GeForce GTX 870M vs Radeon HD 5770

Intro

Compare those specs to the Radeon HD 5770, which has core clock speeds of 850 MHz on the GPU, and 1200 MHz on the 1024 MB of GDDR5 memory. It features 800(160x5) SPUs as well as 40 TAUs and 16 ROPs.

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

As far as performance goes, the GeForce GTX 870M should theoretically be quite a bit better than the Radeon HD 5770 in general. (explain)

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

Texel Rate

The GeForce GTX 870M is much (approximately 210%) better at 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

The GeForce GTX 870M is a lot (about 66%) faster with regards to FSAA than the Radeon HD 5770, and should be able to handle higher resolutions while still performing well. (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: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transferred past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen 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 by the core clock 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 processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also called 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 of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.