GeForce GTX 965M vs Radeon HD 7950 3GB

Intro

Compare those specifications to the Radeon HD 7950 3GB, which uses a 28 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 RAM runs at a speed of 1250 MHz on this specific card. It features 1792 SPUs as well as 112 Texture Address Units and 32 Rasterization Operator Units.

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

Theoretically speaking, the Radeon HD 7950 3GB should be a lot 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 is much (more or less 48%) better at AF than the GeForce GTX 965M. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 965M is superior to the Radeon HD 7950 3GB, not by a very large margin though. (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 information (in units of megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better 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 amount of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units by the core 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 processed per second.

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