GeForce GTX 285 2GB vs Radeon R9 M390X

Intro

Compare that to the Radeon R9 M390X, which comes with core speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 285 2GB		204 Watts
	Difference: 79 Watts (63%)

Memory Bandwidth

Theoretically, the Radeon R9 M390X should be just a bit faster than the GeForce GTX 285 2GB in general. (explain)

Radeon R9 M390X		160000 MB/sec
GeForce GTX 285 2GB		158976 MB/sec
	Difference: 1024 (1%)

Texel Rate

The Radeon R9 M390X is much (approximately 79%) faster with regards to anisotropic filtering than the GeForce GTX 285 2GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 40704 (79%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 M390X is a better choice, but only just. (explain)

Radeon R9 M390X		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: Bandwidth is the max amount of data (counted in megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. 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 fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.