Radeon HD 4770 vs Radeon RX 550

Intro

Compare those specifications 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 works at a frequency of 1750 MHz on this particular card. It features 512 SPUs as well as 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 4770		80 Watts
	Difference: 30 Watts (60%)

Memory Bandwidth

The Radeon RX 550, in theory, should perform much faster than the Radeon HD 4770 in general. (explain)

Radeon RX 550		114688 MB/sec
Radeon HD 4770		51200 MB/sec
	Difference: 63488 (124%)

Texel Rate

The Radeon RX 550 will be a lot (more or less 47%) more effective at texture filtering than the Radeon HD 4770. (explain)

Radeon RX 550		35200 Mtexels/sec
Radeon HD 4770		24000 Mtexels/sec
	Difference: 11200 (47%)

Pixel Rate

The Radeon RX 550 is much (more or less 47%) more effective at FSAA than the Radeon HD 4770, and also should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon RX 550		17600 Mpixels/sec
Radeon HD 4770		12000 Mpixels/sec
	Difference: 5600 (47%)

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 information (measured in megabytes per second) that can be transported past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 are applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at 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 video 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 ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.