safe micron DDR3 voltage

[saaya]

But you can't know what will happen after half year, 1 or 2 years. If some voltage seems safe for a few weeks or months it doesn't mean it will be safe for longer period because degree of degradation (or death coming) might be much slower. The longer you intend to keep your memory the less "safe" volts run it

yeah, but if we know at what voltage memory died after a few weeks or months or immediatly thats at least something
and it will allow us to guess pretty well what voltages are safe and what voltages arent.

thats why i made this thread, i did my own testing and received quite some feedback about what voltages killed memory which arent publicly accessible, so i figured id give you guys a headsup and share my knowledge so that everybody at least has a rough idea where the voltage "mindfield" begins

M/B: Maximus Extreme
Vdimm: 2.34V in BIOS -- 0.036V to 0.038V overvoltage (measured at leg of MOSFET: Bios 1.90V --> 1.938V, Bios 2.20V --> 2.236V)
LN2 benching: about 4-5 hours
Mem cooling: 2 x 8cm fan

thank you very much for sharing this information here fredyama

Thats quite a bit overvoltaging on vdimm... :\
Still sounds odd that you lost at that voltage..
But 2.43v is quite high vdimm for DDR3, I'll confess

it wasnt 2.43
2.34v in bios + 0.037 overvoltage = 2.377v, so roughly 2.38v

and, correct me if im wrong fredyama, but the sticks were not degrading, both sticks just suddenly stopped working completely.

from what ive seen and also heard as feedback, vdimm fluctuates the most during bootup and shutdown on most boards. i assume that something, be it the memory or whatnot, triggered a system reboot. this somehow resulted in a big fluctuation of vdimm or maybe only vtt or vrefdq (ref voltage like vtt), which then killed both sticks at the same time.

either that, or the memory died because of a voltage spike or some other issue, which then resulted in the reboot...
but a voltage spike has to be quite big to kill both sticks at the same time... damage them, ok... but so badly that none of the sticks boots anymore... at the same fraction of a second? but then again, this is how it happened with most people who lost ddr3, from one second to the next it just didnt boot anymore.

Regardless of slight variations we can still notice "trends" if people give such feedback.
For instance, the threads where above 2.3V DDR2 was mentioned as being unsafe for a normal desktop 24/7 with a year longevity in mind, actually did help us, even though many killed those Microns at 2.1V (me too) but most didn't and were safe till around 2.3V real when cooled although no more. I would then stick to advising that much maximum for it and not anymore even though I've rallied 3V normal air into them for over 3 hours once and above 2.3V regularly for benching, I would never advise it. The trend would be similar in DDR3 although different volts.

exactly... as long as you get feedback from people telling you something just blew up, you get at least a rough picture where the midfield starts.

yes, there are people who dont care about the money a respawn costs them and run around in the midfield without a care in the world, but for those people who dont want to risk anything its good to know where the mindfield begins.