Crucial Sport VLP OC advice needed

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Joined
2 Mar 2013
Posts
3
Hey,

I really appreciate the information you share with us in here 8 Pack!
Got some very useful information regarding memory overclocking from all those threads :)

My specs:
CPU: Intel Core i5-2500K
RAM: Crucial Ballistix Sport VLP (16GB DDR3-1600 @ CL9-9-9-24, 1.35v)
GPU: MSI R7950 TF 3 (7970 PCB)
Board: ASUS Sabertooth P67
PSU: Sea Sonic G-Series G-550

I've been overclocking my computers' parts since I've built the first rig myself and I am running my good old 2500k and my HD7950 overclocked and watercooled and have no problem tweaking those various voltages and board settings. I do know the basics of memory overclocking but I'm kinda stuck here:
I have the sticks running at 2133@11-12-12-30-1T single channel but can't manage to get 1T running with both sticks installed. Doesn't seem to matter if I change VCCIO, VDIMM or VCORE, 1T just doesn't want to run with both sticks installed, at least at 2133!
This is freaking me out, as I don't want to accept it's the IMC not able to run two sticks at 2133@1T...

Stick #1 @ 2133 single

I can run this one on 10-11-11-28 as well without too much volts, seems to be the better one.

Stick #2 @ 2133 single


I already made sure that my board is not setting strange timings when inserting the second stick using Memtweakit:


Short Linx runs to verify lower frequencies:
1600 (XMP):

1866 (manual)


I ran memtest from an usb stick using tests 2 and 5 each 10x to quickly check the stability and found 2133@11-12-12-30-1T to be stable on each of my mem sticks on its own (single channel) but as soon as I plug the second one in test 5 starts to throw errors at my face :D
Doesn't matter which slots I use, both VDIMM_A1/_B1 and VDIMM_A2/_B2 work equally good (or bad).
You can see my 24/7 VCCIO/VCCSA settings at the last screenshots.

Any hints on why I'm unable to get 2133@1T stable while using two sticks?
I was thinking getting 5.4 GHz prime stable was a hell of work, but this is just driving me mad lol :p


Thanks for reading and regards!
 
Thanks for your input :)

I did some testing today and recorded my results, will continue later.
VCCSA of 0.925v is stock on my board/cpu, I'm running 0.9375v most of the time.
A combination of VCCIO around 1.1v and VCCSA 0.9375v allows me to run memtest #5 for about 15 minutes before errors occur, if I increase VCCSA to 0.975v it errors out after 7-8 mins. I did increase VDIMM from 1.5v to 1.63125v, which gave me a slight boost in time until memtest craps out.

I will fiddle around a bit more tomorrow, don't have much spare time today (sadly).

Again, thanks for your insight mate ;)
 
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