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Sylv@in Guest


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P35-DS3R Vdrop and Vcore failed Sylv@in Sep 28th, 07, 02:29 PM #1

Hello,

I've make a topic on P35-DS3R and I've make a link on the mod page

But the Vdrop et Vcore mod (pencil) don't work.

The voltage decrease when we make the Vdrop mod.

I hope that Shamino can correct this.


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chispy
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chispy Sep 28th, 07, 08:54 PM #2
It works fine on my board , maybe you are not doing it correctly. If Pencil Mod dont work for you for vdroop you must be doing something wrong. What pencil are you using? Have you measure voltages with multimeter?
I have done both mods on my board and they do work if done correctly , now i did the mod with VRs in it is stable as a rock, but before the VRs i did the Pencil mod and worked like a charm ,Maybe its your board, dunno , but Shaminos guide mods work 100% and have been tested by many of us
Try to redo the pencil mod removing it and reapplying it.

Good Luck.
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Last edited by chispy; Sep 28th, 07 at 09:09 PM..
Sylv@in Guest


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Sylv@in Sep 28th, 07, 09:43 PM #3
Ok you are the one who say it's work

Can I have a picture of the mod ?

Pencil : 2B or 4B
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T_M Oct 1st, 07, 05:22 PM #4
Why do you need another picture?
Get a damn pencil and colour in the resistor.
Its not rocket science.
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DaFunky Oct 2nd, 07, 09:15 PM #5
Hi,

I tried with Sylv@in the VDroop mod on my DS3R. These are the facts :

- I've used three different pencils. I've tried the mod twice with each pencil.
- Every pencil showed a change in the VCore
- Every time the VCore was more or less lowered instead of being stabilized

I've used a Ohmmeter (Voltmeter), and each time I could see that the resistance was lowered after having applied the pencil.

Once, the Vcore was lowered from 1.47v idle under Vista (before the mod) down to 1.26v after the mod. Another time, the VCore was lowered about 0.1v. I didn't measure the real voltage but sometimes the PC didn't even boot.

I don't understand what's happening, I will try with a new 2B or 4B pencil but I'm a bit sceptical...
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Last edited by DaFunky; Oct 2nd, 07 at 09:18 PM..
harshal
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harshal Oct 3rd, 07, 02:57 AM #6
I think this one was not correct... as I read on other forums also saying it was lowering da VCORE... which is opposite of what one wants
I have not yet tried it...
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gustep12 Oct 6th, 07, 08:16 AM #7
Hi Sylv@in,

How about you get a soldering iron and do a hard mod? It's a bit more difficult than a pencil mod, but it gives much more predictable results.

I think the p35 has a voltage regulator with an offset pin (pin #10, look online for isl6327 voltage regulator docs). This pin is usually not connected to anything.

If you connect this pin with a variable resistor to either ground or Vcc, you have a volt mod. Can't guarantee that it's that easy on your board, but on my ASRock 775dual-VSTA, this was the perfect way to do it.

For the droop / Vdrop mod, the best way is to find all components that are part of the feedback loop and scale them down: resistors to half the value, capacitors to twice the value. This way you don't change the overall gain or frequency response at the FB pin, but you change the amount of droop.
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gustep12 Oct 6th, 07, 08:18 AM #8
P.S. I forgot to mention that for soldering on your board, I have found a battery-powered iron the best. I got one for ca. $12 at Fry's (the Hakko fx-901), it has 4x AA batteries and a really fine tip, perfect for doing fine work on a board. It's also perfect because you're not restricted by a power cord.

Highly recommended.
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dnottis Nov 2nd, 07, 11:49 PM #9
Shamino's pencil mod for vdroop on the DS3R DOES NOT WORK.
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Th0m59 Nov 18th, 07, 10:51 AM #10
Hi, I found the Vdroop mod recently it works perfectly
1.5V Bios
1.488V CPUZ IDLE
1.504V CPUZ FULL



Just connect the 2 pins of the resistor using solder or silver conductor



Ive done the mod only with that



Now have fun with this excellent motherboard, P35 DS3R FTWWWWW
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jmmtn4aj Nov 18th, 07, 11:59 AM #11
Or get a LP UT T2R This board is freaking amazing, there's an option to simply turn it off, so voltage stays 100% constant on idle and load.
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Th0m59 Nov 18th, 07, 08:59 PM #12
Hehe thats not the same price jmmtn4aj P35-DS3R from gigabyte : <100€, the DFI>200€
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Clint Nov 19th, 07, 09:25 PM #13
Quote:
Originally Posted by Th0m59 View Post
Hi, I found the Vdroop mod recently it works perfectly
1.5V Bios
1.488V CPUZ IDLE
1.504V CPUZ FULL



Just connect the 2 pins of the resistor using solder or silver conductor



Ive done the mod only with that



Now have fun with this excellent motherboard, P35 DS3R FTWWWWW

Very interesting

Does anyone know if this mod can be done on the GA-G33M-DS2R board as well?
...it looks like a very convenient way of get rid of that awful Vdroop.
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purepo0nage Dec 2nd, 07, 04:34 AM #14
hmm..would this mod work with the p35 ds3?

it looks the same, smells the same, but dont know if it will work the same

any ideas?
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messerchmidt Dec 9th, 07, 01:24 PM #15
check on madshrips or xtremesystems,

found a working vcore/vdroop for my p35c-ds3r on madshrips
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