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corsair xms3 1600 2x2gb on 1333 mobo

post #1 of 9
Thread Starter 
Hey overclock.
Don't think me an idiot because of this, but I got this mobo (MSI 870a-g54) as a gift from my brother and it comes default DRAM 1333mz, but can get to 1600mz with an overclock.

Now my ram is corsair xms3 9-9-9-24 1.65v 1600 2x2gb. in the bios, it is at 1333 but can get to 1600 with an overclock, according to newegg and the manual.

So right now it is at 1333 9-9-9-24 "auto" voltage. My computer works fine as is, though I haven't ran memtest for that long, I want the printed performance so I up the frequency to 1600 and change the voltage to closest to 1.65, since I can't get on 1.65 on my mobo, I go about 1.66v. My problem is that with this it isn't stable, and I can't tell if it isn't stable because it is getting too much voltage or something else. I see no reason why it shouldn't be stable, but maybe someone can help me.

Cheers.

EDIT: I just want to tell you I did not overclock my FSB at all, and obviously then I am using a 1:4 FSB/DRAM ratio for 1600mz. Unstable meaning it goes slower and unresponsive at times. No BSODs yet, I am currently doing some prime95 blend tests, though.
Edited by Kegdas - 7/7/11 at 3:37pm
post #2 of 9
the more i look at it now the more of these threads and more of the same problem i see
i am sorry but i can't help you
it seems to be compatibility issue or something
but i have seen loads of corsair memory that's supposed to work at 1600 by factory settings but doesn't come even near it
also nobody got this issue solved, only thing that solved it was getting new memory...
edit:
so either learn to live with lower frequency, or get new memory and get rid of this one
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post #3 of 9
It is not a compatibility issue or something. He just needs to change his memory speed in the bios.

EDIT
All AMD mobo had 1333 as default in the bios.
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post #4 of 9
Thread Starter 
Quote:
Originally Posted by dixson01974 View Post
It is not a compatibility issue or something. He just needs to change his memory speed in the bios.

EDIT
All AMD mobo had 1333 as default in the bios.
So me having a 1333 mobo that can OC to 1600 basically means nothing? Well thank god about that.

The question remains, still, why do you think I am having stability issues? and to note, it is slower, sometimes unresponsive, for example like programs will take longer to start up and they crash, and I just had a BSOD.
post #5 of 9
Raise the CPU-NB voltage
Make sure timings are set manually and correctly
Use "2T" command rate
post #6 of 9
Quote:
Originally Posted by dixson01974 View Post
It is not a compatibility issue or something. He just needs to change his memory speed in the bios.

EDIT
All AMD mobo had 1333 as default in the bios.
be it default or not, i don't know about kegdas's issue, but i know a friend who can't make it work at 1600mhz i've been at his place and tried and failed miserably
at 1600mhz few seconds of occt testing gives bsod while everything else is at stock
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post #7 of 9
Thread Starter 
okay, so I got it pretty stable at:

CPU-NB: 2600
CPU-NB V: 1.29
RAM: 1600 9-9-9-24
DRAM V: 1.662
This is also a problem. I can either do 1.63 or 1.662 voltage, but not 1.65. Which would be better? I'm guessing the 1.662.

I Prime95 blend tested for an hour without problems, then played a video game a little, then I bsod'd.

So my question is do you think it is being undervolted or overvolted? What could I do to fix it? I could either raise the CPU-NB or change the CPU-NB voltage. I am asking this because I am NOT on my computer right now, but when I get home I want to quickly apply the settings and see if it is stable. Thanks.
Edited by Kegdas - 7/8/11 at 7:53am
post #8 of 9
You can try either. The small difference in voltage is unlikely to make a difference in stability or RAM longetivity due to higher voltage.

What was your BSOD? Perhaps it is not memory related. Have you used SuperPi at 32M setting to test the memory?
post #9 of 9
Thread Starter 
Hey guys, I know it has been awhile, but I'm back at it again, and I just want to get clarification here.

In order to run my RAM stable at 1600 (from 1333) on my AMD mobo, I must overclock it. I raise the FSB/DRAM ratio to 1:4 from 1:3.333. It runs unstable, and that is because there is not enough voltage going to the CPU-NB. So I raise the voltage on the CPU-NB from auto (1.212v) up from that. Because I do that, I must raise the CPU-NB Mhz, correct? Going back to the CPU-NB voltage, most sites say 1.25-1.35, but with my CPU-NB at 2600, I THINK its better at lower the CPU-NB voltage, like around 1.23. Is this likely at all?

Also, to clarify, I am not overclocking anything else at all. I see there are two voltages, CPU-NB and NB, and I know I can raise the clock of the CPU-NB, but I don't know where the *just* NB multipliers are. If there are any. Or is raising the *just* NB v for the FSB?
Edited by Kegdas - 7/14/11 at 4:40pm
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