Radeon R7 M260X vs Radeon R9 380 4G

Intro

Compare all that to the Radeon R9 380 4G, which comes with a clock frequency of 970 MHz and a GDDR5 memory speed of 1425 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It features 1792 SPUs, 112 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 380 4G is 185% faster than the Radeon R7 M260X overall, due to its greater data rate. (explain)

Radeon R9 380 4G		182400 MB/sec
Radeon R7 M260X		64000 MB/sec
	Difference: 118400 (185%)

Texel Rate

The Radeon R9 380 4G will be quite a bit (approximately 449%) faster with regards to anisotropic filtering than the Radeon R7 M260X. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon R7 M260X		19800 Mtexels/sec
	Difference: 88840 (449%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 380 4G is a better choice, and very much so. (explain)

Radeon R9 380 4G		31040 Mpixels/sec
Radeon R7 M260X		6600 Mpixels/sec
	Difference: 24440 (370%)

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 (in units of MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.