GeForce GTX 850M vs Radeon HD 6750

Intro

Compare all of that to the Radeon HD 6750, which comes with a clock speed of 725 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 128-bit memory bus, and uses a 40 nm design. It features 720 SPUs, 36 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 6750		86 Watts
	Difference: 46 Watts (115%)

Memory Bandwidth

Performance-wise, the Radeon HD 6750 should in theory be much superior to the GeForce GTX 850M in general. (explain)

Radeon HD 6750		64000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 32000 (100%)

Texel Rate

The GeForce GTX 850M should be quite a bit (approximately 34%) faster with regards to texture filtering than the Radeon HD 6750. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 6750		26100 Mtexels/sec
	Difference: 8940 (34%)

Pixel Rate

The GeForce GTX 850M will be much (more or less 21%) faster with regards to anti-aliasing than the Radeon HD 6750, and able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 6750		11600 Mpixels/sec
	Difference: 2416 (21%)

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 largest amount of data (in units of megabytes per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant 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 maximum fill rate.