Radeon HD 4790 vs Radeon RX 560

Intro

Compare those specs to the Radeon RX 560, which uses a 14 nm design. AMD has clocked the core frequency at 1175 MHz. The GDDR5 RAM works at a frequency of 1750 MHz on this specific card. It features 1024 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon RX 560 is 12% quicker than the Radeon HD 4790 in general, due to its higher data rate. (explain)

Radeon RX 560		114688 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 12288 (12%)

Texel Rate

The Radeon RX 560 will be quite a bit (approximately 292%) faster with regards to texture filtering than the Radeon HD 4790. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 56000 (292%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon RX 560 is the winner, by far. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 9200 (96%)

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 (in units of megabytes per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the bus width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are applied per second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, 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 most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.