I was up all last night putting together my latest build, which has an Intel 520 series SSD as its one and only drive. The motherboard is a Gigabyte GA-Z77-DS3H (a UEFI-capable board) with a Core i5-3570K CPU. I left most of the BIOS settings at defaults for my Windows 7 64-bit install, except for putting the SATA controller in AHCI mode. So I ended up with the SSD being formatted GPT. I don't remember Windows setup asking me whether I wanted to format the disk as GPT or MBR. Either it happened automagically, or I was tired and missed it. At 120 GB, the SSD is not big enough to require GPT, so is there any particular advantage to sticking with a GPT-'ed SSD? As far as I know, the main selling points of GPT are: -many more partitions -access to very large (>2 TB) disks.