well i have this MOBO http://www.asus.com/Motherboards/H61MPRO/ and i just bought KINGSTON HX313C9FBK2/8 8GB (2X4GB) DDR3 1333MHZ HYPERX FURY BLACK SERIES DUAL CHANNEL KIT...well when i open cpu-z the rams run at maxbandwidth 666mhz...i am going to bios and i cant change them to run at 1333mhz...my cpu http://ark.intel.com/products/53422/Intel-Core-i3-2100-Processor-3M-Cache-3_10-GHz