GeForce GTX 880M vs Radeon R9 M275X

Intro

Compare that to the Radeon R9 M275X, which has core clock speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X		50 Watts
GeForce GTX 880M		130 Watts
	Difference: 80 Watts (160%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 880M will be 78% quicker than the Radeon R9 M275X overall, because of its greater bandwidth. (explain)

GeForce GTX 880M		128000 MB/sec
Radeon R9 M275X		72000 MB/sec
	Difference: 56000 (78%)

Texel Rate

The GeForce GTX 880M is a lot (about 239%) faster with regards to anisotropic filtering than the Radeon R9 M275X. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon R9 M275X		36000 Mtexels/sec
	Difference: 86112 (239%)

Pixel Rate

The GeForce GTX 880M should be a lot (more or less 112%) more effective at anti-aliasing than the Radeon R9 M275X, and also will be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon R9 M275X		14400 Mpixels/sec
	Difference: 16128 (112%)

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 data (in units of megabytes per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock 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 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 reach the maximum fill rate.