Radeon HD 7790 vs Radeon RX 550

Intro

Compare all that to the Radeon RX 550, which features a GPU core clock speed of 1100 MHz, and 2048 MB of GDDR5 RAM set to run at 1750 MHz through a 128-bit bus. It also is comprised of 512 Stream Processors, 32 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7790		4330 points
Radeon RX 550		3507 points
	Difference: 823 (23%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 550		50 Watts
Radeon HD 7790		85 Watts
	Difference: 35 Watts (70%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 550 is 19% faster than the Radeon HD 7790 in general, because of its higher bandwidth. (explain)

Radeon RX 550		114688 MB/sec
Radeon HD 7790		96000 MB/sec
	Difference: 18688 (19%)

Texel Rate

The Radeon HD 7790 should be a lot (more or less 59%) more effective at anisotropic filtering than the Radeon RX 550. (explain)

Radeon HD 7790		56000 Mtexels/sec
Radeon RX 550		35200 Mtexels/sec
	Difference: 20800 (59%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon RX 550 is superior to the Radeon HD 7790, though not by far. (explain)

Radeon RX 550		17600 Mpixels/sec
Radeon HD 7790		16000 Mpixels/sec
	Difference: 1600 (10%)

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 maximum amount of information (measured in megabytes per second) that can be transported across the external memory interface in a second. The number is worked out by multiplying the bus width by its memory speed. In the case of 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. 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 fill rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.