GeForce GTX 285 1GB vs Radeon R9 M390X

Intro

Compare those specs to the Radeon R9 M390X, which comes with a core clock frequency of 723 MHz and a GDDR5 memory frequency of 1250 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M390X		125 Watts
GeForce GTX 285 1GB		204 Watts
	Difference: 79 Watts (63%)

Memory Bandwidth

The Radeon R9 M390X should theoretically perform a bit faster than the GeForce GTX 285 1GB in general. (explain)

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

Texel Rate

The Radeon R9 M390X is a lot (more or less 79%) better at AF than the GeForce GTX 285 1GB. (explain)

Radeon R9 M390X		92544 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 40704 (79%)

Pixel Rate

The Radeon R9 M390X should be a little bit (about 12%) more effective at AA than the GeForce GTX 285 1GB, and will be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M390X		23136 Mpixels/sec
GeForce GTX 285 1GB		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 transported across the external memory interface in one second. It's worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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