frying my memory?

nortexoid

Diamond Member
May 1, 2000
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I just bought this 128MB stick of pc133 the other day..i run it for about a day and it stops working...hmmm - i return it, get another brand spanking new one, run it in my system, runs fine for a few hours, start getting errata again...

check my mobo manual - and apparently it (asus K7M) sets the IO voltage to 3.4 by default...my pc100 has worked fine for about a year in it at that voltage, even overclocked...

i set it to 3.3v and now my pc133 stick is fine...is it that pc133 in general is extremely sensitive voltages or is it that this particular brand of pc133 (azenram - supposedly micron OEM) is crap?
 

pm

Elite Member Mobile Devices
Jan 25, 2000
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You can tell if it's micron memory by looking at the chips themselves. The chip codes should read "MTxxxxxxxx-xx" where the "x"'s are numbers . If the first two letters are MT then it's Micron memory.

As far as 3.4V vs. 3.3V that's pretty flaky memory. Most memory should be solid up to well over 10% over spec. - which would mean at least 3.7V in this case. It will shave several years off of the life of the memory, but it should definitely work at 3.7V. It's a bad sign if it can't take 100mV more than spec.
 

esung

Golden Member
Oct 13, 1999
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It might just be that your stick is sorta on the borderline of spec.. I've run my SDRAM at 3.4v (K7M as well) with no problem. but now I put it in 3.3v(there's no need at 3.4v in my situation, after extensive testing)

 

nortexoid

Diamond Member
May 1, 2000
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yeah, that's what i figured...considering i have three different sticks of pc100 from 3 different manufacturers that haven't had one single problem running beyond spec @ 3.4v

i might take this sh1t back...hey, anyone know the chip codes for the majority of companies?

i.e. infineon, hyandai, nec, etc...
 

esung

Golden Member
Oct 13, 1999
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Your best information is from the respective chip manufacture's website.