Hi all, its been a long time! I just upgraded from 6gb to 12gb RAM in my main machine (in sig), the kit i bought was the Crucial 3x4gb DDR3 1600mhz (1.5v). First i try a straight swap, but the machine doesnt boot at all. So i try reducing the BCLK - turns out it will boot at 199, but not 200 (at which it was rock solid before). Also LinX runs into errors at this setting. I always thought that it was only the number of banks filled that would cause issues, not the total amount of RAM (which is all detected fine by POST btw). Anyone else had issues going from 3x2gb to 3x4gb?
hello, My mate had the same problem, he has the same set-up as you, he had to reduce overclock to get 12gb of ram to run. The 12 gig would not o/c the same as 6gig did .I do not know the reason for this.
You may need to increase the QPI/VTT voltage a notch or 2, or adjust the timings. It's also worth resetting the BIOS if you haven't already done so.
I changed from 6gb OCZ gold 3x2gb to my 12gb patriot set. Didn't even have to tweak a thing. Plug in and boot up at same bclk frequency which is also 200.
think iv sorted it - for some reason the RAM was setting itself to CL7 which is weird. It worked at 1200mhz as youd expect. so i loosened the timings to be CL10 (which is what the website says, although the packaging says CL9) and its running. doing a LinX test now, but all looks fine. i also put an extra 0.04v through the RAM just in case (so its at 1.54v not 1.5v).
well that was helpful and I'd say now you've set it to CL10, run the test of LinuX, if it comes back ok then I'd probably drop the voltage back down to 1.5v and run the test again obviously
