$48.99 Samsung 30nm DDR3 1600 hitting 2133?!?

[SonDa5]

Originally Posted by cadaveca

woah, dude, over 1.2 V might be dangerous!!!

try 1.125 V perhaps? Too much can cause instability.

My other sticks work well with the voltage setting. Any less on my Gskills and I lose performance then stability.


STrange thing is that MSI has the VCCIO default to 1.31v on this particular MB and MSI says it is perfectly safe at this setting. To be safe I went as low as I could go.

[SonDa5]

Originally Posted by cadaveca

woah, dude, over 1.2 V might be dangerous!!!

try 1.125 V perhaps? Too much can cause instability.

I am not at my RIG right now so can't tweak right now. But I think my problem was the TRFC timing setting. I will adjust as you recommended when i have time and get back to you.

[cadaveca]

Originally Posted by SonDa5

My other sticks work well with the voltage setting. Any less on my Gskills and I lose performance then stability.


STrange thing is that MSI has the VCCIO default to 1.31v on this particular MB and MSI says it is perfectly safe at this setting. To be safe I went as low as I could go.

Every other board maker, and Intel themselves, say 1.2 V MAX. That's the first I've ever heard that higher is OK.

Originally Posted by SonDa5

I am not at my RIG right now so can't tweak right now. But I think my problem was the TRFC timing setting. I will adjust as you recommended when i have time and get back to you.

Yeah, do keep us informed of how things go. I mean, it's more than possible you got a bum set, but i did find that those two secondary timings were crucial to stability.

[Wrigleyvillain]

Yeah fwiw even my older MGH-E Hypers need a relatively super-loose tRFC to hit the high clocks on tight timings (8 and lower).

[El_Mayo]

Anyone able to ship some of this RAM to me (UK)?

[Wrigleyvillain]

Yeah me you lucky SOB Talk on Battlelog later.

[AsRock]

Originally Posted by cadaveca

No, the "D" refers to a dual-channel kit.

Single stick, no "D",

http://www.samsung.com/us/computer/m...ge/MV-3V4G3/US


Singlesided dual-channel kit, with a "D"(MV-3V2G3D/US):

http://www.samsung.com/us/computer/m...e/MV-3V2G3D/US




Sorry about that confusion. The IC itself supports two ovltage modes, but hte LP sticks are intended to run 1.35 V, and the regualr DIMMs 1.5 V, according to the information I received form Samsung.

I actually tested muc hhigher than 1.55 V, and on X79, it didn't get me much. A big part of why I rated them so high wasn't the maximum frequency(which for me was good), but also because they can hit 9-9-9-27 @ 1866 on stock votlage. The G.skill 16 GB kit I tested...not so much.

ALso, you have 4x 2GB G.Skill kit, so running 2GB sticks is much easier than 4GB sticks. I didn't really have much problems at all, except for TRFC, and tCWL, everything else uses pretty standard timings.

I would agree with you but each time i look at there site or get a email of asking what the D is i get different responses.

Like really do they know as the last time i emailed them they told me it was double sided.

[cadaveca]

Originally Posted by AsRock

I would agree with you but each time i look at there site or get a email of asking what the D is i get different responses.

Like really do they know as the last time i emailed them they told me it was double sided.

http://img.techpowerup.org/120315/SammemD.gif

Yeah, i know they can be confusing. Should ask them the server stuff and laptop stuff get's a "D" as well. Typical email support. I know I've got it right.

http://www.samsung.com/us/computer/m...e/MV-3T2G3D/US

The last two letters are the packaging type.

[SonDa5]

I've tried a number of different timings and voltages under 1.575v and I'm unable to get the ram to boot at 2133mhz with my 2500k at 5ghz.

My gskill ram scales super low voltage at same speeds at the Sammy's and the Gskill have higher stability when over clocking the ram and my system.

Unless i find a magic setting for the Sammy's they are going back to the store soon. I don't see the point of keeping them over my Gskill.

[Aquinus]

Originally Posted by SonDa5

I've tried a number of different timings and voltages under 1.575v and I'm unable to get the ram to boot at 2133mhz with my 2500k at 5ghz.

My gskill ram scales super low voltage at same speeds at the Sammy's and the Gskill have higher stability when over clocking the ram and my system.

Unless i find a magic setting for the Sammy's they are going back to the store soon. I don't see the point of keeping them over my Gskill.

