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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 101

post #1001 of 2062
Quote:
Originally Posted by pioneerisloud View Post

Did you even look at the table you posted? The 2GB sticks are 40nm, hence they are NOT the same thing. Probably why they don't overclock too well.

Wow, that's a new trick! It really sucks that you got the 40nm sticks..

Anyway, just for reference i'm in the middle of testing my 16GB out.. (4x4GB) on my Z77 chipset.
The max i can push them to do is 9-9-9-24 @ 2000MHz and 1T with 1.54v. I can't get them to be stable at 2133MHz no matter what i do..
I even tried stock timings + 1.57v and 1.07v on the IMC/VTT (well around that) and nope, no boot. Same with 2200MHz mad.gif

I guess i'm happy overall.. Going to see if i can lower the timings anymore with 1.55v maybe.. Otherwise i'm still happy at the end of the day!

P.S 2T to 1T makes ALOT of difference in just loading up windows.. It feels like it loads a tad faster! thumb.gif
 
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post #1002 of 2062
Quote:
Originally Posted by Matt-Matt View Post

Wow, that's a new trick! It really sucks that you got the 40nm sticks..
Anyway, just for reference i'm in the middle of testing my 16GB out.. (4x4GB) on my Z77 chipset.
The max i can push them to do is 9-9-9-24 @ 2000MHz and 1T with 1.54v. I can't get them to be stable at 2133MHz no matter what i do..
I even tried stock timings + 1.57v and 1.07v on the IMC/VTT (well around that) and nope, no boot. Same with 2200MHz mad.gif
I guess i'm happy overall.. Going to see if i can lower the timings anymore with 1.55v maybe.. Otherwise i'm still happy at the end of the day!
P.S 2T to 1T makes ALOT of difference in just loading up windows.. It feels like it loads a tad faster! thumb.gif

Is it possible that you can't overclock that well because you have four sticks in instead of dual sticks?

Also, I have a question to those with high overclocks. Is it worth it to push the voltage on these to 1.65 V to achieve higher clocks/tighter timings? I have the 30nm variation.
Edited by Admiral Mudkipz - 7/11/12 at 5:03am
post #1003 of 2062
Quote:
Originally Posted by Admiral Mudkipz View Post

Is it possible that you can't overclock that well because you have four sticks in instead of dual sticks?
Also, I have a question to those with high overclocks. Is it worth it to push the voltage on these to 1.65 V to achieve higher clocks/tighter timings? I have the 30nm variation.

Yes, 4 sticks makes it harder on the IMC which is why I've increased the voltage on that to 1.045 from 0.95. I'm also pretty sure that it makes it harder to get nice timings, along with it taking longer to test and more voltage required.

Funny thing is too that at stock the sticks want 1.5v on my board.. And they are stable if i manually set it to 1.35v.

Just funny that no matter what i do 2133MHz or higher isn't stable.. Might just be my CPU though or maybe the board.
Quote:
Originally Posted by Admiral Mudkipz View Post

Is it possible that you can't overclock that well because you have four sticks in instead of dual sticks?
Also, I have a question to those with high overclocks. Is it worth it to push the voltage on these to 1.65 V to achieve higher clocks/tighter timings? I have the 30nm variation.

I wouldn't go past 1.55v for 24.7.. I was a bit concerned with 1.54v
DDR3 stops scaling at around 1.5v anyway, ideally i'd like 1.5v but to get 2000MHz i need 1.54v which isn't too bad.

1.6 is a bit far imo, unless you have a fan cooling them just to be sure. There's no heat problems, but at the same time they probably aren't made to handle such heat. (Being ECO ram). You can try 1.65v but i doubt you'll see much improvement over 1.55v or so. As i said i ended up doing 2133 11-11-11-28 at 1.6v to see if it'd be stable and it wasn't, same with 2200.

Ideally I can see 2133 being the best someone will get with these sticks with 4x sticks, that with say 10-10-10-24 for timings. For dual i'd be suprised if the average board and average user could get 2400 with 10-10-10-24. Don't get me wrong they're great sticks.. especially for the money. It's just that the reviewers were using DICE to cool the ones that got 2800MHz etc, which is unfair as they don't mention it. Only in the comments someone posted that they broke one with DICE.
Edited by Matt-Matt - 7/11/12 at 7:13am
 
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post #1004 of 2062
Quote:
Originally Posted by Matt-Matt View Post

Yes, 4 sticks makes it harder on the IMC which is why I've increased the voltage on that to 1.045 from 0.95. I'm also pretty sure that it makes it harder to get nice timings, along with it taking longer to test and more voltage required.
Funny thing is too that at stock the sticks want 1.5v on my board.. And they are stable if i manually set it to 1.35v.
Just funny that no matter what i do 2133MHz or higher isn't stable.. Might just be my CPU though or maybe the board.

