GeForce GTX 870M vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which has GPU core speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) Stream Processors, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
GeForce GTX 870M		110 Watts
	Difference: 2 Watts (2%)

Memory Bandwidth

The GeForce GTX 870M should theoretically perform quite a bit faster than the Radeon HD 5770 overall. (explain)

GeForce GTX 870M		96000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 19200 (25%)

Texel Rate

The GeForce GTX 870M should be much (approximately 210%) faster with regards to texture filtering than the Radeon HD 5770. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 71392 (210%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 870M is a better choice, and very much so. (explain)

GeForce GTX 870M		22584 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 8984 (66%)

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 (counted in MB per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 can be applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.