GeForce GTX 880M vs Radeon HD 7950 3GB

Intro

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

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M		130 Watts
Radeon HD 7950 3GB		200 Watts
	Difference: 70 Watts (54%)

Memory Bandwidth

The Radeon HD 7950 3GB should in theory be quite a bit faster than the GeForce GTX 880M overall. (explain)

Radeon HD 7950 3GB		240000 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 112000 (88%)

Texel Rate

The GeForce GTX 880M should be quite a bit (approximately 36%) more effective at AF than the Radeon HD 7950 3GB. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon HD 7950 3GB		89600 Mtexels/sec
	Difference: 32512 (36%)

Pixel Rate

The GeForce GTX 880M will be a little bit (more or less 19%) better at full screen anti-aliasing than the Radeon HD 7950 3GB, and also able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon HD 7950 3GB		25600 Mpixels/sec
	Difference: 4928 (19%)

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 information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total texture units by the core 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.