Radeon HD 7770 vs Radeon RX 560

Intro

Compare all that to the Radeon RX 560, which comes with a clock speed of 1175 MHz and a GDDR5 memory speed of 1750 MHz. It also features a 128-bit bus, and makes use of a 14 nm design. It is comprised of 1024 SPUs, 64 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The Radeon RX 560 should theoretically be much faster than the Radeon HD 7770 overall. (explain)

Radeon RX 560		114688 MB/sec
Radeon HD 7770		72000 MB/sec
	Difference: 42688 (59%)

Texel Rate

The Radeon RX 560 will be a lot (more or less 88%) faster with regards to texture filtering than the Radeon HD 7770. (explain)

Radeon RX 560		75200 Mtexels/sec
Radeon HD 7770		40000 Mtexels/sec
	Difference: 35200 (88%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon RX 560 is a better choice, not by a very large margin though. (explain)

Radeon RX 560		18800 Mpixels/sec
Radeon HD 7770		16000 Mpixels/sec
	Difference: 2800 (18%)

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 (counted in MB per second) that can be transported past the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better 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 can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core 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 output rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.