GeForce GTX 880M vs Radeon R9 M295X

Intro

Compare all that to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory runs at a speed of 1375 MHz on this card. It features 2048 SPUs as well as 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTX 880M		130 Watts
	Difference: 5 Watts (4%)

Memory Bandwidth

Theoretically, the Radeon R9 M295X should perform a lot faster than the GeForce GTX 880M overall. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 880M		128000 MB/sec
	Difference: 48000 (38%)

Texel Rate

The GeForce GTX 880M will be quite a bit (about 27%) more effective at anisotropic filtering than the Radeon R9 M295X. (explain)

GeForce GTX 880M		122112 Mtexels/sec
Radeon R9 M295X		96000 Mtexels/sec
	Difference: 26112 (27%)

Pixel Rate

The GeForce GTX 880M will be quite a bit (more or less 27%) better at FSAA than the Radeon R9 M295X, and also will be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 880M		30528 Mpixels/sec
Radeon R9 M295X		24000 Mpixels/sec
	Difference: 6528 (27%)

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 largest amount of data (in units of MB per second) that can be transferred over the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.