GeForce GTX 285 2GB vs Radeon R9 M280X

Intro

Compare that to the Radeon R9 M280X, which has GPU clock speed of 900 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 129 Watts (172%)

Memory Bandwidth

Performance-wise, the GeForce GTX 285 2GB should theoretically be a lot superior to the Radeon R9 M280X in general. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 70976 (81%)

Texel Rate

The GeForce GTX 285 2GB is a small bit (approximately 3%) faster with regards to anisotropic filtering than the Radeon R9 M280X. (explain)

GeForce GTX 285 2GB		51840 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 1440 (3%)

Pixel Rate

The GeForce GTX 285 2GB will be a lot (about 44%) faster with regards to full screen anti-aliasing than the Radeon R9 M280X, and should be able to handle higher resolutions without losing too much performance. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 6336 (44%)

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 information (measured in MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better this number, the better the 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 could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.