On 2/9/2014 3:32 AM, Efraim Flashner wrote: > On Sat, 08 Feb 2014 10:20:49 -0500 > Gary Dale <garyd...@torfree.net> wrote: > >> I'm running Jessie on an AMD64 Gigabyte 970A-D3P board with an FX6100 >> processor. I had 2x4G DDR3 sticks in it but some of the programs I >> use were causing excessive thrashing. I added a 1x8G DDR3 stick (got >> a good price on it, much cheaper than adding 2x4G) which resolved the >> thrashing problem. >> >> The BIOS shows I have 16G but free shows only 12G. I also ran free on >> a machine with 2x8G DDR3 running Wheezy and it showed 16G when I ran >> free. This suggests that the kernel is handling 16G (as one would >> expect) in the general case and the issue is likely due to my setup. >> >> Since the BIOS shows the full 16G, the problem doesn't seem to be on >> the mainboard. Is there an issue with running interleaved and >> non-interleaved RAM together on the Jessie kernels? >> >> > > It sounds to me like you have some issues between your two sets of ram, > the 8G stick and the 2x4G sticks. Is there a difference in > timings/speed/voltage? I've never put much stock in people saying that > you shouldn't mix different types of ram if the price is right, but you > might need to change around the placement order. Assuming the > motherboard supports dual-channel ram, I'd make sure you have the 2x4G > sticks paired up and the 8G stick on its own channel.
According to page 16 of the manual you have an unsupported memory configuration: http://download.gigabyte.us/FileList/Manual/mb_manual_ga-970a-d3p_e.pdf If this combo will ever work, the first step is to verify the 8GB stick is in one channel and the two 4GB sticks in the other. If you still don't see all 16GB then disable rank interleaving. If that doesn't fix it, disable channel interleaving. If that doesn't fix it, you may be of luck, and will need to either swap the 8GB stick for a pair of matched 4GB sticks, or acquire another identical 8GB stick. -- Stan -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/52f76b96.9030...@hardwarefreak.com
