GeForce GTX 965M vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which uses a 40 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM works at a speed of 1050 MHz on this particular model. It features 800 SPUs along with 40 Texture Address Units 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 theoretically be a small bit faster than the GeForce GTX 965M overall. (explain)

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

Texel Rate

The GeForce GTX 965M should be much (more or less 68%) better at AF 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

If running with high levels of AA is important to you, then the GeForce GTX 965M is superior to the Radeon HD 6770 1GB, and very much so. (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 (in units of megabytes per second) that can be transferred over the external memory interface in one second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.