Radeon HD 5770 vs Radeon R9 390 8G

Intro

Compare all of that to the Radeon R9 390 8G, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM runs at a speed of 1500 MHz on this particular card. It features 2560 SPUs as well as 160 Texture Address Units and 64 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

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

Memory Bandwidth

The Radeon R9 390 8G, in theory, should perform quite a bit faster than the Radeon HD 5770 overall. (explain)

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

Texel Rate

The Radeon R9 390 8G is quite a bit (more or less 371%) more effective at anisotropic filtering than the Radeon HD 5770. (explain)

Radeon R9 390 8G		160000 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 126000 (371%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 390 8G is superior to the Radeon HD 5770, by far. (explain)

Radeon R9 390 8G		64000 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 50400 (371%)

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 max amount of data (counted in megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's 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 amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.