Radeon HD 4550 512MB vs Radeon R9 M275X

Intro

Compare those specifications to the Radeon R9 M275X, which comes with core clock speeds of 900 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
Radeon R9 M275X		50 Watts
	Difference: 25 Watts (100%)

Memory Bandwidth

The Radeon R9 M275X should in theory be a lot faster than the Radeon HD 4550 512MB overall. (explain)

Radeon R9 M275X		72000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 59200 (463%)

Texel Rate

The Radeon R9 M275X will be quite a bit (more or less 650%) faster with regards to texture filtering than the Radeon HD 4550 512MB. (explain)

Radeon R9 M275X		36000 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 31200 (650%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon R9 M275X is a better choice, and very much so. (explain)

Radeon R9 M275X		14400 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 12000 (500%)

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 data (measured in megabytes per second) that can be transferred across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.