForce GTX 860M in general, due to its greater data rate. (explain)

Radeon HD 6790 134400 MB/sec
GeForce GTX 860M 64000 MB/sec
Difference: 70400 (110%)

Texel Rate

The GeForce GTX 860M will be quite a bit (approximately 128%) faster with regards to AF than the Radeon HD 6790. (explain)

GeForce GTX 860M 76512 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 42912 (128%)

Pixel Rate

The Radeon HD 6790 is a little bit (approximately 5%) faster with regards to full screen anti-aliasing than the GeForce GTX 860M, and able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6790 13440 Mpixels/sec
GeForce GTX 860M 12752 Mpixels/sec
Difference: 688 (5%)

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 860M

Amazon.com

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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 860M Radeon HD 6790
Manufacturer nVidia AMD
Year March 12 2014 April 2011
Code Name GM107 Barts LE
Memory 4096 MB 1024 MB
Core Speed 797 MHz 840 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 45 watts 150 watts
Bandwidth 64000 MB/sec 134400 MB/sec
Texel Rate 76512 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 12752 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 1152 800
Texture Mapping Units 96 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 40 nm
Transistors (Unknown) million 1700 million
Bus PCIe 3.0 x16 PCIe 2.1 x16
DirectX Version DirectX 12 DirectX 11
OpenGL Version OpenGL 4.5 OpenGL 4.1

Memory Bandwidth: Memory bandwidth is the largest amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 processed in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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GeForce GTX 860M

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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