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Overclocking with 16gb of ram

post #1 of 4
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Hi all. I'm in the process of oc'ing my sig rig. See this thread for some of the settings...

http://www.overclock.net/intel-cpus/...9-vcore-2.html

Basically, I'm being told my 16gb of ram is the problem and that i need to adjust my vtt and dram.

I'm at a 45 multi at 1.39 and not stable...BSOD in P95 with 124 error.

So, my ram is set manually at 1.5 and stock 1600 settings. I have no idea how much more on dram I can go above 1.5 and also don't know how much more on vtt I can go since I usually left it on auto. I just crashed with a 124 error running IBT. My settings were 46 multi. vcore 1.395. LLC 4. internal pll overvoltage enabled. DRAM 1.5dram and stock stick settings. VTT at 1.064.

Do I keep upping my vtt? or should I try my dram? How much is too much for those? Also, should they be within .5 volts of each other as a goal...or is it okay for them to be within .4v or less of each other.

Help this noob please!!!!!!!!!!!!
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post #2 of 4
Quote:
Originally Posted by MAKATTACK View Post
Basically, I'm being told my 16gb of ram is the problem and that i need to adjust my vtt and dram.

I'm at a 45 multi at 1.39 and not stable...BSOD in P95 with 124 error.

So, my ram is set manually at 1.5 and stock 1600 settings. I have no idea how much more on dram I can go above 1.5 and also don't know how much more on vtt I can go since I usually left it on auto. I just crashed with a 124 error running IBT. My settings were 46 multi. vcore 1.395. LLC 4. internal pll overvoltage enabled. DRAM 1.5dram and stock stick settings. VTT at 1.064.
I must ask, did you buy a 16GB kit or 2x 8GB kits? If you bought 2x 8GB kits then you will likely not be able to get it stable at the advertised frequency/voltage/timings. Which would explain your instability.

Here is an example of some RAM that runs at CL6 for 2 dimms but jumps up to CL9 for 4 dimms (check the reviews):

http://www.newegg.com/Product/Produc...82E16820231444

Always by a single kit for the amount of RAM you want to have or else you risk running into stability problems using the profiles. Kits are tested and guaranteed to operate at the rated timings/volts for that kit only. Often two kits can be purchased and they will operate at the rated settings, but it's not guaranteed.

Quote:
Originally Posted by MAKATTACK View Post
Do I keep upping my vtt? or should I try my dram? How much is too much for those? Also, should they be within .5 volts of each other as a goal...or is it okay for them to be within .4v or less of each other.
Max safe voltage for VTT is reported to be about 1.15v. Max recommended voltage for dram is 1.58 (from Intel). The difference between the two should never be more than .5 volts maximum. If it's less it doesn't hurt.

If it was my RAM and I bought two dual-channel kits I would try looser timings than what it is rated for (I'm assuming this is what you did).


My RAM was a 16GB kit and I didn't have to change a thing (it was also the Intel recommended 1333MHz and 1.5v). I enabled XMP and changed my multiplier to 47 and it was stable with everything on auto (other than a really high vcore). Then I dropped it down to 45 and tweaked my vcore (offset +.035) and my PLL voltage (1.725).

My vcore now hits a max of 1.320 instead of 1.4xx like it did on auto @45.


post #3 of 4
i have a similar setup (2600k @ 45x/1.325vcore). i was getting DDR3 based BSODs (e.g., 0x109). i pushed DDR3 voltage from 1.5 stock to 1.525, 1.550 and now 1.575 (VCCIO 1.1) (most recent one was after i freshly formatted).

i'm willing to go to 1.6 if necessary, but given that the memory is rated at 1.5/1600, i'd rather tweak other settings first. my BSODs have been exceptionally random (the last three have not been under load), so it isn't clear how much more power i'll need.

have you tested with memtest86 + intel burn test (at maximum) and passed? i would do those things and see if you're getting memory errors. 0x124 BSOD could be inadequate vcore rather than memory voltage
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post #4 of 4
If the RAM is rated 1.5/1.6 then try all the way upto 1.6v. VTT (VCCIO) should really be left on auto unless your overclocking the RAM or if you're using 1.65v RAM.

Error 124 can correspond to vcore, vtt or PLL voltage.
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