GeForce GTX 965M vs Radeon HD 5670

Intro

Compare those specs to the Radeon HD 5670, which uses a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 memory is set to run at a frequency of 1000 MHz on this particular card. It features 400(80x5) SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 5670		61 Watts
	Difference: 1 Watts (2%)

Memory Bandwidth

Both cards have the exact same memory bandwidth, so theoretically they should perform the same. (explain)

Texel Rate

The GeForce GTX 965M will be a lot (about 290%) better at texture filtering than the Radeon HD 5670. (explain)

GeForce GTX 965M		60416 Mtexels/sec
Radeon HD 5670		15500 Mtexels/sec
	Difference: 44916 (290%)

Pixel Rate

The GeForce GTX 965M is much (more or less 387%) more effective at AA than the Radeon HD 5670, and will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 5670		6200 Mpixels/sec
	Difference: 24008 (387%)

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 information (measured in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If it uses DDR memory, the result 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, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.