Radeon R9 285 vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which uses a 28 nm design. AMD has clocked the core frequency at 1100 MHz. The GDDR5 memory runs at a speed of 1500 MHz on this specific model. It features 896 SPUs as well as 56 TAUs and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should be a lot faster than the Radeon R9 M385X in general. (explain)

Radeon R9 285		176000 MB/sec
Radeon R9 M385X		96000 MB/sec
	Difference: 80000 (83%)

Texel Rate

The Radeon R9 285 should be a lot (about 67%) faster with regards to texture filtering than the Radeon R9 M385X. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R9 M385X		61600 Mtexels/sec
	Difference: 41216 (67%)

Pixel Rate

The Radeon R9 285 will be much (about 67%) more effective at FSAA than the Radeon R9 M385X, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R9 M385X		17600 Mpixels/sec
	Difference: 11776 (67%)

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 information (in units of megabytes per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better 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 amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher 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 most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.