GeForce GTX 850M vs Radeon HD 5670

Intro

Compare that to the Radeon HD 5670, which has core speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon HD 5670		61 Watts
	Difference: 21 Watts (53%)

Memory Bandwidth

In theory, the Radeon HD 5670 will be 100% faster than the GeForce GTX 850M in general, because of its greater data rate. (explain)

Radeon HD 5670		64000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 32000 (100%)

Texel Rate

The GeForce GTX 850M is much (approximately 126%) more effective at AF than the Radeon HD 5670. (explain)

GeForce GTX 850M		35040 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 19540 (126%)

Pixel Rate

The GeForce GTX 850M should be much (approximately 126%) faster with regards to FSAA than the Radeon HD 5670, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 850M		14016 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 7816 (126%)

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 information (in units of MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.