ive got a bit of a dilema with my ram. ive been running 8GB (2x4GB) of this ram Corsair xms3 (CMX8GX3M2A1600C9) for ages @ the rated specs of 1600MHz 9,9,9,24,41,2T 1.65v without any problems in slots A1 and B1. i know that some motherboards will default the memory to 1333MHz but for some reason this has always defaulted to 1066MHz. in cpu-z it shows as PC3_8500F (533MHz) and in the bios in spd info it only shows 2 profiles 1066 and 1600.
yesterday i installed another kit of the same memory https://www.overclockers.co.uk/showp...odid=MY-290-CS but its showing as different memory (PC3-10666C9). in the bios it shows the 3 spd profiles 1066,1333, 1600,
when i installed it i just added the new ram to slots A2 and B2. booted into the bios and made sure the timmings were at the rated timings for 1600, 9,9,9,24,41,2T 1.65v and rebooted into windows where it shows 16GB installed (12Gb usable). at first i thought it may be a slot not working properly but i dont think this is the case.
i tried a couple of different settings to see what would happen and this is where it gets wierd.
1st i loaded optomized defaults which loads the ram at 1066MHz and in windows it showed 16Gb usable.
2nd i loaded the timings for 1333MHz. then in windows it showed 16GB (7.9 usable)
i read a thread the other day where somebody had an issue where they installed 16GB but only 12 was usable but i cant remember what he did to sort it. this has totally confused me as its an issue ive never come across before.
i took the second kit out in the end untill i can figure out the problem.
any ideas folks??
cpu-z showed slots 1,2 as PC3_8500F (533MHz) and slots 3,4 as PC3_10666C9 (1333MHz) but running at 1600MHZ
any help will be very much apreciated. thanks!