Radeon HD 3650 256MB vs Radeon R9 M380

Intro

Compare those specifications to the Radeon R9 M380, which features core speeds of 1000 MHz on the GPU, and 1500 MHz on the 4096 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M380 should theoretically be much faster than the Radeon HD 3650 256MB overall. (explain)

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

Texel Rate

The Radeon R9 M380 will be much (about 590%) better at texture filtering 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 is quite a bit (more or less 452%) better at full screen anti-aliasing than the Radeon HD 3650 256MB, and also should be capable of handling higher 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 (measured in MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock 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 most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.