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Samsung B-die safe voltage for daily use on Zen 3000 Cpu's

Silent Hill

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Just registered here at Techpowerup to ask a question about my dram voltage with my new 3900x, hoping someone can help me if possible.

So I used the ryzen dram calculator for my samsung b-die ram, everything seems stable in memtest86, but I'm a little weary of max safe voltage for b-die. My BIOS is set for 1.46v for dram, but hwinfo reports 1.472v for most of the time. Is this a safe value for daily usage for ram on my 3900x system? There is no temperature probe for my dimms so i cant see the temps they are running at, but there is a good bit of airflow going through my case and on the modules.

I have it running 3600mhz cl14 at 1.46v bios / 1.472 software with fluctuation down to 1.464v.

I have read that 1.5v is max safe voltage for daily, but what are your guys opinions on my situation, is this safe without risk of degrading at 1.46/1.472v? Just wanted some reassurance on this, and your guys opinions on the matter. Hope to hear back soon. Thank you.

Edit: forgot to add I'm on an x570 motherboard.

.
 
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1.5v and RMA them if they die while under warranty.
 
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1.5v and RMA them if they die while under warranty.
NO - Suggesting a too high voltage isn't good advice. The idea is to suggest voltage that won't potentially kill the sticks in the first place.

1.5v's is high, I've seen 1.35v's as the suggested daily voltage for B-die, 1.40 is acceptable as long as the sticks are cooled properly and not getting too warm.
 

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There is a thing called volt droop and creep.

There is a certain level of tolerance, you are fine if you want find the minimum volts it will run at stabily and press on.

My DDR3 ran at 1.5 for 2133, it runs at 1.65 at 2400.
 
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Just registered here at Techpowerup to ask a question about my dram voltage with my new 3900x, hoping someone can help me if possible.

So I used the ryzen dram calculator for my samsung b-die ram, everything seems stable in memtest86, but I'm a little weary of max safe voltage for b-die. My BIOS is set for 1.46v for dram, but hwinfo reports 1.472v for most of the time. Is this a safe value for daily usage for ram on my 3900x system? There is no temperature probe for my dimms so i cant see the temps they are running at, but there is a good bit of airflow going through my case and on the modules.

I have it running 3600mhz cl14 at 1.46v bios / 1.472 software with fluctuation down to 1.464v.

I have read that 1.5v is max safe voltage for daily, but what are your guys opinions on my situation, is this safe without risk of degrading at 1.46/1.472v? Just wanted some reassurance on this, and your guys opinions on the matter. Hope to hear back soon. Thank you.

Edit: forgot to add I'm on an x570 motherboard.

.
if its stable at that voltage just leave it the way it is. it will be fine.
 
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if its stable at that voltage just leave it the way it is. it will be fine.
Yeah, this is it pretty much. 1.5v-ish is fine for daily use, some kit's run at that with XMP.

I've ran b-die for benching @ 2.0V many times, they can take a lot. Of course that's not recommended. :p
 

JawnyS

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1.5 is most likely fine if you have decent air flow, ive been running samsung d-die on my intel system at 1.55 for 3 years and it still going strong, im at 1.41 on my ryzen system tho
 
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I think Buildzoid has said 1.45-1.5 for Bdie is fine for daily. I think cooling/case airflow is the biggest determining factor on what voltage you can safely run.


I run my Bdie at the fastest/lowest subtimings I can at 1.35 volts personally.
 
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This is Intel's "official" statement on the matter ... take it with the necessary CYA salt that 'officcial" statements imply:

"“1.5v is the absolute max we allow for XMP certifications. However, good DDR4 memory will run at 1.35v up to 3200. Technically, no “safe” (guaranteed) OC over-voltage but 1.35v or lower is best.”

  • 1.2V or lower = Best for DDR4
  • 1.35V = okay voltage for overclocking kits
  • 1.5V =absolute max voltage allowed for Intel XMP 2.0 profiles and max suggested voltage

I have seen Mushkin DDR3 at 1.94v w/ nary a worry, haven't bothered much with DDR4 overclocking.
 

Silent Hill

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Thanks to all of you for such quick replies, appreciate it. I think I'm going to stick with this voltage and overclock, at least for now. AMD said 3733 is the sweet spot supposably, but not sure its worth sacrificing timings for that bit of frequency and fclk increase over what i have now.
 
