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GeForce GTX 880M vs Radeon HD 6790

Intro

The GeForce GTX 880M comes with a clock speed of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 256-bit bus, and makes use of a 28 nm design. It is comprised of 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare that to the Radeon HD 6790, which features a core clock frequency of 840 MHz and a GDDR5 memory speed of 1050 MHz. It also features a 256-bit bus, and uses a 40 nm design. It is comprised of 800 SPUs, 40 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 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 should be a little bit faster than the GeForce GTX 880M overall. (explain)

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

Texel Rate

The GeForce GTX 880M will be a lot (approximately 263%) more effective 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 much (approximately 127%) better at anti-aliasing than the Radeon HD 6790, and should be able to handle higher screen resolutions while still performing well. (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

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 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: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This 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 a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to 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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