I got 6 GB of new RAM today for Christmas, but seem to be having some problems and need some help. I have a Gigabyte EX58-Extreme. I have a 6GB kit from OCZ (OCZ3G1600LV6GK) DDR3 1600 8-8-8-24 1.65v. Then today I added a 6GB kit from Corsair (CMP6GX3M3A1600C8) DDR3 1600 8-8-8-24 1.65v. However in windows it shows I have 12GB with 8GB available. It only shows 8GB on POST, but shows 12GB in CPUZ and Memtest86+ shows no problems. Any ideas?