GeForce GTX 880M vs Radeon HD 7950 3GB

Intro

Compare all of that to the Radeon HD 7950 3GB, which uses a 28 nm design. AMD has set the core speed at 800 MHz. The GDDR5 RAM works at a speed of 1250 MHz on this card. It features 1792 SPUs along with 112 TAUs 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 much 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 will be quite a bit (approximately 36%) better 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

If running with a high screen resolution is important to you, then the GeForce GTX 880M is the winner, but only just. (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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the video 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 the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.