GeForce GTX 850M vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which comes with a clock frequency of 750 MHz and a GDDR5 memory frequency of 1375 MHz. It also makes use of a 256-bit bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 850M		40 Watts
Radeon R9 M295X		125 Watts
	Difference: 85 Watts (213%)

Memory Bandwidth

The Radeon R9 M295X should theoretically perform quite a bit faster than the GeForce GTX 850M overall. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 850M		32000 MB/sec
	Difference: 144000 (450%)

Texel Rate

The Radeon R9 M295X is a lot (more or less 174%) more effective at texture filtering than the GeForce GTX 850M. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 850M		35040 Mtexels/sec
	Difference: 60960 (174%)

Pixel Rate

The Radeon R9 M295X should be much (more or less 71%) faster with regards to anti-aliasing than the GeForce GTX 850M, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GTX 850M		14016 Mpixels/sec
	Difference: 9984 (71%)

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 maximum amount of data (measured in MB per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, 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 can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core 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 applied in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's 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 rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.