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Thanks to all of you for such quick replies, appreciate it. I think I'm going to stick with this voltage and overclock, at least for now. AMD said 3733 is the sweet spot supposably, but not sure its worth sacrificing timings for that bit of frequency and fclk increase over what i have now.
I haven't noticed a difference from 3600 and 3800 personally both 1:1:1... slight gain from 3200.
 
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I haven't noticed a difference from 3600 and 3800 personally both 1:1:1... slight gain from 3200.
Lisa Su did say at launch 3600 was the sweet spot.
 
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Lisa Su did say at launch 3600 was the sweet spot.

You also need a 2080 ti at 1080p to get those gains at least in gaming.
 
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Benchmark Scores I only game on this system... built for silence, not absolute max performance. ;)
1.5v on any kind of airflow is fine for B-die. I have had mine at 1.6v for months without any issues. Not this current set, though, as I am seeking stability over max performance.
 
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My DDR3 ran at 1.5 for 2133, it runs at 1.65 at 2400.
Ah yes I remember when everyone made a fuss about DDR3 1.65v being unsafe for ivy/haswell... Those things could take 1.8v no problem... Early DDR3 ICs could easily run 1.9-2v though.

B-die does have a lot of voltage tolerance for a DDR4 IC, they are generally seen to scale beyond safe IMC voltage, the difficulty is they seem to scale pretty well all through the voltage range. A lot of other ICs will start to roll over if you give them too much voltage, this is generally also where they will start to degrade.
 
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I stand corrected then and it's OK.
I'd rather error on the side of caution than on the side of recklessness.
I'll never intentially give bad advice, that much I can promise you.
 
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1.5v on any kind of airflow is fine for B-die. I have had mine at 1.6v for months without any issues. Not this current set, though, as I am seeking stability over max performance.
I vote on that...
Just have a good amount of airflow over the modules, not to keep them from dying... but to keep them stable.
B-dies get super unstable from a certain temp up too quickly. Its not something linear...

And the creeping voltage is common to a lot of boards. Mine does it too (X570 Aorus Pro) for the DRAM Voltage and the exact opposite (droop) for DRAM VTT.
 
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Yeah, this is it pretty much. 1.5v-ish is fine for daily use, some kit's run at that with XMP.

I've ran b-die for benching @ 2.0V many times, they can take a lot. Of course that's not recommended. :p
sorry for barging in on someone else's topic,but what do you think about running 1.7v on ddr3 on 5775c 24/7 ?
my sticks
 
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Benchmark Scores I only game on this system... built for silence, not absolute max performance. ;)
Nothing wrong with that. The DDR voltage limit is mostly bull.
 
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Nothing wrong with that. The DDR voltage limit is mostly bull.
Always wondered if it was supposed to be Voltage requirement for X speed opposed to Voltage limit to X speed.
Obviously you would over-volt IMC controller for stability if had the option to do so. It's not always about how much voltage you give just memory....
 
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Benchmark Scores I only game on this system... built for silence, not absolute max performance. ;)
If I were to think about it logically, the vDDR supplied has nothing to do with the IMC. The fact that you can, however, push the memory further would mean you need to put more strain and therefore more voltage through the IMC to get it stable. I think that's where the limit comes from... but then again, I've seen motherboards in recent years that push 1.35v through the IMC which is way beyond what is needed for stability. That's actually considered out of spec for Intel CPUs and in the realms of "this should be on LN2" territory.
 
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sorry for barging in on someone else's topic,but what do you think about running 1.7v on ddr3 on 5775c 24/7 ?
my sticks
I ran 1.8v benching my 5675c without any problems, I know Haswell is perfectly fine with 1.75v 24/7 but I don't really know much about broadwell 24/7... Given that xLake parts don't seem to complain about running over 1.8v I doubt broadwell is much different.

@TheMadDutchDude vDDR goes into the IMC as well
 

Silent Hill

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Did some more tweaking tonight, got 3600mhz 14-14-14-14-28-42-288-1T stable at 1.465v BIOS. Going to submit my Cinebench scores in the correct thread as well probably.
Seeing what you guys have said about the voltage, I feel a bit more at ease using this value for my RAM. Thanks to everyone again for the reassurance.
 
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@TheMadDutchDude vDDR goes into the IMC as well
Today’s CPUs are different though. It does affect the IMC but wouldn’t kill it like a decade ago. I killed a Phenom from DDR overvoltage. Can’t remember exact numbers... but it was DDR2 I think.
And I think Intel’s CPUs at some point had the same issue, correct me if I’m wrong...
 
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