GeForce GTX 965M vs Radeon HD 6770 1GB

Intro

Compare that to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has set the core speed at 900 MHz. The GDDR5 memory runs at a frequency of 1050 MHz on this particular card. It features 800 SPUs as well as 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 6770 1GB		108 Watts
	Difference: 48 Watts (80%)

Memory Bandwidth

The Radeon HD 6770 1GB should in theory be a small bit faster than the GeForce GTX 965M in general. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 3200 (5%)

Texel Rate

The GeForce GTX 965M is a lot (about 68%) faster with regards to anisotropic filtering than the Radeon HD 6770 1GB. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 6770 1GB		36000 Mtexels/sec
	Difference: 24416 (68%)

Pixel Rate

The GeForce GTX 965M will be much (about 110%) faster with regards to full screen anti-aliasing than the Radeon HD 6770 1GB, and should be capable of handling higher screen resolutions better. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 15808 (110%)

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 (counted in megabytes per second) that can be transported across the external memory interface in one second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.