Any Mods for the Gigabyte P965 "DS3" Boards?

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08-01-2006, 02:41 AM
kiwi

Hmm, my MM shows 0.1V higher voltages for vcore, vdimm and vmch than they are in bios. Could it be that the board is overvolting?
08-01-2006, 05:23 AM
quent

Quote:

Originally Posted by persivore

For the Vdroop mod a resistor needs to be connected between the 2 points I've marked. It looks like these points are going to be too small to solder to, so some alternative points will need to be used.

The traces connected to the 2 pins appear to disappear to other layers of the board, so it isn't possible to trace them from the picture, so someone with the board will need to find alternative points to use.

To find alternative points, set a multimeter to a low resistance range (should be 200 ohms on most multimeters). Put one probe on one of the pins on the Vcore regulator and use the other probe to check the resistance between the pin on the Vcore regulator and various resistors/capacitors surrounding the Vcore regulator. Once you find a point which has <1.5ohm resistance between the Vcore regulator pin and resistor/capacitor leg, the points are almost certainly connected and can be used as an alternative solder point.

Edit: can someone also check the resistance between the 2 pins please.

I'll try this as soon as i get mine.

Thanks.
08-01-2006, 07:33 AM
tvdang7

this is interesting. but what does upping those do

1)vdimm
2)mch
3)FSB
08-01-2006, 10:27 AM
thunderstruck!

Quote:

Originally Posted by tvdang7

this is interesting. but what does upping those do

1)vdimm
2)mch
3)FSB

1) Self-explanatory.
2) Overvolting mch gains more FSB
3) Overvolting fsb shows little to no results.

Don't worry for now, since you have an A64.
08-04-2006, 09:01 AM
splmann

Hi !

i woud like to make the mch mod but i have only a 10K Variable Resistor is this also possible ?

Regards

Roger
08-06-2006, 01:55 AM
irenic

what's the stock vmch? 1.2v?
08-06-2006, 02:42 AM
d@rkn1ko

Quote:

Originally Posted by irenic

what's the stock vmch? 1.2v?

yes 1.2v :D
08-07-2006, 07:14 PM
Lestat

i can do 400+ fsb on stock vmch. with my DS3...

dang i wanna mod mine but i hate voiding the warranty.

i actually should say i want our Alaskan friend to mod it lol i cant handle a sodlering gun on those small of point in that tight of a space. lol.
08-08-2006, 07:32 AM
Lestat

so these pencil mods.
i'd do them but one thing keeps coming to mind and that was the pencil mod for the P5Wdh2-E Prem. it limited my vcore to 1.5v

anyone tried the pencil mod to know if this limits your vcore to a certain amount? i cant do it if thats what happens. this baord already has enough voltage limits.
08-08-2006, 08:51 AM
kiwi

vmch pencil mod works, I did not see gains though, at least not yet, max on air 497 1.4-1.6vmch, under vapo 518 1.6vmch (this was minimum vmch after mod) - 1.8vmch

And note that if your FSB is overclocked Normal voltage = +.3V, so after pencil mod I had
Normal = 1.8V
+.1 = 1.6V
+.2 = 1.7V
+.3 = 1.8V

Vdimm somehow did not work, might give another try.

518 might be RAM limit although corsair D9 should do more at 2.4V and relaxed timings
08-08-2006, 04:09 PM
Lestat

normal vmch +3 is only 1.5v so you got a pretty big increase. considering its only a pencil mod.
i dont like pencil mods though
they arent stable, droop and fluctuations are still an issue
and as for vcore pencil mods those tend to be... well.. iffy.

i want to do the core droop mod but looking closely at the motheboard with a very small close up lense shows that there is already a resistor there.
i do not quite see how bpassing the resistor by solding over it will help droop/

kiwi you know more about this than i do.
can you provide any input into the vcore droop mod.

here is where i am getting the pictures.
http://sg.vr-zone.com/?i=3870&s=9
08-09-2006, 03:17 AM
ArcTan

does mch actually have an effect on fsb?
I'm on stock mch and using +0.3v doesn't gain anything
08-09-2006, 06:02 AM
kiwi

Yeah, there is 2K resistor but I haven't tried mod yet. I have 0.02V drop at load. Shamino noted 0.05V drop which sounds quite a lot :eek:

Well, at least cpu cooling helps that is for sure
497 -> 518 (maybe more)
air -> vapo

Ofcourse some cpus can do more
08-09-2006, 10:06 AM
misteroadster

Anybody can find the vcore mod , cause in bios after 1.6V it's 1.8V but's it's too much , i would like to have 1.7V :D

Thanks ;)
08-09-2006, 02:33 PM
Kunaak

Quote:

Originally Posted by misteroadster

Anybody can find the vcore mod , cause in bios after 1.6V it's 1.8V but's it's too much , i would like to have 1.7V :D

Thanks ;)

you might try doing the Vdroop mod, with a VR.

sometimes, when you adjust the VR too much on Vdroop mod, the vcore, goes up alittle, instead of just stabilizing.
goes up like .3 in the case of my old Asus 955X.
08-09-2006, 04:38 PM
misteroadster

after some tests, i'm not limited by the Vcore.