What kind of timings do you have and what is your VTT voltage set to? You can't expect stock timings to work at 2133mhz, that is a little unrealistic imho.

[Wrigleyvillain]

Originally Posted by SonDa5

Unless i find a magic setting for the Sammy's they are going back to the store soon. I don't see the point of keeping them over my Gskill.

Or you could hook up one of our non-US homies.

[SonDa5]

Originally Posted by Wrigleyvillain

Or you could hook up one of our non-US homies.

I can see how the Sammys with the low profile and great low voltage/high frequency performance is desired.


I think I imght have a slightly low performing set of Sammys though. I wouldn't want to sell them to anyone because I fear the buyer might not be happy with them.

My experience is that not all cpus/gpus/ram perform the same. Manufacturers design them to run at a certain speed but over clocking isn't a guarantee.

[SonDa5]

Originally Posted by Aquinus

What kind of timings do you have and what is your VTT voltage set to? You can't expect stock timings to work at 2133mhz, that is a little unrealistic imho.

I have tried all the working settings that I have seen on other systems and I have made timing/voltage adjustments as recommended by CADAVECA.

I'm running a 2500k at 5GHZ for my testing. 2500k doesn't have as strong as IMC as the S2011 cpu in the TPU review that achieved a 2400mhz over clock on them.

My experience is that system voltage settings vary from one to another and tweaking is how you find the system sweet spots. I found some sweet spots for my system with Gskill ram and I have made ram timing adjustments for the Sammys and have had some decent low voltage/high performance results with my system. The Sammys that I have are not stable at high CPU speeds. My whole system is unstable at higher cpu speeds with the Sammy's.

The Sammy's are a great set of ram but my more expensive Gskill's offer more over clock ability and perform better in my system.

[Aquinus]

Plenty of 1155 rigs have been able to do 2133+. Once again, we're willing to help you out with your over-clock if you can tell us what kinds of timings and voltages you have. I'm not saying that the G.Skill isn't faster, all I'm saying is that with the proper tweaking the Samsung chips should be able to hit 2133.

[Wrigleyvillain]

Originally Posted by SonDa5

My experience is that not all cpus/gpus/ram perform the same. Manufacturers design them to run at a certain speed but over clocking isn't a guarantee.

Wellll...if you were to sell them here that's generally not so much of a concern.

[LagunaX]

Anyone going to microcenter there is a $15 off coupon so this $46.99 pair:http://www.microcenter.com/single_pr...uct_id=0380720
Would be $32 plus tax.
Coupon:
http://forums.anandtech.com/showthread.php?t=2233062

[Wrigleyvillain]

Glad I waited.

[tedy]

you people in usa are luckiest mofos in world.

[SonDa5]

Had some time to play so I broke out the Sammy again.

This time I found a sweet spot for 1870mhz 1T-9-9-9-27 1.56v with 2500k@5ghz.



http://valid.canardpc.com/show_oc.php?id=2299107


I'm thinking about keeping them again.

I might get add a 2x2GB set of Sammy's for a total of 12GB and use the 2x2GB kit for crazy OC benches.



Next test is 5GHZ with the ram at 2133mhz.

[SonDa5]

I'm stuck at 5GHZ. It wont boot at 2133mhz@5GHZ with the Sammys.

Anyone else taken the Sammys at 2133mhz@5GHZ with Sandy Bridge CPU?

[LifeOnMars]

Hey Dave how about a comprehensive ddr3 overclocking guide on different platforms for techpowerup. Im sure like myself alot of fellow tpuers were not aware of how key some timings are to stability

nice one sonda , looks like you are getting somewhere now

[cadaveca]

Originally Posted by LifeOnMars

Hey Dave how about a comprehensive ddr3 overclocking guide on different platforms for techpowerup. Im sure like myself alot of fellow tpuers were not aware of how key some timings are to stability

Possible in the future, for sure. I'd very much like to do so, actually, and thta was part of my plan wit hememroy reviews. I have a couple of other reviews to do first that may prove to be excellent reference material for that.

[LifeOnMars]

Glad to hear it matey I look forward to them.

[cadaveca]

Originally Posted by SonDa5

I'm stuck at 5GHZ. It wont boot at 2133mhz@5GHZ with the Sammys.

Anyone else taken the Sammys at 2133mhz@5GHZ with Sandy Bridge CPU?

That could very well be the issue. As teh CPU speed increases, so does bandwidth, so it's morethan possible you are right and the sticks won't support such a high bandwdith.

[LagunaX]