GeForce GTX 965M vs Radeon HD 5770

Intro

Compare those specifications to the Radeon HD 5770, which has a clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 5770		108 Watts
	Difference: 48 Watts (80%)

Memory Bandwidth

In theory, the Radeon HD 5770 should be 20% faster than the GeForce GTX 965M in general, due to its greater bandwidth. (explain)

Radeon HD 5770		76800 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 12800 (20%)

Texel Rate

The GeForce GTX 965M should be a lot (approximately 78%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 26416 (78%)

Pixel Rate

The GeForce GTX 965M should be quite a bit (more or less 122%) better at full screen anti-aliasing than the Radeon HD 5770, and also will be capable of handling higher resolutions while still performing well. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 16608 (122%)

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 data (in units of megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better 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 in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.