Radeon HD 5550 vs Radeon R9 M390X

Intro

Compare all of that to the Radeon R9 M390X, which has GPU clock speed of 723 MHz, and 4096 MB of GDDR5 RAM set to run at 1250 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 Texture Address Units, and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should be quite a bit faster than the Radeon HD 5550 overall. (explain)

Radeon R9 M390X		160000 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 147200 (1150%)

Texel Rate

The Radeon R9 M390X is a lot (more or less 952%) faster with regards to AF than the Radeon HD 5550. (explain)

Radeon R9 M390X		92544 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 83744 (952%)

Pixel Rate

The Radeon R9 M390X is quite a bit (approximately 426%) faster with regards to full screen anti-aliasing than the Radeon HD 5550, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M390X		23136 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 18736 (426%)

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 (counted in megabytes per second) that can be transferred over the external memory interface in one second. It is calculated by multiplying the interface 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 ANOTHER 2x. The higher the bandwidth is, the faster 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 amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka 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 bandwidth is, the lower the ability to reach the maximum fill rate.