Radeon R7 M265 vs Radeon R9 M385X

Intro

Compare those specifications to the Radeon R9 M385X, which comes with a GPU core clock speed of 1100 MHz, and 4096 MB of GDDR5 RAM set to run at 1500 MHz through a 128-bit bus. It also features 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M385X will be 200% quicker than the Radeon R7 M265 overall, due to its higher data rate. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon R7 M265		32000 MB/sec
	Difference: 64000 (200%)

Texel Rate

The Radeon R9 M385X should be quite a bit (more or less 254%) better at AF than the Radeon R7 M265. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon R7 M265		17400 Mtexels/sec
	Difference: 44200 (254%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 M385X is superior to the Radeon R7 M265, by a large margin. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon R7 M265		5800 Mpixels/sec
	Difference: 11800 (203%)

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 largest amount of information (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.