The Most Comprehensive AMD Radeon Linux Graphics Comparison

Radeon HD 6450: Finally we are onto the Radeon HD 6000 series. The first parts of this GPU family (codenames in the "Northern Islands" series) were released in October of 2010. The first bits of open-source support, however, did not arrive until this January. This first open-source drop for the HD 6000 series also did not support the Radeon HD 6900 "Cayman" series, but just the earlier ASICs. This initial open-source support was buggy. The Cayman series was not supported with acceleration until this May while kernel mode-setting came in March, but in February they did publish some documentation. The Radeon HD 6000 series support came around quicker than the HD 5000 series and many previous generations, but it still was several months. The Catalyst support is meanwhile available at launch and Intel pushes their open-source support before launch.

The Radeon HD 6450 uses the Calcos GPU and this PowerColor board is running it at 625MHz and its 1GB of 64-bit DDR3 video memory is at 667MHz.

Radeon HD 6570: The Radeon HD 6570 is a Turks part with this Sapphire model operating at 650MHz with 512MB of 1000MHz GDDR3 memory. While it was another slow start in bringing up the open-source Radeon HD 6000 series support, with the latest code the level of support is effectively comparable to that of previous AMD/ATI GPUs on Radeon, and of course, the same set of limitations.

Radeon HD 6770: The Radeon HD 6770 isn't a true Northern Islands part but it's effectively the same as a Radeon HD 5770 with using a Juniper XT core. There is 1GB of video memory, an 850MHz core, and 1200MHz memory clock.