3.3v Vddr mod on msi k8n neo2 / pdp tccd

bobmanfoo · Dec 21, 2004

did a vdimm mod by soldering wires from +3.3v rail to vdimm cap., i modded a pair of molex plugs to act as a brigde to open/close the line. it seems my chips respond well to more voltage as i expected, results:
2.85v
215mhz 2-2-2-5
243mhz 2-3-3-5
260mhz 2.5-3-3-6
280mhz 2.5-4-4-8

3.3v
230mhz 2-2-2-5
255mhz 2-3-3-5
270mhz 2.5-3-3-6
285mhz 2.5-4-4-8

:clap:

EDIT: hmm seems like the ram could use more voltage, when i turn barely turn down the pot on the +3.3 rail my speed and timings get unstable, from 3.34v in bios to 3.3v in bios.
whats the max i could turn up the +3.3v rail with out damaging other components? would damage anything by running with the led on my OCZ powerstream red? its going to turn red if i turn it up alot more, tia
a pic of vdimm mod (original from RebelsHaven): PERFORM AT YOUR OWN RISK and remember to cool the ram

flapperhead · Dec 21, 2004

nice, looks like the mod really helped...

Osirus · Dec 21, 2004

Can you get more pics of what it looks like?

bobmanfoo · Dec 21, 2004

Osirus said:
Can you get more pics of what it looks like?

just added new pic, i don't think gskill sticks like high voltages but you could give it a try

Osirus · Dec 21, 2004

I know they dont need the high volts to achive insane speeds, I was just inquiring on how it was done. Looks nice though!
Could you use a 'on/off' switch to act as a bridge instead of another molex connector?
Have you tested this with a voltmeter yet?

bobmanfoo · Dec 21, 2004

haven't tested with multimeter yet, will do it soon, but my 3.3v rail led is green so it should be ok

an on off switch would work fine, i just used whatever i had laying around

Suma · Dec 21, 2004

Osirus said:
I know they dont need the high volts to achive insane speeds, I was just inquiring on how it was done. Looks nice though!
Could you use a 'on/off' switch to act as a bridge instead of another molex connector?
Have you tested this with a voltmeter yet?

Ofcourse you can, it does the same thing.
what do you mean by "Tested it with a voltmeter"?

Suma.

Osirus · Dec 21, 2004

testing with a voltmeter will insure there is no fluxuation on the 3.3v line. I would hate to do this to a board and come to find out there is a variation on the 3.3v line. For example, I dont have any way to find out if my 3.3v line is holding stable unless I put a voltmeter on it.

bobmanfoo · Dec 21, 2004

Osirus said:
testing with a voltmeter will insure there is no fluxuation on the 3.3v line. I would hate to do this to a board and come to find out there is a variation on the 3.3v line. For example, I dont have any way to find out if my 3.3v line is holding stable unless I put a voltmeter on it.

well i don't know my exact voltage but according to mbm5 and corecenter, it goes from 3.33v-3.34v, so very little fluctuation

Suma · Dec 21, 2004

Osirus said:
testing with a voltmeter will insure there is no fluxuation on the 3.3v line. I would hate to do this to a board and come to find out there is a variation on the 3.3v line. For example, I dont have any way to find out if my 3.3v line is holding stable unless I put a voltmeter on it.

Oh I see what you ment there.
Well my modded TP550w's 3.3v is @ 3.45v rock stable, idle/stress it doesn't care

Suma.

Osirus · Dec 21, 2004

Nice Suma... well I know the Gskill doesnt need insane volts to get insane speeds.. plus I dont like to generate more heat then needed. Its a nice and simple mod though! IF I ever go SLI, Ill mod this board just to see how it works.
Until then, no modding for me!
If we can get more people to do this, I vote sticky!

bobmanfoo · Dec 21, 2004

Osirus, someone on xtremesystems gave his gskill 3.3v and it worked out well for him....

Joe Camel · Dec 21, 2004

bobmanfoo said:
Osirus, someone on xtremesystems gave his gskill 3.3v and it worked out well for him....

that was me.

3.28v (abit bios) seemed to let me run 2-x-x-x into the high 260's

<3.0v it wouldnt

seemed to help tighten timings more than higher HTT/FSB

Osirus · Dec 22, 2004

hum.. So Joe Camel, what Gskill are/were you using?

3.3v Vddr mod on msi k8n neo2 / pdp tccd

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