In fact i just need 1.45V to bench 1M @ 4500Mhz, i just need FSB, i think it's cpu related :/

i would like to test your 6600 530FSB approved under caskad :D

100% oc is my goal :)
08-12-2006, 02:41 PM
BottomsUp

Hi Guys,

When i read the vmch point i get 1.35v and it doesn't change when i up to +.3v in the bios. What could be causing this?
08-13-2006, 01:05 PM
kiwi

Which bios?
08-13-2006, 02:21 PM
BottomsUp

This has been resolved. I shorted teh cmos taking the reading and for some reason mch wouldn't move after that. Loading optimized defaults fixed it. It now reads correctlly
08-13-2006, 05:11 PM
Kunaak

Has Anyone had any luck with finding the VFSB mod?
08-13-2006, 10:15 PM
Lestat

Kunaak you might be one of the few people who would know this.

wth does vFSB do anyways ? the NB controls the fsb and memory so why have mch (northbridge) and vFSB ?

so far the vFSB setting does absolutely nothing to improve overclocks from everything that has been tested thus far.

are you onto something that maybe we havent seen ?

also what would haven if i soldered, lets say a oh i dont know a 20k or 50k resistor without the POT. just tie in the little resistor ?
would that just fry it ? or would it overvolt it incredibly high because you adjust it ?

anyone thought about adding the missing CAP's to this board.
there are 2 caps missing right beside the vcore measure point. they both read vcore so...
there are also a few others missing around the place.

not sure if it would help but more caps definately isnt going to hurt.
08-19-2006, 03:44 AM
soki

Quote:

Originally Posted by persivore

For the Vdroop mod a resistor needs to be connected between the 2 points I've marked. It looks like these points are going to be too small to solder to, so some alternative points will need to be used.

The traces connected to the 2 pins appear to disappear to other layers of the board, so it isn't possible to trace them from the picture, so someone with the board will need to find alternative points to use.

To find alternative points, set a multimeter to a low resistance range (should be 200 ohms on most multimeters). Put one probe on one of the pins on the Vcore regulator and use the other probe to check the resistance between the pin on the Vcore regulator and various resistors/capacitors surrounding the Vcore regulator. Once you find a point which has <1.5ohm resistance between the Vcore regulator pin and resistor/capacitor leg, the points are almost certainly connected and can be used as an alternative solder point.

Edit: can someone also check the resistance between the 2 pins please.

persivore are you sure is pins 14(fb) and 16(vdiff) that need to be shorted/put a vr? I tried the vdroop mod on ds4(dont really need it, just for fun) it has ISL6307(6 phase) and the pins are 15(fb) and 17(vdimm). When I short them the mobo didn't start. It seems pins 15(fb) and 16(idroop) are connected on ds4 by the way.
08-19-2006, 08:41 AM
doom_st

Quote:

Originally Posted by Kunaak

Found the VDimm Mod.

Pic removed from this post to save on bandwidth.

And the Chipset Mod.

Pic removed from this post to save on bandwidth.

Thanks Shamino :)

now any ideas on the Vdroop or VFSB? ;)

Vdroop is what I am more interested in.
set 1.4 volts in bios, get 1.34 volts under load... not cool.

can someone tell where is ground pin for each mod????

-edited to save on bandwidth, no need to repost pics that are already here.
-Kunaak-
08-27-2006, 03:11 PM
Bobtod

Quote:

Originally Posted by doom_st

can someone tell where is ground pin for each mod????
[/I]

I usually take it off a 3pin mobo fan header

Thanks for the heads up on these mods guys! But I seem to be having some strange voltage readings with my board before and after mod.

With stock board, VGMCH voltages:
Stock = 1.31v ???
+0.1v = 1.17v
+0.2v = 1.24v
+0.3v = 1.31v

I checked this twice but still read the same! Not really really a problem now I know.

After mod: 20k VR set at 2.6k
Stock = 1.55v ???
+0.1v = 1.48v
+0.2v = 1.51v
+0.3v = 1.54v

Looks like my board has some issues, I wondered why I couldn't get any more fsb by raising VGMCH in bios (it was actually lowering it!).

Bios is F4, I've cleared cmos and loaded optimised settings and readings are still the same although I did notice before clearing bios the voltage used to fluctuate during startup.

The other wierd thing is if I remove the ground for the mod my voltages go real low:

Stock = 0.82v ???
+0.1v = 0.65v
+0.2v = 0.74v
+0.3v = 0.82v

The only thing I can think of is I had a real problem soldering the wire to the read point and could I have overheated/damaged the 3pin chip? Got it first time with the 8pin chip, best job I had ever done :D

Also it wont boot past 1.55v VGMCH

E6600, 4x1gb G.skill HZ, 120mm fan over zalman nbf47 northbridge cooler, testing with stock HSF. Max stock FSB boot at 365, after zalman + fan + 1.55v 410-420 fsb. Hardly worth fitting my vapo at this rate :( Only bought this mobo while I wait for the RD600! I had to get a conroe NOW!

any suggestions to whats up? or have I fubared my mobo within 24hours :D

bt
08-29-2006, 08:19 AM
Maxxpower

are those mods valid for the 965p ds4?

sorry for my bad english

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