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GeForce GTX 880M vs Radeon HD 6790

Intro

The GeForce GTX 880M makes use of a 28 nm design. nVidia has set the core frequency at 954 MHz. The GDDR5 memory works at a speed of 1000 MHz on this particular model. It features 1536 SPUs along with 128 Texture Address Units and 32 ROPs.

Compare those specs to the Radeon HD 6790, which features a clock frequency of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It is comprised of 800 SPUs, 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 880M 6360 points
Radeon HD 6790 2150 points
Difference: 4210 (196%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
Radeon HD 6790 150 Watts
Difference: 20 Watts (15%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6790 is 5% faster than the GeForce GTX 880M overall, because of its higher data rate. (explain)

Radeon HD 6790 134400 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 6400 (5%)

Texel Rate

The GeForce GTX 880M will be quite a bit (approximately 263%) better at texture filtering than the Radeon HD 6790. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon HD 6790 33600 Mtexels/sec
Difference: 88512 (263%)

Pixel Rate

The GeForce GTX 880M will be quite a bit (more or less 127%) better at AA than the Radeon HD 6790, and capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon HD 6790 13440 Mpixels/sec
Difference: 17088 (127%)

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 880M

Amazon.com

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Radeon HD 6790

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 880M Radeon HD 6790
Manufacturer nVidia AMD
Year March 12 2014 April 2011
Code Name GK104 Barts LE
Memory 4096 MB 1024 MB
Core Speed 954 MHz 840 MHz
Memory Speed 4000 MHz 4200 MHz
Power (Max TDP) 130 watts 150 watts
Bandwidth 128000 MB/sec 134400 MB/sec
Texel Rate 122112 Mtexels/sec 33600 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 13440 Mpixels/sec
Unified Shaders 1536 800
Texture Mapping Units 128 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-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: Bandwidth is the largest amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill 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 maximum fill rate.

Display Prices

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GeForce GTX 880M

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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