GeForce GTX 285 1GB vs Radeon R9 M385X

Intro

Compare all that to the Radeon R9 M385X, which has GPU core speed of 1100 MHz, and 4096 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also is comprised of 896 SPUs, 56 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the GeForce GTX 285 1GB will be 66% quicker than the Radeon R9 M385X overall, due to its greater data rate. (explain)

GeForce GTX 285 1GB		158976 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 62976 (66%)

Texel Rate

The Radeon R9 M385X should be a small bit (approximately 19%) more effective at anisotropic filtering than the GeForce GTX 285 1GB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
GeForce GTX 285 1GB		51840 Mtexels/sec
	Difference: 9760 (19%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 285 1GB is a better choice, but only just. (explain)

GeForce GTX 285 1GB		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: Bandwidth is the max amount of data (in units of MB per second) that can be transported over the external memory interface within a second. It's calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, 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 applied in one second. This number is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The better this number, the better the card will be at 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 that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.