Radeon HD 5850 vs Radeon R9 M380

Intro

Compare those specifications to the Radeon R9 M380, which features a core clock frequency of 1000 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is made up of 640 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 5850 should be 33% quicker than the Radeon R9 M380 in general, because of its higher data rate. (explain)

Radeon HD 5850		128000 MB/sec
Radeon R9 M380		96000 MB/sec
	Difference: 32000 (33%)

Texel Rate

The Radeon HD 5850 should be a lot (approximately 31%) more effective at texture filtering than the Radeon R9 M380. (explain)

Radeon HD 5850		52200 Mtexels/sec
Radeon R9 M380		40000 Mtexels/sec
	Difference: 12200 (31%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5850 is superior to the Radeon R9 M380, by far. (explain)

Radeon HD 5850		23200 Mpixels/sec
Radeon R9 M380		16000 Mpixels/sec
	Difference: 7200 (45%)

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 max amount of data (counted in MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.