Radeon HD 5770 vs Radeon RX 550

Intro

Compare those specifications to the Radeon RX 550, which has a clock speed of 1100 MHz and a GDDR5 memory frequency of 1750 MHz. It also makes use of a 128-bit bus, and uses a 14 nm design. It is comprised of 512 SPUs, 32 TAUs, and 16 Raster Operation 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

Theoretically speaking, the Radeon RX 550 should be much faster than the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon RX 550 should be a small bit (more or less 4%) better at AF 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 will be much (more or less 29%) faster with regards to FSAA than the Radeon HD 5770, and also should be capable of handling higher screen resolutions without slowing down too much. (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 information (counted in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core 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 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. Pixel rate is calculated by multiplying the amount of ROPs by the clock speed of the card. 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 rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.