GeForce GTX 285 2GB vs Radeon R9 M295X

Intro

Compare those specifications to the Radeon R9 M295X, which has a core clock speed of 750 MHz and a GDDR5 memory speed of 1375 MHz. It also uses a 256-bit memory bus, and makes use of a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X		125 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 79 Watts (63%)

Memory Bandwidth

Theoretically, the Radeon R9 M295X should perform just a bit faster than the GeForce GTX 285 2GB overall. (explain)

Radeon R9 M295X		176000 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 17024 (11%)

Texel Rate

The Radeon R9 M295X is a lot (approximately 85%) better at AF than the GeForce GTX 285 2GB. (explain)

Radeon R9 M295X		96000 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 44160 (85%)

Pixel Rate

The Radeon R9 M295X is a little bit (approximately 16%) better at FSAA than the GeForce GTX 285 2GB, and also will be capable of handling higher screen resolutions more effectively. (explain)

Radeon R9 M295X		24000 Mpixels/sec
GeForce GTX 285 2GB		20736 Mpixels/sec
	Difference: 3264 (16%)

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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied per second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the graphics 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 amount of pixels the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.