Radeon HD 5550 vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which makes use of a 28 nm design. AMD has clocked the core speed at 900 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this model. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M275X should theoretically be much faster than the Radeon HD 5550 in general. (explain)

Radeon R9 M275X		72000 MB/sec
Radeon HD 5550		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon R9 M275X will be a lot (about 309%) faster with regards to anisotropic filtering than the Radeon HD 5550. (explain)

Radeon R9 M275X		36000 Mtexels/sec
Radeon HD 5550		8800 Mtexels/sec
	Difference: 27200 (309%)

Pixel Rate

The Radeon R9 M275X is quite a bit (about 227%) more effective at full screen anti-aliasing than the Radeon HD 5550, and also will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon HD 5550		4400 Mpixels/sec
	Difference: 10000 (227%)

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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the 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 can be applied in one second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.