I searched everywhere with this problem nobody seems to have it. I got a z68 motherboard the sli anyway when I put the computer to sleep the computer does not recognize the hardrive. I was running two WD VelociRaptor hard drive on had the technical preview the other 8.1 everything was fine until a week in and my hardrives were nor recognized by the motherboard on wake up. so I got rid of the  drive with the tech preview and just used the one same thing. I did a complete fresh install of windows and the same thing happens I reset the bios and the same thing what is possibly wrong. now everything is fine when I do a restart but when I wake up from sleep the hard drive is not recognized.