With my 64GB SSD, it created two / (root) partitions. One current install and one for next install. I then have all data on rotating drive.
I always partition in advance and now use gpt partitioning as Ubuntu will boot from gpt with either UEFI or BIOS. Only if installing Windows is the issue of Windows only boots from gpt with UEFI.
I do not know about AMD, there was a while back an issue of support on the very new 7000 series cards from AMD's linux driver.
fred@fred-Precise:~$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sdd3 28G 10G 17G 39% /
udev 2.0G 12K 2.0G 1% /dev
tmpfs 791M 1.1M 790M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 2.0G 140K 2.0G 1% /run/shm
/dev/sdc2 100G 34G 67G 34% /mnt/shared
/dev/sdc6 97G 49G 43G 54% /mnt/data
/dev/sdd4 28G 4.8G 22G 19% /media/Quantal
This may have changed:
On the proprietary driver side, the AMD Catalyst 12.11 Beta Linux graphics driver was used. For this initial testing, three discrete graphics cards from the AMD Radeon HD 5000/6000 series were used, since pre-HD5000 graphics cards are now on the Catalyst Legacy driver and the latest-generation Radeon HD 7000 series hardware still doesn't fully work with the open-source Gallium3D "RadeonSI" driver.