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Samsung Miracle Memory Club - Page 21

post #201 of 1055
Quote:
Originally Posted by ivanlabrie View Post

Don't be afraid to do so...Samsung only undervolts them cause they can run those clocks with such low voltage. That's all really. thumb.gif
This same ic's come in 1.65v rated ram running much higher clocks.

EDIT: In fact the ram has two profiles you can see in cpu-z and your bios. One of them has 1.5v as rated vdimm for boards that don't support less than that. They can run those volts no prob...

For the record, at least, I thought I would post this paragraph from Dave's review of the sticks at TPU. Not saying myself that you absolutely should not run higher voltages such as 1.65v but may not be quite a good idea as you claim. And do you have an example of 1.65v RAM with these ICs? Not challenging you; just want to know.
Quote:
The 30 nm memory ICs are manufactured by Samsung, commonly referred to as "D-die" and have two voltage modes, 1.35 V, and 1.5 V. The two different voltage modes and supporting DIMMs do use the same memory IC, so attempting to use the higher voltage setting on 1.35 V sticks maybe provides some success when overclocking, but seemingly the low-profile PCB prefers 1.35 V, and the "regular" PCB prefers 1.5 V. Both types can be purchased currently at very low prices.

The 1.35 V and 1.5 V settings each have pre-specified limits, with 1.35 V supporting 1.28 V - 1.475 V, while the 1.5 V mode supports 1.45 V - 1.575 V. I have found that the 1.35 V mode does operate at lower voltages as well, but going lower than 1.25 V can cause artifacting on the desktop with certain VGAs, even though stability testing passes with flying colors.

That said, I was able to run the default 11-11-11-28-1T timings @ 1600 MHz with just 1.2 V, which is considerably lower than the stock 1.35 V.

I also found that adjusting voltage outside of the pre-programmed voltage mode results in frequency scaling dropping off quite quickly as explained above, so I recommend that users do not exceed the pre-determined voltage ranges in order to prolong the DIMM's life. That means that 1.35V sticks should see no more than 1.475 V, and 1.5 V sticks should see no more than 1.575 V. Both types of DIMMs do seem to scale a little bit once those values have been exceeded, but because the gains are quite minimal, it is not recommended at this time.

Edited by wrigleyvillain - 1/18/13 at 11:12am
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post #202 of 1055
Quote:
Originally Posted by Cyrious View Post

I must get a kit of this stuff for my EVGA 790i board... Problem is, i dont wanna spend money on something that ultimately might not work with my hardware. But if it does work, it will effectively remove memory stability as one of the things i need to keep an eye on when overclocking my processor.
Does anyone here know of anyone who has run a kit of these on such an old DDR3 board?

CYRIOUS JUST UPGRADE ALREADY
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post #203 of 1055
Seconded. smile.gif
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post #204 of 1055
Quote:
Originally Posted by wrigleyvillain View Post

For the record, at least, I thought I would post this paragraph from Dave's review of the sticks at TPU. Not saying myself that you absolutely should not run higher voltages such as 1.65v but may not be quite a good idea as you claim. And do you have an example of 1.65v RAM with these ICs? Not challenging you; just want to know.

Yes, there are a lot of new sticks with HYK0 ic's in them.
Check the G.skill Trident X 2400 cl9 and 2666 cl10 out for instance...I wouldn't trust that TPU review all that much really, cause the dimms are only rated for 1.35v cause they CAN run that low, mainly to comply with the new GREEN wave. For us enthusiasts it doesn't make a difference though. They are also rated for 1.5v for JEDEC specs (yes, the same lo profile sticks.)
The 1.5v rated dimms he mentions DON'T use the same ic, they use HCH9 which is an older 40nm ic, so I'd question his credibility really. If you don't wanna go over 1.5v, ok, no prob, but it will hinder your max oc.
Quote:
Originally Posted by dmanstasiu View Post

CYRIOUS JUST UPGRADE ALREADY

It's a nice board for benching 2d on cold...I'd get a newer z77 rig though for all around use. It can be pretty cheap if you know what and where to buy. thumb.gif
Edited by ivanlabrie - 1/18/13 at 12:37pm
post #205 of 1055
Got my self some of these wondersticks! Lets hope I learn to OC a little better than last time (ended up in 1 dead stick for no reason!)
They come without heatsinks, are they needed?
post #206 of 1055
Thread Starter 
Quote:
Originally Posted by ivanlabrie View Post

2400mhz isn't possible with a Sandy cpu.

Use 2t if it posts and tweak the other main timings...Try 1866mhz cl7-9-7-24-2t with 1.7v. I could do that using my CRAPPY G620 sb cpu which has the most basic IMC in the world lol

It is possible to get to 2400 mhz and above in SB, but the catch is it is extremely rare to find a SB CPU with a good enough IMC to do so.
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post #207 of 1055
Thread Starter 
Quote:
Originally Posted by MiiX View Post

Got my self some of these wondersticks! Lets hope I learn to OC a little better than last time (ended up in 1 dead stick for no reason!)
They come without heatsinks, are they needed?

Lol, last time I went on a suicide bench run, I destroyed a lot of silicon on my PC. It is a miracle it is still running.

They don't need heatsinks so long as you have decent case air flow.
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post #208 of 1055
Quote:
Originally Posted by Tjj226 Angel View Post

It is possible to get to 2400 mhz and above in SB, but the catch is it is extremely rare to find a SB CPU with a good enough IMC to do so.

That would be an exceptionally rare chip with either the 2400 mhz divider.. SB-E engineering sample chip, or one that could handle a very high FSB capability. Suffice to say unless you are exceptionally lucky to get a hold of one.. its basically not possible.
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post #209 of 1055
Quote:
Originally Posted by Tjj226 Angel View Post

It is possible to get to 2400 mhz and above in SB, but the catch is it is extremely rare to find a SB CPU with a good enough IMC to do so.

Quote:
Originally Posted by Avonosac View Post

That would be an exceptionally rare chip with either the 2400 mhz divider.. SB-E engineering sample chip, or one that could handle a very high FSB capability. Suffice to say unless you are exceptionally lucky to get a hold of one.. its basically not possible.

Yep...best I've seen is 2300mhz with ln2 and awesome IMC.
post #210 of 1055
I think I'll try to get around to benching my 1866 8-9-8-24 1T tonight for the club.. maybe. Don't feel like leaving my machine on long enough without using it to bench that though :|
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