BIOS settings for ASUS mobo

I just purchased the Asus P7P55D-E LX motherboard with an intel i5-760 and an intel 40gb ssd. After assembling the parts and booting up it, it ran just fine off the default bios and installed windows 7 just fine. My problem is that in the BIOS it says that I do not have any SATA devices attached. However, after booting up from the POST screen (as well as the device list in Windows) it says that it recognizes the drive (drivers are full up to date) but is only operating at 3 gb/s, which somewhat defeats the purpose of getting an ssd.
I'm new to assembling my own pc and adjusting the BIOS. Can anyone help me figure out what I need to do to boost the transfer rate to 6 gb/s? Here's a comprehensive list of my current setup:

Motherboard: ASUS P7P55D-E LX
Processor: Intel i5-760
Hard Drive: Intel Solid State 40gb
Disc Drive: HP dvd1040
PSU: Corsair CMPSU-750TX
RAM: 8GB Corsair Vengeance (2 X 4GB)
OS: Windows OEM 7 Home Premium 64-Bit

Any other tips to boost my performance would be greatly appreciated as the focus for my pc is for audio/video editing.

Reply 1 : BIOS settings for ASUS mobo

The left two ( upper and lower ) SATA channels labeled SATA_6G_1 and SATA_6G_2 are the 6GB channels. However, depending on the model number SSD, two different Intel SSD's listed this: Interface: Compatible with SATA 1.5 Gb/s and 3 Gb/s
So, check the specs on the SSD.