Dangerous running vdimm@2.8v?
 

Hi!

Read the topic :)
Anyways im new to the whole ddr thingie and i dont know what the
"standards" are. Im running crucial pc2100 unbuffered un registered 256mb modules by the way.

sorry to say im back to aircooling as i have to get funding for new fans and such before im back to the lovely world of h2o-cooling :)

stock is 2.5v, most boards offer up to 2.7v or there abouts. I doubt 2.8v would be too risky because of this. many memory manufacturers state their modules are fine between 2.3v and 2.7v anyway.

thanx! i will stay off the higher voltages then. my epox card offers up to 3.3v..... :)

People say that even 3.0v is safe (I dunno though seems a bit high). I would recommend using that as your absolute cap. Don't do 3.3v though... that memory won't last too long.
-Kev

okey ... im using 2.7v right now as it seems that i have got the crappiest pair of crucial memory in the whole universe.... wont even to cas2 / 133@2.5v .... an no i dont have any form of warranty :(

crucial likes voltage, most people find they need 2.8+ to get decent results out of it. I've seen people running it at 3v or more for 6 months or so

Sounds like you have some shady memory. Most crucial can hit 150 mhz FSB w/ moderately agressive settings @ default voltage. I don't think the voltage is your problem. Your problem lies elsewhere.
-Kevin

im thinking of other things that can be the problem but cannot figure it out. my setup if it helps you out in any way .

chieftec(antec) midicase
epox 8kha+ w/ latest beta bios (havent tested others yet)
xp1600+ /w taisol (ystech 26cfm, waiting for new radiator)
2 crucial unbuffered unregistered, non parity pc2100 256mb(512mb)
MSI Geforce2mx400 (not playing any 3dgames so it doesnt matter, in the agp slot of course)
Netgear FA311 (10/100mbit NIC in PCI4 as this is said to be best
in the 8kha+ guide on amdmb.com)
Seagate Barracua 4 (40GB)
Generic floppy

and yes its true i have no form of cd reading device... still waiting for my 24x cdrw drive to come.... :(

change it to 3/4 mem timing, and see how high you can run that way, it will tell you if your ram is holding you up or if it is something else

i will try this out also. ill report back when i have done so.

right now im running only one of my dimm´s @158mhz / cas2 / turbo /2.6v ... will probably go higher also... but i really hate this as i really really would like to have 512mb of ram.... not that i use it that much anyways .... but as long as i have it laying around...

Generally as a rule of thumb with SDR less sticks will do a higher OC than more. IE you will get more out of 1 256MB stick than 2 256MB sticks. This probably holds true to DDR as well. I too will be running a 8KHA+ with one 256MB stick of Crucial and will let you know what kind of OC I can get. I hear 160 FSB is about the highest most have gotten with crucial.

thats a northbridge issue though, it has nothing to do with the ram. It's why to fill all 3 or 4 slots you will often need registered and ecc ram

running 158mhz w/ 2.6v vdimm.... rolling along just fine... i will run my pc a while with only one stick as i really like the 2000+ sign in the bios bootup and the extra 267mhz i got out of getting rid of one of my modules... it posts upp to 180mhz bus with 2.8v vdimm also.... :) but my cpu doesnt like those speeds :)

I've gotten Crucial 2100DDR up to 169/170Mhz. I did it at 2.7v on a MSI KT-266PRO. The downside is that the board has AGP problems above 140Mhz FSB so I had to settle it back down. :cry: