Radeon HD 4850 X2 1GB vs Radeon RX 550

Intro

Compare all of that to the Radeon RX 550, which makes use of a 14 nm design. AMD has clocked the core speed at 1100 MHz. The GDDR5 RAM runs at a frequency of 1750 MHz on this specific card. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550		50 Watts
Radeon HD 4850 X2 1GB		250 Watts
	Difference: 200 Watts (400%)

Memory Bandwidth

Performance-wise, the Radeon HD 4850 X2 1GB should in theory be a bit superior to the Radeon RX 550 overall. (explain)

Radeon HD 4850 X2 1GB		127104 MB/sec
Radeon RX 550		114688 MB/sec
	Difference: 12416 (11%)

Texel Rate

The Radeon HD 4850 X2 1GB will be quite a bit (about 42%) better at AF than the Radeon RX 550. (explain)

Radeon HD 4850 X2 1GB		50000 Mtexels/sec
Radeon RX 550		35200 Mtexels/sec
	Difference: 14800 (42%)

Pixel Rate

The Radeon HD 4850 X2 1GB is a little bit (approximately 14%) better at FSAA than the Radeon RX 550, and also will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 4850 X2 1GB		20000 Mpixels/sec
Radeon RX 550		17600 Mpixels/sec
	Difference: 2400 (14%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could 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 Render Output Units 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.