With the launch of the Radeon HD 4800 series in June of last year, AMD made an evolutionary leap in their Linux support. For the first time, when introducing a brand new graphics processor (the RV770) it was greeted by same-day Linux support, compared to the past where Linux users had to wait many months for any new level of support. Not only was there this Linux support via the Catalyst driver, but there was even open-source support in the X.Org driver the very same month. In the months that followed, they then introduced CrossFire support, OverDrive, and other features to put their Linux Catalyst suite closer to their Windows driver. This morning AMD is announcing a high-end refresh of the RV770 GPU that will be known as the RV790 and is found in the Radeon HD 4890 graphics card. Is AMD continuing to play ball with Linux? We will tell you this morning as we look closely at the ASUS Radeon HD 4890 on Ubuntu Linux.