Radeon R9 285 vs Radeon R9 M270X

Intro

Compare that to the Radeon R9 M270X, which comes with a core clock speed of 725 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It features 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 should be quite a bit faster than the Radeon R9 M270X overall. (explain)

Radeon R9 285		176000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 104000 (144%)

Texel Rate

The Radeon R9 285 will be much (about 255%) better at texture filtering than the Radeon R9 M270X. (explain)

Radeon R9 285		102816 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 73816 (255%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 285 is superior to the Radeon R9 M270X, and very much so. (explain)

Radeon R9 285		29376 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 17776 (153%)

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 largest amount of information (counted in megabytes per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is worked out by multiplying the total amount of texture units of the card 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 maximum amount of pixels the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.