Curious, but why then would you run 4 sticks? I would think 8 GB's of RAM was more than enough for most tasks these days.
post #1005 of 2062
Somebody else mentioned that they might be a diff...but they do run at 1600 stock and 1.35 volts and say they are supposed to be 30nm

if they are not then I will have to return them based on false advertising mad.gif

oh and u run 4 sticks with x79 builds to take advantage of quad channel wink.gif
Edited by trulsrohk - 7/11/12 at 7:20am
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post #1006 of 2062
Quote:
Originally Posted by trulsrohk View Post

Somebody else mentioned that they might be a diff...but they do run at 1600 stock and 1.35 volts and say they are supposed to be 30nm
if they are not then I will have to return them based on false advertising mad.gif
oh and u run 4 sticks with x79 builds to take advantage of quad channel wink.gif

Quad channel isn't actually much of an improvement from what i heard, well actually someone told me it was just marketing.. and that an X79 system will run fine with 2x DDR3 sticks.
Quote:
Originally Posted by Admiral Mudkipz View Post

Curious, but why then would you run 4 sticks? I would think 8 GB's of RAM was more than enough for most tasks these days.

I had a friend send me the RAM, I decided to just get 16GB and be done with it. Seeing as I'd probably never get it again and had to wait three weeks. That and bragging rights is nice, I also had to borrow a friends 4GB kit of 1333MHz RAM.. which was terrible and made me lean more and more towards 16GB.

I also render videos sometimes, and i'm doing photoshop and stuff for school and i've always heard that they're memory hogs. Same with 3DSMAX which i use too. Vegas isn't too bad though. It also means i can just leave everything open! thumb.gif
 
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post #1007 of 2062
Thread Starter 
When running 4 or more modules, make sure to increase the tRFC. I noticed on the G.Skill 2600 ram using these ICs, the tRFC is like 209! I run tRFC of 148 when running 16Gb. Anyways, to give you an idea what timings G.Skill programs their Samsung 30nm chips to run at 2600, check out this link (courtesy of Da1Nonly):

http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3_6.html
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post #1008 of 2062
Quote:
Originally Posted by Matt-Matt View Post

I wouldn't go past 1.55v for 24.7.. I was a bit concerned with 1.54v

The official spec for these chips is 1.5v + 5% max, i.e. 1.575v; incidentally, that is also the max Vdram officially supported by Intel (IvyB). So I'm personally quite comfortable with that voltage (but I also bumped vccsa/vccio by 5% to match, which from what I understand is important).

That said, many retail forms of these chips (e.g. GSkill Trident X) run them at 1.65v, although granted that's with heatspreaders. But someone suggested earlier: ~1.60v without active cooling on the RAMs, ~1.65v with a fan pointed at them, should be safe.
post #1009 of 2062
Quote:
Originally Posted by ericeod View Post

When running 4 or more modules, make sure to increase the tRFC. I noticed on the G.Skill 2600 ram using these ICs, the tRFC is like 209! I run tRFC of 148 when running 16Gb. Anyways, to give you an idea what timings G.Skill programs their Samsung 30nm chips to run at 2600, check out this link (courtesy of Da1Nonly):
http://www.xbitlabs.com/articles/memory/display/ivy-bridge-ddr3_6.html

Quote:
Originally Posted by ti20n View Post

The official spec for these chips is 1.5v + 5% max, i.e. 1.575v; incidentally, that is also the max Vdram officially supported by Intel (IvyB). So I'm personally quite comfortable with that voltage (but I also bumped vccsa/vccio by 5% to match, which from what I understand is important).
That said, many retail forms of these chips (e.g. GSkill Trident X) run them at 1.65v, although granted that's with heatspreaders. But someone suggested earlier: ~1.60v without active cooling on the RAMs, ~1.65v with a fan pointed at them, should be safe.

Those are some really useful tips. I'll get to tweak my ram oc more when my z77-ud5h-wb board gets here.
Granted I'm still on a 2600k chip, so 2133 with good timings is my goal. biggrin.gif
post #1010 of 2062
Quote:
Originally Posted by trulsrohk View Post

Somebody else mentioned that they might be a diff...but they do run at 1600 stock and 1.35 volts and say they are supposed to be 30nm
if they are not then I will have to return them based on false advertising mad.gif

Different ICs = different OCing properties, even if the stock speed and voltage is the same.

They seem to be mislabeled where you purchased them.
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