GeForce GTX 965M vs Radeon HD 7950 3GB

Intro

Compare those specs to the Radeon HD 7950 3GB, which makes use of a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this model. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 965M		60 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 140 Watts (233%)

Memory Bandwidth

The Radeon HD 7950 3GB should in theory perform quite a bit faster than the GeForce GTX 965M in general. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GTX 965M		64000 MB/sec
	Difference: 176000 (275%)

Texel Rate

The Radeon HD 7950 3GB will be much (approximately 48%) more effective at anisotropic filtering than the GeForce GTX 965M. (explain)

Radeon HD 7950 3GB		89600 Mtexels/sec
GeForce GTX 965M		60416 Mtexels/sec
	Difference: 29184 (48%)

Pixel Rate

The GeForce GTX 965M should be a bit (more or less 18%) better at FSAA than the Radeon HD 7950 3GB, and also will be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 965M		30208 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 4608 (18%)

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 data (in units of megabytes per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR 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 faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling 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 the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the card's 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 lots of 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.