It doesn't matter if you own a motherboard with a legacy BIOS or one sporting a newfangled UEFI BIOS, the RAIDR Express from Asus ROG will play nice either way. It's a PCI-E based solid state drive (SSD), and supposedly the first of its kind with a DuoMode feature that allows it to work with either type of BIOS. Just flip the hardware switch to the appropriate setting and you'll be off an running with a spectacularly fast SSD.
How fast? According to Asus, the RAIDR Express can perform sequential reads at up to 830MB/s and sequential writes at up to 810MB/s, along with 100,000 4K read/write IOPS. The drive uses the latest generation dual LSI SandForce controller and Toshiba-made 19nm 16k-page size multi-level cell (MLC) sync-NAND flash memory chips.
You can run the RAIDR Express as a standalone drive or configure it to act as a solid state cache for high-capacity hard drives up to 4TB via ROG HybriDisk technology.
It's a 240GB capacity drive with a double-sided metal shielding. Asus rates the MTBF (mean time before failure) at 620,000 hours, which is more than 70 years!