GeForce GTX 285 2GB vs Radeon R9 M395X

Intro

Compare that to the Radeon R9 M395X, which features GPU core speed of 723 MHz, and 4096 MB of GDDR5 memory running at 1250 MHz through a 256-bit bus. It also is comprised of 2048 Stream Processors, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M395X		125 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 79 Watts (63%)

Memory Bandwidth

The Radeon R9 M395X, in theory, should perform a bit faster than the GeForce GTX 285 2GB overall. (explain)

Radeon R9 M395X		160000 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 1024 (1%)

Texel Rate

The Radeon R9 M395X is quite a bit (about 79%) faster with regards to AF than the GeForce GTX 285 2GB. (explain)

Radeon R9 M395X		92544 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 40704 (79%)

Pixel Rate

The Radeon R9 M395X will be just a bit (more or less 12%) faster with regards to anti-aliasing than the GeForce GTX 285 2GB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M395X		23136 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 2400 (12%)

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 max amount of data (counted in megabytes per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the video 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 maximum amount of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.