Max safe D9GMH 24/7 volts?

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Originally Posted by laragirl83

Okay, again, one more last time! :)

There was an article here, on XS, like 1.5 year ago...

I STRONGLY SUGGEST all of you to read it, and it will become all clear! Pls.

Micron D9 and Electromigration

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This is recommended because? That's common knowledge if you've done some high school physics with two minutes of wikipedia reading and its the same with low temperatures/high voltages for CPUs but no one seems to mention it in that respect. Especially with oc'd 45nm CPUs.

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And for those, who doesn't have the time or the language skill, here is the point:
From what i've concluded so far, for Micron D9 chips 2.4V is the maximum allowable voltage for 24/7 use, considering decent cooling is provided.

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This doesn't apply universally. That's just his opinion based on his experience. Every IC is different and we have thousands who've dead RAM at just 2.2V well cooled. Personally I would not go over 2.2V 24/7 at all. D9's run hot enough at stock and heat is not it's killer in my case either, even when it's actually at 2.15V DMM measured.

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Originally Posted by M.Beier

Crucial Ballistix PC6400 D9DQT 2*1GB and it was on a lot of different boards...

P5B-E+ for longest time, however P5W Deluxe (975, dont remember exact name)

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You ran your memory in a P5W DH Deluxe @2.8v???

So you volt modded that board to run your sticks at 2.8v?!?How fast were you running them?(The board only went up to 2.55v in the BIOS)
Regardless, the P5W had a horrible time w/ it's memory controller as far as scaling was considered. How fast were you running these sticks@2.8v??

2v on a 45nm CPU?!?!:shocked:

Maybe if your trying to a sucicide run @ 6GHz:up:

1.85v daily......:rofl:

Have you seen the results people are getting at 1.6v?

Check the extreme OCing section:)

i think he been smokin n usin ddr1 @ the time lol
i got way too many dead sticks @ 2.26v with active cooling the sticks never even got warm the most i ever used was 2.34v for a few bench sessions

Well just the other night I had my OCZ over 2.7 for a few hours, theyre as merry as ever, I ran them for a year over 2.4v.

Sure you can probably kill them doing so, but with the price, what's Xtreme about not taking the risk.

It's not like you guarentee to blow them up, i'd say the chances of them getting electromigration under 2.45v are pretty slim, you would have to be unlucky, and live somewhere in the tropics with useless case cooling.

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Originally Posted by KTE

This is recommended because? That's common knowledge if you've done some high school physics with two minutes of wikipedia reading and its the same with low temperatures/high voltages for CPUs but no one seems to mention it in that respect. Especially with oc'd 45nm CPUs.

This doesn't apply universally. That's just his opinion based on his experience. Every IC is different and we have thousands who've dead RAM at just 2.2V well cooled. Personally I would not go over 2.2V 24/7 at all. D9's run hot enough at stock and heat is not it's killer in my case either, even when it's actually at 2.15V DMM measured.

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Look man...
I had a lot of D9 based RAM so far... used 'em around 1GHz or more, and they were all required at least 2.25V or 2.3V... (excpet this current one, I love it :)) for 24/7 of course, guess what, they r still sound and safe:)
Imho, the guy who wrote that article, knows whats his talking and I trust him, because I am nowhere nere to his knowledge.
Thats it.

Anyway, with decent cooling 2.4V can be still good, we all know D9 based chips response pretty well to voltage increase...

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Originally Posted by White B

You ran your memory in a P5W DH Deluxe @2.8v???

So you volt modded that board to run your sticks at 2.8v?!?How fast were you running them?(The board only went up to 2.55v in the BIOS)
Regardless, the P5W had a horrible time w/ it's memory controller as far as scaling was considered. How fast were you running these sticks@2.8v??

2v on a 45nm CPU?!?!:shocked:

Maybe if your trying to a sucicide run @ 6GHz:up:

1.85v daily......:rofl:

Have you seen the results people are getting at 1.6v?

Check the extreme OCing section:)

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Coolaler used more then 2v on QX9650, just check HWbot.org ;)
1.85v I've seen with SS, even 1/4HP, on OCX.

My sticks, they ran 535 4-3-2-4 or 40x 3-2-2-4 both with very tight subtimings... :yepp:
And yeap, it was voltmoded indeed.

I run mine (G.Skill 6400 HZ) at 2.35v but will prolly up it to 2.4v cuz they love it. They're only rated at 2.1v, but that's just because the manufacturer is a wet blanket... :)

As far as I'm concerned if they can't handle 2.4v they deserve to die anyway!

What's the best program to check vMem?

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Originally Posted by M.Beier

Coolaler used more then 2v on QX9650, just check HWbot.org ;)

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now THATS something we can trust

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Originally Posted by M.Beier

1.85v I've seen with SS, even 1/4HP, on OCX.

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24/7? running for how long now?

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Originally Posted by M.Beier

My sticks, they ran 535 4-3-2-4 or 40x 3-2-2-4 both with very tight subtimings... :yepp:
And yeap, it was voltmoded indeed.

