Radeon R9 M270X vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which features a GPU core 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 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M385X should in theory be much faster than the Radeon R9 M270X overall. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon R9 M270X		72000 MB/sec
	Difference: 24000 (33%)

Texel Rate

The Radeon R9 M385X is a lot (approximately 112%) faster with regards to anisotropic filtering than the Radeon R9 M270X. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon R9 M270X		29000 Mtexels/sec
	Difference: 32600 (112%)

Pixel Rate

The Radeon R9 M385X is a lot (about 52%) faster with regards to AA than the Radeon R9 M270X, and also will be able to handle higher screen resolutions without slowing down too much. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon R9 M270X		11600 Mpixels/sec
	Difference: 6000 (52%)

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 maximum amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant 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 maximum fill rate.