Radeon HD 6770 1GB vs Radeon RX 550

Intro

Compare those specifications to the Radeon RX 550, which comes with GPU clock speed of 1100 MHz, and 2048 MB of GDDR5 memory running at 1750 MHz through a 128-bit bus. It also features 512 Stream Processors, 32 TAUs, and 16 ROPs.

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 will be 71% faster than the Radeon HD 6770 1GB overall, because of its greater data rate. (explain)

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

Texel Rate

The Radeon HD 6770 1GB should be a little bit (approximately 2%) faster with regards to anisotropic 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

The Radeon RX 550 is a lot (approximately 22%) more effective at anti-aliasing than the Radeon HD 6770 1GB, and able to handle higher resolutions more effectively. (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: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.