Got a quick question for you.
I know the model number that you have, but can you look at any of the modules and tell me what the 5th thru 8th digits are of the Serial Number? They might be "2500", or they may be something else.
If they are "2500", then I'm thinking that your ram is using the Samsung HYK0 (same chips as in the generic Samsung Low Volt / Low Profile ram. While GSkill has been able to bin some of these for DDR3-2400 C9 and DDR3-2600 C10, most of them are going to top out around the same range and respond to voltage about the same as the generic Samsung. That might be why pumping 1.7v like you mentioned in your post #2 isn't helping much.
Also, do you have links to any of those reviews that you mentioned in one of the earlier posts? I'd like to see if there is a picture of the module label in the review to see if I can identify the chips in the review sample.
Edit: When I first read your thread I was thinking that with those timings and voltage of 1.65v that perhaps your kit was using Samsung HCH9, but I really don't think so anymore. If they 5th-8th is "1500" and the modules are double-sided, then yes, HCH9. If "1500", but single-sided, then they are likely using the same Samsung chips which go into making the 8GB modules. If double-sided and "2500", then they are probably the Samsung HYK0.
Nothing wrong with those HYK0, but if binned for 2133, then it is safe to assume they didn't make the cut for use in the 2400 or 2600 kits and you aren't going to do much more than what you are currently getting.
Edited by Reefa_Madness - 12/20/12 at 5:02pm