Radeon HD 5770 vs Radeon R9 390X 8G

Intro

Compare those specs to the Radeon R9 390X 8G, which comes with a core clock frequency of 1050 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 512-bit bus, and makes use of a 28 nm design. It features 2816 SPUs, 176 Texture Address Units, and 64 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 167 Watts (155%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should perform a lot faster than the Radeon HD 5770 overall. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 307200 (400%)

Texel Rate

The Radeon R9 390X 8G should be much (more or less 444%) more effective at texture filtering than the Radeon HD 5770. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 150800 (444%)

Pixel Rate

The Radeon R9 390X 8G will be a lot (approximately 394%) better at AA than the Radeon HD 5770, and will be capable of handling higher resolutions more effectively. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 53600 (394%)

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.