You need (A)dvanced (H)ost (C)ontroller (I)nterface AHCI active in BIOS for your SSD. It doesn't matter how fast your SSD is, it will be limited by the speed of your SATA ports, which I believe are SATA II on our G73s. I think you should use the MBR boot config not the UEFI. I don't see how any of this relates to your internet speeds, since you say everything is booting up fine. Have you verified that another computer has high speed internet, and that it is only your G73 that is slow?
Asus Maximus V Extreme BIOS 1903, see specs above avatar.
Asus G73 jh A1 laptop, BIOS 213, vBIOS OD2, 8 GB Ram, 240 GB Intel SSD, 180 GB Intel SSD. Win 7 Pro. Purchased new from PowerNotebooks.com in May 2010.
(both have 1920X1080 hd screens, mine above, hers below )
Asus G73 Sw XR1 laptop 8 GB Ram, 160 GB Intel SSD, 80 GB Intel SSD. Purchased used >Ebay 1/10/13, Did clean install of Windows 7