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Samsung 30 nm 16GB 4x4 thread

post #1 of 7
Thread Starter 
The reason I'm making a new thread instead of using the other samsung thread: it seems pretty clear that 4x4 users aren't getting as high OC as the 2x4 users, and people often don't state whether the results they are getting are for a 2x4 setup or 4x4. So this thread is partially for people to see what other 4x4 users are getting and be able to compare.

The other more important reason is, I'm trying to get some help wink.gif I'm trying to get my stable OC as high as I can, and would like some advice and/or help. I'm a little disappointed and I want to see if I can get a little better.

Currently, I have two stable OCs that I am considering (prime95 ~1 hour no errors):

1) 10-10-10-28-2N 2000 Mhz

2) 9-9-9-24-1N 1866 Mhz

These OCs are both at Vmem = 1.5V. I haven't touched any other voltage. Bumping the voltage up to 1.54V doesn't allow me to get stable 1N command rate or CL9, and I'm a bit afraid to bump it even higher to test. Any suggestions to getting higher speeds or tighter timings? Also, which of these OCs is better?



*please, no arguments about whether 16 GB is or is not too much ram, we all have our reasons. Thanks.
post #2 of 7
Try bumping your VTT voltage a bit and see if stability improves, which I doubt will though. If not, either it's the RAMs limit or bump the memory voltage a bit more. I'm not sure if that will now require heat spreaders on the chips as I saw some pushing up to 1.65v on these.

The 1866-cl9-1T IMO is better. Going 1866 to 2000 isn't a big leap, considering how much looser timings you have to make.
post #3 of 7
As stated the 1866 oc will probably be the better/more sensible option.

I have had luck getting better stability with the higher oc's with 4x4gb by loosening sub timings.

Might want to give it a try.

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post #4 of 7
Thread Starter 
Thanks for the replies. Xino, what was your best stable OC you got with 4x4?
post #5 of 7
I'll have to answer that later. I'm on job site right now.

I think I have the subtimings documented somewhere.

I do remember I had a build with 4x4 at 2133 9-10-10-28 1t.

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post #6 of 7
I think I had to increase tRC to 160+

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post #7 of 7
The best I could do is listed in my specs @ 1.5 V. I never messed with VTT. I'm happy with the OC I got out of them.
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