Radeon R9 380 2G vs Radeon R9 M280X

Intro

Compare all of that to the Radeon R9 M280X, which has GPU core speed of 900 MHz, and 4096 MB of GDDR5 RAM running at 1375 MHz through a 128-bit bus. It also is made up of 896 SPUs, 56 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M280X		75 Watts
Radeon R9 380 2G		190 Watts
	Difference: 115 Watts (153%)

Memory Bandwidth

The Radeon R9 380 2G, in theory, should be a lot faster than the Radeon R9 M280X overall. (explain)

Radeon R9 380 2G		182400 MB/sec
Radeon R9 M280X		88000 MB/sec
	Difference: 94400 (107%)

Texel Rate

The Radeon R9 380 2G will be quite a bit (more or less 116%) better at texture filtering than the Radeon R9 M280X. (explain)

Radeon R9 380 2G		108640 Mtexels/sec
Radeon R9 M280X		50400 Mtexels/sec
	Difference: 58240 (116%)

Pixel Rate

The Radeon R9 380 2G is quite a bit (approximately 116%) more effective at full screen anti-aliasing than the Radeon R9 M280X, and able to handle higher resolutions without slowing down too much. (explain)

Radeon R9 380 2G		31040 Mpixels/sec
Radeon R9 M280X		14400 Mpixels/sec
	Difference: 16640 (116%)

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 (measured in megabytes per second) that can be moved past the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the 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 maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.