running at 1066 did you check XMP on the mem sticks that might be your issues
Some boards you can simply change it to the rated speed others might need some work to make it happen ussually overclocking will set it right but should be set correctly if the board supports that speed
Computer type PC/Desktop System Manufacturer/Model Number Built by me FX - Series Scorpious OS Windows 7 Home Premium 64bit sp1 CPU Vishera FX 8350 Oc' 4.812Ghz 1.488 V-core full load 50c Motherboard Asus Sabertooth 990fx rev 2.0 Memory 16gb Corsair Vengeance ram 1600mhz Oc'ed to 1750mhz Graphics Card VisionTek HD7970 Ghz.ed Bios Crossfire 1150/1560 power 10% Sound Card AC97 Monitor(s) Displays 27" ViewSonic 1920/1080dp hdmi 37in vizio hdmi dual monitors Screen Resolution 1920x1080 27"- 1920x1080 37"
Keyboard Logitech wireless keyboard Mouse Logitech wireless mouse PSU HX1050w Corsair Silver 80plus certified crosfire/sli Case Thermaltake Element V Cooling Antec 620 Water cooling system and 4 120 mm LED fans Hard Drives Ocz Agility 120Gb SSD Seagate baracuda 500 Gb WD Mybook 500Gb Internet Speed Cable 25+ mb Antivirus WebRoot Spysweeper with Antivirus Browser IE-9, Chrome, Opera Other Info I have 2 systems FX AM3+ 8350-K15 Oc'ed 4.812Ghz AM2+ 965 BE Stock 3.4 Ghz Both stable Both Gaming Rigs Also Hp Notebook 1.65 ghz Dual core amd E-450 8gb Patriot Ram DDR3 Discrete Gpu Hd6320 dedicated ram 1973 mb 15.5 screen
Just gone back into BIOS, dunno if its anything to do with XMP as you mentioned as im new to all this stuff but i changed the MCH freq latch to 200mhz and the SPD to 4.00 and its sorted it.
Computer type PC/Desktop System Manufacturer/Model Number Built by me FX - Series Scorpious OS Windows 7 Home Premium 64bit sp1 CPU Vishera FX 8350 Oc' 4.812Ghz 1.488 V-core full load 50c Motherboard Asus Sabertooth 990fx rev 2.0 Memory 16gb Corsair Vengeance ram 1600mhz Oc'ed to 1750mhz Graphics Card VisionTek HD7970 Ghz.ed Bios Crossfire 1150/1560 power 10% Sound Card AC97 Monitor(s) Displays 27" ViewSonic 1920/1080dp hdmi 37in vizio hdmi dual monitors Screen Resolution 1920x1080 27"- 1920x1080 37"
Keyboard Logitech wireless keyboard Mouse Logitech wireless mouse PSU HX1050w Corsair Silver 80plus certified crosfire/sli Case Thermaltake Element V Cooling Antec 620 Water cooling system and 4 120 mm LED fans Hard Drives Ocz Agility 120Gb SSD Seagate baracuda 500 Gb WD Mybook 500Gb Internet Speed Cable 25+ mb Antivirus WebRoot Spysweeper with Antivirus Browser IE-9, Chrome, Opera Other Info I have 2 systems FX AM3+ 8350-K15 Oc'ed 4.812Ghz AM2+ 965 BE Stock 3.4 Ghz Both stable Both Gaming Rigs Also Hp Notebook 1.65 ghz Dual core amd E-450 8gb Patriot Ram DDR3 Discrete Gpu Hd6320 dedicated ram 1973 mb 15.5 screen
Computer type PC/Desktop System Manufacturer/Model Number Built by me FX - Series Scorpious OS Windows 7 Home Premium 64bit sp1 CPU Vishera FX 8350 Oc' 4.812Ghz 1.488 V-core full load 50c Motherboard Asus Sabertooth 990fx rev 2.0 Memory 16gb Corsair Vengeance ram 1600mhz Oc'ed to 1750mhz Graphics Card VisionTek HD7970 Ghz.ed Bios Crossfire 1150/1560 power 10% Sound Card AC97 Monitor(s) Displays 27" ViewSonic 1920/1080dp hdmi 37in vizio hdmi dual monitors Screen Resolution 1920x1080 27"- 1920x1080 37"
Keyboard Logitech wireless keyboard Mouse Logitech wireless mouse PSU HX1050w Corsair Silver 80plus certified crosfire/sli Case Thermaltake Element V Cooling Antec 620 Water cooling system and 4 120 mm LED fans Hard Drives Ocz Agility 120Gb SSD Seagate baracuda 500 Gb WD Mybook 500Gb Internet Speed Cable 25+ mb Antivirus WebRoot Spysweeper with Antivirus Browser IE-9, Chrome, Opera Other Info I have 2 systems FX AM3+ 8350-K15 Oc'ed 4.812Ghz AM2+ 965 BE Stock 3.4 Ghz Both stable Both Gaming Rigs Also Hp Notebook 1.65 ghz Dual core amd E-450 8gb Patriot Ram DDR3 Discrete Gpu Hd6320 dedicated ram 1973 mb 15.5 screen