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and why dont you use this mem anymore? 1000+ 432-4 is pretty damn fast...

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Originally Posted by brenanh

What's the best program to check vMem?

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there isnt a good software tool to check vdimm since they all rely on the onboard monitoring chip which tends to be rather unreliable. use a DMM, even a cheap one for 15$ will do...

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Originally Posted by laragirl83

Look man...
I had a lot of D9 based RAM so far... used 'em around 1GHz or more, and they were all required at least 2.25V or 2.3V... (excpet this current one, I love it :)) for 24/7 of course, guess what, they r still sound and safe:)

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Mine aren't, using 2.25-2.12V DMM measured, rated 2.2V, lasted 7 weeks. :)

Let me outline something;

When anyone gives advice to people, not just one person who asked, everyone reads it and most people unaware follow it, it's the net; the responsible thing, unless you're willing to cover the cost of someones product loss if s/he follows your advice, is to just tell them to run stock or sub-stock volts which their RAM MFG will warranty or they just end up doing what you say and for too many that will give them dead RAM for multiple reasons. We know many motherboards overvolt RAM, this may be one reason, user ignorance is another but anything more than stock rated volts and you need to make it fully clear that it can and has killed RAM and you can't guarantee it won't, not because it's not cooled just because your or someone who you knew has RAM that never died at X volts when cooled, but because this is a community and community feedback speaks for itself and this time, we do know that 2.2V rated D9 RAM at 2.2V and above has resulted in corruption regardless of cooling/user experience. My last Crucial D9 pair died at 2.31V (DMM) one-off with 2C ambient and 152CFM Delta fan on it, you see. :(
The new pair I have, has done 3.0V 5-6 times without damage fine (no, no stability testing at plus 2.4V, that's exactly what kills them) but I'm not about to go around and say, "2.7V is perfectly fine, gives no damage if cooled properly" just because mine turned out that way. Every IC is different, just look at CPU/RAM overclocks and you'll see.

Thus, all you can say is: "I run mine or I ran mine 24/7 2.xV and nothing happened" rather than making a universal statement "all D9 can run 2.4V perfectly without corruption if well cooled" because while the first is a user feedback opinion and factual, the latter is a vacuous conjecture which is based on no real evidence and has already been proven false by equally reliable users. :)

As for anyone who wants to throw volts at them, that's their choice, no obligation and they're to blame if they kill them by expecting whatever volts above stock to work.

I agree with KTE ;)

And if you beleive everything you read, then your bound to come unstuck. The internet is full of garbage, and if some one doesn't get the answer they want from here, it will be posted in a thousand other places.

Sure anyone who starts overvolting and overclocking knows JDEC is 400-5-5-5 and 1.8v, and will know anything beyond this is potentially damaging. Why can't people just take resposibility for they're own mistakes, why do we need "to cover the cost of someones product loss if s/he follows your advice".

This is the internet, if you beleive everything you read, your a total idiot. Read, learn and sift through the information like a fine comb, and you will get it right 9/10.

And KTE if your sticks are dying below the manufacturers recommended voltage, you can RMA them anyway, and I think its time to get a new mobo, its obviously not the RAM.

I killed a set of D9's on my RD600 @ 2.3v w/ active cooling 24/7.

Current running 2GBHZ @ 2.2v on a P965-s w/ active cooling 24/7 (6 months no probs).

I recommend running 2.2v 24/7 for D9's

Only one pair of Crucial D9 died on this MB The0men, it's a new MB and the loadline voltage regulation is very good, slightly undervolts though and the rest of the RAM (3 pairs) run fine including 2 ProMOS and 1 Crucial. It was just the old one and it was used on two MBs rather than one. Simply a bad IC, died v.near stock and it was unexpected.

O sorry, I was under the impression you have had multiple set die.

Hmm bad luck really. I have no worries running lots of volts.

I personally think its more to the idividual stick of RAM, some are fine running high voltage all the time, some die below the rated like yours. Sounds more like an imperfect chip rather than the actual voltage used.

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Originally Posted by saaya

and why dont you use this mem anymore? 1000+ 432-4 is pretty damn fast...

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Saaya, I have perhaps worlds fastest DDR3 kit ;)
Belive me, these babies will break more barriers.

Both my sets of Ballistix have died from running a mere 2.0V 1000mhz 5-5-5-15 24/7 with 2 80mm fans on top of them. One set was the PC8000's 512mb's and the other set was PC6400 512mb's. Crappy motherboards (Gigabyte P965 S3 rev 1) and a Biostar TP35D2-A7. I did do a few bench sessions with the PC8000's running up to 2.81V but never with my PC6400's. Both sets are pretty much dead (3 sticks will run 667mhz 2.1V 5-5-5-15 but any more voltage or any faster = memory errors or no post.)

From what I've seen, the cheap motherboards have been the killers for people running 24/7 with cool temps and lower voltage. The sticks with 8 layer PCB's tend to handle voltage a lot better.

