Aopen i975Xa-YDG Mod

[hicookie]

vcore-mod



vdimm-mod




Edit by runmc - hicookie I have removed this image untill it has been tested and your sure it is correct. thank you for your support.

[kiwi]

Do you know how high vcore will be at start if I put 50K VR for vcore mod?


Thanks

[stummerwinter]

Thanx for sharing!

but, maybe I´m to stupid, could you explain al little more the NB V-Mod?

Is it right to solder from pin#2 to ground a 10 kOhm VR?

[Hell-Fire]

Thanx for sharing!

but, maybe I´m to stupid, could you explain al little more the NB Vdimm-Mod?

Is it right to solder from pin#2 to ground a 10 kOhm VR?

His resistances are correct, but the wording is just a bit off.

He misused the term Vcore for the NB/Chipset mod.

The NB/Chipset is the 10K resistor mod, and Vdimm is the 20K resistor mod.

Very nice guide and pics. Thanks for sharing.

[stummerwinter]

vdimm-mod

Which Vdimmm is possible with that?

Sry, to early, mixed up a few words...

[Hell-Fire]

What do you mean: Which Vdimm is possible with that?

I dont understand what you are asking. Are you asking how high the Vdimm will go?

[hicookie]

vcore-mod vr i'm using 100k vr, starting at 1.5V(bios Auto voltage)
ddr2-vdimm, i tested 2.2V-2.6V working fine

[ibby]

intresting.
But have you managed to lift the bios fsb limitation ?
ibby

[Hell-Fire]

intresting.
But have you managed to lift the bios fsb limitation ?
ibby

What do you mean by "lift the bios fsb limitation"?

[ibby]

i read some where that the bios was limited to 255mhz.

[Hell-Fire]

If thats the case, a vmod will not change that.

A new bios, or modded bios, is the only thing that can change bios settings.

[stummerwinter]

vcore-mod vr i'm using 100k vr, starting at 1.5V(bios Auto voltage)
ddr2-vdimm, i tested 2.2V-2.6V working fine

@hicookie: thanx

@hell-fire: thats´s what i want to know...

[Chri$ch]

vcore-mod

if i measure at this point i get 1.2v if i set the vcore in bios to 1.5v, is it the
right measure point?

[Dumo]

Heres Tcore mod (for cold boot problem @ subzero) from kyosen http://www.xtremesystems.org/forums/...postcount=1601

[hipro5]

A L A R M .....





DON'T do the hicookie's VCore NB Mod coz IT'S NOT the NB Core....

It's the Vio of the i975 chipset and you'll measure NOTHING on the spot he pointed out for measuring.....You'll measure the REAL Vchip voltage BUT NOT coming from the regulator he's pointed out.....

WRONG REGULATOR........I just BLOW UP my AOpen mobo (Northbridge chip) by trimming the trimmer and NOT showing anything changing on the spot he has pointed coz there's NOTHING to do with this.......

It costed me 400$ this "Mod".......I was so anxious to mod my mobo that I thought not to search for Vchip Mod coz there was already be done by someone else, so I did this mod......BAD think......

QUESTION: @ hicookie....DID you do this mod on your mobo?.....DID you see changing by trimming the trimmer onto the measuring spot you are showing in your photo?......OR you just presume that this might be the VChip mod?.....



A L A R M .....


.

[dinos22]

damn hipro.....no good mate

[C_B]

another German guy lost his board after this mod ...

that´s bad
hicookie don´t you test your modifications?

[s7e9h3n]

vcore-mod vr i'm using 100k vr, starting at 1.5V(bios Auto voltage)
ddr2-vdimm, i tested 2.2V-2.6V working fine

OK...what have I done wrong? Even after the mods, my vdimm is maxed out @ ~2.3V and the Vcore is maxed out @ ~1.64. In your pics you point to a specific pin on the IC's for the mods but you have soldered the wires to caps instead. Are we supposed to solder to the same caps? Or are we supposed to solder directly to the pin on the IC? I just assumed the solder points you used were alternate locations for the vmod, so I used the same. That may be the problem with my mods

[hicookie]

another German guy lost his board after this mod ...

that´s bad
hicookie don´t you test your modifications?

sorry, i have not certify the nb vhip vmod....

[dinos22]

is that problem mod image still there take it off dude

[stummerwinter]

if i measure at this point i get 1.2v if i set the vcore in bios to 1.5v, is it the
right measure point?

I got the same results...

Which is the real VCore-measurepoint-point?

[OC_Windforce]

sorry...
two questions... ^^

V/io voltage are originally how much.?

If MOD, is regulated from voltage that is established in bios..?
ex) Vcore(bios 1.3V) + Vcore MOD(?) = 1.3 + (?)

[stummerwinter]

I made some measurements:

Set in BIOS <-> showed in BIOS <-> measure point from hicookie

1.250 V - 1.24 V - 1,006 V
1.300 V - 1.29 V - 1,084 V
1.350 V - 1.35 V - 1,072 V (!)
AutoVC - 1,37 V - 1,110 V
1.400 V - 1,39 V - 1,155 V
1.450 V - 1.44 V - 1,172 V
1.500 V - 1.48 V - 1,201 V

BIOS: 1.03
Mods: no

[Bluebeard]

any updates on how to fix it the right way?

[runmc]

if i measure at this point i get 1.2v if i set the vcore in bios to 1.5v, is it the
right measure point?

I had vcore set to 1.5v in bios and it showed 1.49 on my mm using hicookie measure point. I checked it with a cheap mm I had and got low volts measurement. Then I checked it with a better mm with new batteries and got the above reading.

Another view of the vcore mod.