GA-880GA-UD3H & 16gb of G-Skill Ripjaw Ram

[DrakeFS]

This is more of an info post than anything else.

I was having massive errors using 16gb on this board.  Memtest showed every stick Solo, Duo and Trio Setups as fine.  Soon as I added a 4th stick memtest would start seeing errors.  After some trouble shooting, I swapped the MC to Ganged and memtest was happy.  I assume for some reason the board + cpu can not handle 4 sticks at 1333.  The only reason I post this is because I searched and found nothing.  I hope this will help someone in the future

CPU: Phenom II x6 1035T 2.6ghz
Board: 880GA-UD3H rev3.1
Ram: G-Skill PC10666 DDR3 1333 4x4gb

[Dark Mantis]

It could well be that the memory needed manually configuring if you were expecting it to work on auto settings in the BIOS. Two sticks are ok but four is asking a bit much.

[DrakeFS]

Well the sticks ran extremely hot on "Unganged" so the auto setup could of been the issue there.  Also, the sticks are still on auto setup the only difference to get them stable was to set the MC's to "Ganged"

[autotech]

Weird as it is usually the other way around unganged works better . I do know if you bought two kits that sometimes they wont match and cause problems. Sometimes looseing timings can help alot.

Just as a test i set mine at 1600 and ganged and starts but wont play bfbc2 for 20 minutes without stalling alot. set it back to unganged and 1600 with 9-9-9-24 and plays fine.

[DrakeFS]

The ram is not 2 separate matched sets, it is actually 1 matched (quad channel) set.  I Learned my lesson a while back about matched sets.

The only thing I can think of is that ganged forces the default speed to 1066, least I believe that is what a I read.  Can't really test the theories right now because I am fully formatting a 3tb raid 5 array...  its gonna be a while till I can restart.  This specific ram type (gskill PC10666 4gb)  seems to have issue @ 16gb with this board.  The biggest benefit is that I have 16gb of ram Stable, speed be damned.  Since this inst a gaming machine (its actually a VM server), I will live with the slight loss in performance.  Still running 9-9-9-24 btw.

[autotech]

If i am right ganged runs at 128 bit single channel where as unganged runs at 64 bit times 2. Absic is better at it than me or even dark mantis but in another thread i am sure thats what it is. I wonder if you set voltage up a nothch if it will help.  Absic made a thread about amd and memory is a good read and is a sticky.

[DrakeFS]

I already read the sticky when I was trying to get my ram stable.  It didnt really apply to the situation, as I bought the ram specifically for this mother board (DDR1333) with no intentions of overclocking.  As the system is stable now, I will most likely not be testing or changing anything.  If it aint broke, dont fix it.  I will check to see if the speed has been reduced.

[DrakeFS]

The ram is still running @ 1333mhz.  So the only change was unganged to ganged.

[Dark Mantis]

Normally unganged is the better option.