Radeon HD 5770 vs Radeon RX 550

Intro

Compare that to the Radeon RX 550, which makes use of a 14 nm design. AMD has set the core frequency at 1100 MHz. The GDDR5 memory works 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 5770		108 Watts
	Difference: 58 Watts (116%)

Memory Bandwidth

In theory, the Radeon RX 550 should be 49% faster than the Radeon HD 5770 in general, because of its higher data rate. (explain)

Radeon RX 550		114688 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 37888 (49%)

Texel Rate

The Radeon RX 550 will be a bit (about 4%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

Radeon RX 550		35200 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 1200 (4%)

Pixel Rate

The Radeon RX 550 is much (approximately 29%) more effective at FSAA than the Radeon HD 5770, and able to handle higher screen resolutions better. (explain)

Radeon RX 550		17600 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 4000 (29%)

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 (counted in MB per second) that can be transferred past the external memory interface in one second. It's worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.