Radeon HD 3650 256MB vs Radeon R9 M380

Intro

Compare all of that to the Radeon R9 M380, which features core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M380 should in theory be much better than the Radeon HD 3650 256MB in general. (explain)

Radeon R9 M380		96000 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 70400 (275%)

Texel Rate

The Radeon R9 M380 is a lot (more or less 590%) more effective at AF than the Radeon HD 3650 256MB. (explain)

Radeon R9 M380		40000 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 34200 (590%)

Pixel Rate

The Radeon R9 M380 will be quite a bit (approximately 452%) more effective at full screen anti-aliasing than the Radeon HD 3650 256MB, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 M380		16000 Mpixels/sec
Radeon HD 3650 256MB		2900 Mpixels/sec
	Difference: 13100 (452%)

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 information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR type RAM, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can 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 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 fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.