corsaris Posted October 15, 2009 Share Posted October 15, 2009 I have an ASUS P6T DELUXE V2 mobo, Intel Core I7-920 with (6GB) 3 x 2GB TR3X6G1600C8D RAM placed in the orange slots. When I use AUTO settings in the BIOS for RAM, all 6GB are detected running @ 1066 MHZ. :biggrin: When I use XMP, then only 4GB from 6GB are detected in BIOS and Win XP x64, but CPUZ (Memory TAB) detects 6GB. :mad: When I use XMP settings and change RAM frequency manually to 1333 MHz, all 6GB are detected. :biggrin: When I use XMP settings and change RAM frequency manually to 139x MHz or less, all 6GB are detected. :biggrin: When I use XMP settings and change RAM frequency to 140x MHz or more, only 4GB from 6GB are detected in BIOS and Win XP x64, but CPUZ (Memory TAB) detects 6GB. :mad: When not all RAM is detected, the middle orange RAM slot is the one not counted. I know that Intel I7 920 supports RAM frequency up to 1066MHz, but since RAM can perform better, I would like to take the system to the 1600MHz limit. However, I cannot make BIOS and Win XP x64 to detect full 6GB of mem when RAM freq is >= 1400 MHz. What can I do to make BIOS detect full 6GB @ 1600MHz? Link to comment Share on other sites More sharing options...
Corsair Employees RAM GUY Posted October 15, 2009 Corsair Employees Share Posted October 15, 2009 I would test all of the modules one at a time to be sure one is not failing and if they all work properly one up that would suggest it may be the MB or CPU but I would check for bent pins in the CPU socket if the modules all work one up. Link to comment Share on other sites More sharing options...
corsaris Posted October 16, 2009 Author Share Posted October 16, 2009 I would test all of the modules one at a time to be sure one is not failing and if they all work properly one up that would suggest it may be the MB or CPU but I would check for bent pins in the CPU socket if the modules all work one up. a) Should I check each DIMM using AUTO settings or XMP settings? b) In which DIMM socket should I test DIMMs? Orange? Black? All? I'm pretty sure DIMM sockets are ok, but I never checked CPU socket. Link to comment Share on other sites More sharing options...
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