So purchased my first gaming rig that my friend is helping me build, and have a really simple question. After opening my power supply (ocz 500w) we realized they left out the sata cable on accident, which is very annoying. I've contacted customer services and I'm sure ill have one sent to me but I really don't want to have to wait 3-5 more business days to get started! Can I go to bestbuy and buy one or are mixing sata cables from different companies a big no no?