Radeon HD 3690/3830 vs Radeon R9 M380

Intro

Compare that to the Radeon R9 M380, which comes with clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M380 should be quite a bit faster than the Radeon HD 3690/3830 overall. (explain)

Radeon R9 M380		96000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 69504 (262%)

Texel Rate

The Radeon R9 M380 will be quite a bit (about 274%) more effective at texture filtering than the Radeon HD 3690/3830. (explain)

Radeon R9 M380		40000 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 29312 (274%)

Pixel Rate

The Radeon R9 M380 is quite a bit (approximately 50%) more effective at full screen anti-aliasing than the Radeon HD 3690/3830, and should be able to handle higher resolutions while still performing well. (explain)

Radeon R9 M380		16000 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 5312 (50%)

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 data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the core 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 rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.