GeForce GTX 980M vs Radeon HD 6790

Intro

Compare all that to the Radeon HD 6790, which comes with core speeds of 840 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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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 980M		9476 points
Radeon HD 6790		2150 points
	Difference: 7326 (341%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 980M		100 Watts
Radeon HD 6790		150 Watts
	Difference: 50 Watts (50%)

Memory Bandwidth

In theory, the Radeon HD 6790 should be a little bit faster than the GeForce GTX 980M overall. (explain)

Radeon HD 6790		134400 MB/sec
GeForce GTX 980M		128000 MB/sec
	Difference: 6400 (5%)

Texel Rate

The GeForce GTX 980M should be much (more or less 197%) better at anisotropic filtering than the Radeon HD 6790. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 66048 (197%)

Pixel Rate

The GeForce GTX 980M should be quite a bit (about 394%) better at FSAA than the Radeon HD 6790, and will be able to handle higher resolutions better. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 52992 (394%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, 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 per second - measured in millions of pixels per second. The figure is calculated 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.