Well that sucked! Set the SATA3 to AHCI and use/try the SATA3 port. I assume when testing that you disabled any AV software, and the you did NOT install ANY of the ASUS 'Utilities' -> if you did then uninstall them, OR run MSCONFIG select Diagnostic and re-run tests.
Also, G.SKILL is using 1024K vs your 103424K sized test; also looking at their 'font' they've turned-off EVERYTHING!
Q - What OS? e.g. Windows 7 Pro x64
Before RST 'update':
After RST 'update':