GeForce GTX 285 1GB vs Radeon R9 380X

Intro

Compare that to the Radeon R9 380X, which comes with GPU clock speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also is made up of 2048 Stream Processors, 128 TAUs, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 380X		190 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 14 Watts (7%)

Memory Bandwidth

The Radeon R9 380X, in theory, should be a bit faster than the GeForce GTX 285 1GB overall. (explain)

Radeon R9 380X		182400 MB/sec
GeForce GTX 285 1GB		158976 MB/sec
	Difference: 23424 (15%)

Texel Rate

The Radeon R9 380X will be much (about 140%) faster with regards to anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 72320 (140%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon R9 380X is the winner, by a large margin. (explain)

Radeon R9 380X		31040 Mpixels/sec
GeForce GTX 285 1GB		20736 Mpixels/sec
	Difference: 10304 (50%)

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 (counted in MB per second) that can be moved across the external memory interface in a second. It's worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core 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 processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.