Radeon HD 6770 1GB vs Radeon RX 550

Intro

Compare those specifications to the Radeon RX 550, which features core clock speeds of 1100 MHz on the GPU, and 1750 MHz on the 2048 MB of GDDR5 RAM. 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 6770 1GB		108 Watts
	Difference: 58 Watts (116%)

Memory Bandwidth

In theory, the Radeon RX 550 is 71% quicker than the Radeon HD 6770 1GB overall, because of its higher bandwidth. (explain)

Radeon RX 550		114688 MB/sec
Radeon HD 6770 1GB		67200 MB/sec
	Difference: 47488 (71%)

Texel Rate

The Radeon HD 6770 1GB will be just a bit (approximately 2%) better at texture filtering than the Radeon RX 550. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
Radeon RX 550		35200 Mtexels/sec
	Difference: 800 (2%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 550 is the winner, and very much so. (explain)

Radeon RX 550		17600 Mpixels/sec
Radeon HD 6770 1GB		14400 Mpixels/sec
	Difference: 3200 (22%)

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 information (measured in megabytes per second) that can be transferred across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output 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 potential to reach the max fill rate.