GeForce GTX 980M vs Radeon HD 6790

Intro

Compare those specs to the Radeon HD 6790, which comes with a clock speed of 840 MHz and a GDDR5 memory frequency of 1050 MHz. It also uses a 256-bit bus, and makes use of a 40 nm design. It is made up of 800 SPUs, 40 Texture Address Units, and 16 ROPs.

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

Performance-wise, the Radeon HD 6790 should in theory be a bit superior to the GeForce GTX 980M in general. (explain)

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

Texel Rate

The GeForce GTX 980M is a lot (more or less 197%) faster with regards to 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 (approximately 394%) more effective at full screen anti-aliasing than the Radeon HD 6790, and also capable of handling higher screen resolutions without losing too much performance. (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 information (counted in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.