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Samsung 2x4Gb Low Voltage DDR3 1600 kit (OCing to 2400+) Discussion - Page 97

post #961 of 2062
hmm, maybe it's just under prime blend?
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post #962 of 2062
Quote:
Originally Posted by Johnny Utah View Post

Have you guys running at 1.5v+ felt your ram modules? at 1.4 mine are quite warm to the touch. 1.5v+ must make these pretty toasty I imagine.

I've had mine at 1.55v for 6+ months with no issues at all. I probably could lower the voltage, but I got lazy.
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post #963 of 2062
The sweet spot seems to be 2133 @ 9-10-10-xx, somewhere between 1.50v and 1.60v. I wouldn't worry about temperature at 1.60v and under, as long as the case is reasonably ventilated.

That said I'd increase VCCSA/VCCIO by 5%, since I read that too large a delta between VCCSA/VCCIO and VMEM, can cause IMC damage. But might be an old wife's tale...

Note also that switching the sticks between slots 0/2 and 1/3, can help get the same timings stable at a lower voltage. It definitely did for me.
post #964 of 2062
Quote:
Originally Posted by anubis1127 View Post

I'll go check mine out, I've had them at 1.59v and have been folding on the rig for a few weeks.

[edit]

Mine are cool to touch.  They do get cool airflow from a 120mm fan on them though, not sure if that is making a difference. 

Mine are fine at 1.5v, If i touch them i can feel air flowing over them though. I have no idea where it's coming from however..
1.55v is just starting to get warm.

So 1.55v is fine for a 24/7? I don't want to ruin these as it was hard enough to obtain a set.. yet alone 2 tongue.gif
Quote:
Originally Posted by ti20n View Post

The sweet spot seems to be 2133 @ 9-10-10-xx, somewhere between 1.50v and 1.60v. I wouldn't worry about temperature at 1.60v and under, as long as the case is reasonably ventilated.
That said I'd increase VCCSA/VCCIO by 5%, since I read that too large a delta between VCCSA/VCCIO and VMEM, can cause IMC damage. But might be an old wife's tale...
Note also that switching the sticks between slots 0/2 and 1/3, can help get the same timings stable at a lower voltage. It definitely did for me.

Mine won't boot at 2133 no matter what the timings frown.gif

As for the VCCSA/VCCIO can you give me an example of some settings? I understand how the IMC works, but not how the VCCSA/VCCIO work or what they do exactly tongue.gif

As for the slots, yes I've had this happen before. I found that with my board i get better stability if the 1 and 3 are used, seeing as that's the general layout.

Also, I was reading the memory support list for my board.. The Eco isn't supported, and there are some sticks that are only supported in the first 2 slots? (1/3) I don't even understand how that works...
 
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post #965 of 2062
Quote:
Originally Posted by Matt-Matt View Post


Mine are fine at 1.5v, If i touch them i can feel air flowing over them though. I have no idea where it's coming from however..
1.55v is just starting to get warm.
So 1.55v is fine for a 24/7? I don't want to ruin these as it was hard enough to obtain a set.. yet alone 2 tongue.gif
 

 

Pioneerisloud stated he has been running his at that voltage for 6+ months.  I checked my UEFI and I've been using 1.57v with no issue for about three weeks.  I can't make any guarantees, but I'm pretty comfortable running them at 1.57, I guess we'll see I plan on folding on this RAM kit until the 2600k gets obsolete in TC.

post #966 of 2062
On Ivy Bridge, defaults are 0.925v VCCsa, 1.05v VCCio, 1.5v Vmem. To be safe while remaining within official spec for both Intel and the Samsung RAM, I'd make sure to increase them all by the same %, with max +5% (0.971v VCCsa, 1.102v VCCio, 1.575v Vmem). Of course, many people run these fine 24/7 at 1.60-1.65v, but YMMV.

(If you decide to instead undervolt Vmem below 1.5v, you should keep the other voltages on default / auto.)
Edited by ti20n - 6/30/12 at 9:54pm
post #967 of 2062
My final results: 2133 9-10-10-28-1T @ 1.55v. That's on slots 0/2; on 1/3, I need 0.05v more for the same timings... lucky thing these sticks fit under my CPU heatsink :-)
Edited by ti20n - 6/30/12 at 10:03pm
post #968 of 2062
They also run at 2133 9-10-10-13-1T @ 1.565v, but the lower tRAS seems to offer no substantial bandwidth / latency improvement.
post #969 of 2062
Quote:
Originally Posted by ti20n View Post

My final results: 2133 9-10-10-28-1T @ 1.55v. That's on slots 0/2; on 1/3, I need 0.05v more for the same timings... lucky thing these sticks fit under my CPU heatsink :-)

I found the same results with my Gigabyte board. Slots 0-2 got me 1866 cl9-10-9-28 so far with 1.4v
I didn't test more today, but on slots 1-3 I had to use 1.6v for 2133 cl10-10-10-28.
Quote:
Originally Posted by ti20n View Post

They also run at 2133 9-10-10-13-1T @ 1.565v, but the lower tRAS seems to offer no substantial bandwidth / latency improvement.

I'm gonna tweak my oc some more tonight and post back here.
post #970 of 2062
Have you guys tried 1.535v on 2133Mhz 9-10-10-XX-1T?

My current is now at 2133Mhz @ 1.45v
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