GeForce GTX 285 2GB vs Radeon R9 M385X

Intro

Compare those specs to the Radeon R9 M385X, which has GPU clock speed of 1100 MHz, and 4096 MB of GDDR5 memory set to run at 1500 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 285 2GB is 66% faster than the Radeon R9 M385X in general, because of its higher bandwidth. (explain)

GeForce GTX 285 2GB		158976 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 62976 (66%)

Texel Rate

The Radeon R9 M385X will be a little bit (approximately 19%) more effective at anisotropic filtering than the GeForce GTX 285 2GB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GTX 285 2GB		51840 Mtexels/sec
	Difference: 9760 (19%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 285 2GB is a better choice, though not by far. (explain)

GeForce GTX 285 2GB		20736 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 3136 (18%)

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 (in units of MB per second) that can be transferred past the external memory interface within a second. It is worked out by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.