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Originally Posted by KTE

Only one pair of Crucial D9 died on this MB The0men, it's a new MB and the loadline voltage regulation is very good, slightly undervolts though and the rest of the RAM (3 pairs) run fine including 2 ProMOS and 1 Crucial. It was just the old one and it was used on two MBs rather than one. Simply a bad IC, died v.near stock and it was unexpected.

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hmmmm one stick died right? or both?
did it still boot and was unstable or didnt it even boot?
did it die/get damaged while running or maybe was damaged while you replaced it or moved it from one pc to the other? could have been static if it died that way...

And if its only one stick, or even two, but has been used on multiple mobos, and died after a year, it definatly wasn't a bad IC, If your running them at stock or lower voltage, they either work or they don't. I don't encourage people to go and flog the crap out of their RAM, but I also don't see the point in trying to scare people off being able to use the reccomended voltage all the way up to 2.5v if it say's to do so. If it blows up, you get warrenty anyway, and I have never had D9 die on me under 2.6 volts, even sets benched over 2.6v.

Conclusion: some people have bad experience with D9, some have good. But on the same token, any other chips can die under the exact same circumstances, and alot of it boils down to the motherboard you use it in, and luck of the draw, I wouldn't say D9 is any more prone to dying than anything else, just we hear more about D9 dying, purely because of the mass quantities people on XS use in comparison to other chips. Not to mention how much more abuse D9 cops, and can honestly take.

My G.Skill 8500 HK's D9GMH are warrantied for 2.3v - 2.4v. When I first got them I ran 4 sticks with no fan at 2.3v , the 1st kit died in a month, the second kit a month later. When I powered down the PC they were almost to hot to touch. So I have only 2 sticks per PC now, 1 cooled by a OCZ cooler, the other by 2x80mm fans while my OCZ are under RMA. I have them 2.36v 4-4-4-12 they seem ok. But I figure the manuf say 2.3 to 2.4v it's ok.

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Originally Posted by necron66

My G.Skill 8500 HK's D9GMH are warrantied for 2.3v - 2.4v. When I first got them I ran 4 sticks with no fan at 2.3v , the 1st kit died in a month, the second kit a month later. When I powered down the PC they were almost to hot to touch. So I have only 2 sticks per PC now, 1 cooled by a OCZ cooler, the other by 2x80mm fans while my OCZ are under RMA. I have them 2.36v 4-4-4-12 they seem ok. But I figure the manuf say 2.3 to 2.4v it's ok.

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you think manufacturers are right sayin they good for 2.3v-2.4v 24/7 they wrong they will die sooner or later
mine never got warm n died @ 2.26v n they rated 2.35v

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Originally Posted by KTE

This doesn't apply universally. That's just his opinion based on his experience. Every IC is different and we have thousands who've dead RAM at just 2.2V well cooled. Personally I would not go over 2.2V 24/7 at all. D9's run hot enough at stock and heat is not it's killer in my case either, even when it's actually at 2.15V DMM measured.

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How you are sure the motherboards do not contain poor unreliable circuitry for the DIMM slots?

Even DFI NF4 was notorious for this with all types of IC with extensive testing done by EMC2 (think that was his member name) that has disappeared for now.

As process gets smaller and more refined they are more sensitive to s**t circuitry. That or being a complete DUD set is cause for failure 2.1v, 2.2v.

Well, just an update, my FlexXLC has died running only at the volts specified in the EPP profile(slightly undervolt on the board). @:

Kind of disappointing that their own specs caused them to die.

They always stayed cool to the touch, but died anyways.

One stick is 100% dead, other can't even run stock EPP.

Hopefully Tony sees this and helps me out. Never had to RMA any of my many OCZ sets yet.

Maybe D9's just have poor reliability at any voltage?

Did you measure your Vdimm with a multimeter? My Asus X38/DDR2 board overvolts by 0.1V (!)

imho, it's not about D9's being sensitive or not; it's about common logic: the default voltage for all DDR2 is 1.8V. The manufacturers might want to impress customers and overclock their RAM for the consumer.
Meaning that they take perfectly healthy DDR2 ICs, feed them with 33% more voltage than what they're designed to be fed with (which is ***a lot*** anyway you see it), find their safe limits, test them for possibly "days" if not just hours, and eventually sell them as PC-7xxx, 8xxx and 9xxx.

Also, a warranty is not a guarantee that something will run problem-free for the agreed period of time; it's just an insurance that the manufacturer will fix/replace it for you. It might as well fail every 3 months.

And to stay on topic, up-to-2.1V w/o active cooling, or 2.3 with active cooling, for 24*7 use.

I would love to run my 6400 GBHZs (2x1gig) with more voltage than 2.1V.
But my Gigabyte GA-965P-DS3P always reboots after I set +0,4 (2.2V) in BIOS. After I go back in BIOS..PC Health Monitor show 1.8V DDR Voltage "FAIL".
I don't know what to do!

I ran my Gskill PC8000 HZ at 2.1v for a few months. No problemo. Now I use less voltage because I found the damn Ctrl-F trick on my old DS3;)

2.4v is what I personally think is max, but depending on your needs/wallet I guess 2.2v is a good combination of safe voltage and good performance.