Radeon HD 4850 512MB vs Radeon RX 550

Intro

Compare that to the Radeon RX 550, which has core speeds of 1100 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 memory. It features 512 SPUs as well as 32 TAUs 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 512MB		110 Watts
	Difference: 60 Watts (120%)

Memory Bandwidth

In theory, the Radeon RX 550 should be 80% quicker than the Radeon HD 4850 512MB overall, due to its higher data rate. (explain)

Radeon RX 550		114688 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 51136 (80%)

Texel Rate

The Radeon RX 550 will be a lot (about 41%) more effective at AF than the Radeon HD 4850 512MB. (explain)

Radeon RX 550		35200 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 10200 (41%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon RX 550 is the winner, by a large margin. (explain)

Radeon RX 550		17600 Mpixels/sec
Radeon HD 4850 512MB		10000 Mpixels/sec
	Difference: 7600 (76%)

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 maximum amount of data (measured in MB per second) that can be moved over the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.