GeForce GTX 980M vs Radeon HD 6750

Intro

Compare all that to the Radeon HD 6750, which features GPU core speed of 725 MHz, and 512 MB of GDDR5 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 720 SPUs, 36 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6750		86 Watts
GeForce GTX 980M		100 Watts
	Difference: 14 Watts (16%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 980M is 100% faster than the Radeon HD 6750 overall, because of its greater bandwidth. (explain)

GeForce GTX 980M		128000 MB/sec
Radeon HD 6750		64000 MB/sec
	Difference: 64000 (100%)

Texel Rate

The GeForce GTX 980M should be much (about 282%) better at AF than the Radeon HD 6750. (explain)

GeForce GTX 980M		99648 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 73548 (282%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 980M is a better choice, by far. (explain)

GeForce GTX 980M		66432 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 54832 (473%)

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: Bandwidth is the max amount of information (measured in megabytes per second) that can be transferred past the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.