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01-02-2007, 12:57 PM
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#1
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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Biostar TForce P965 Vdroop?
Hi guys;
I'm looking for the Vdroop mod of the Biostar TForce P965 Deluxe / PT...
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Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-02-2007, 01:45 PM
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#2
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Xtreme Member
Join Date: Jun 2006
Location: Belgium - Brussel
Posts: 237
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t'as trouvé le vmch ? 
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01-02-2007, 04:16 PM
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#3
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IT Engineer in the making
Join Date: Jun 2003
Location: Former Kingdom of Bavaria
Posts: 2,026
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VCore controller chip used on the board?
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Quote from one of our professors:
"Reality is hiding in the imaginary part." 
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01-03-2007, 07:43 AM
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#4
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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ISL6322CRZ http://www.intersil.com/data/fn/fn6328.pdf
@Quentin: non pas encore; effectivement, le Vdroop est plus important 
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-03-2007, 11:37 AM
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#5
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IT Engineer in the making
Join Date: Jun 2003
Location: Former Kingdom of Bavaria
Posts: 2,026
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Please measure resistance between FB and IDROOP.
If I'm not mistaking, droop is regulated through a resistor and capacitor network between these pins, according to the datasheet.
__________________
Quote from one of our professors:
"Reality is hiding in the imaginary part."
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01-03-2007, 12:50 PM
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#6
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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Yes, I think so too.
So, add an variable resistor between FB and Idroop would solve this Vdroop issue.
Let's find easy access point linked to these FB and Idroop pins and fnd the good trimmer value thanks to the resistance there is between this 2 points.
I'll make a graph
Quentin
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01-03-2007, 02:08 PM
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#7
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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Thx so much to both of you
I'll make the measure tomorrow.
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-04-2007, 01:31 AM
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#8
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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So, I've measured FB to IDROOP diff and I always found 0.4ohm... 
I've tried measuring directly from the controler, but also from external points.
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-04-2007, 05:31 AM
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#9
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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God damnit 
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01-04-2007, 09:12 AM
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#10
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IT Engineer in the making
Join Date: Jun 2003
Location: Former Kingdom of Bavaria
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Seems as if the idroop pin is directly connected to the fb pin. Looks as if it would be best to find the feedback resistors for each phase and change these. Will have a look at that soon.
__________________
Quote from one of our professors:
"Reality is hiding in the imaginary part."
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01-04-2007, 09:45 AM
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#11
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IT Engineer in the making
Join Date: Jun 2003
Location: Former Kingdom of Bavaria
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Quote:
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Originally Posted by celemine1Gig
Will have a look at that soon.
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OK, had a look. Please measure resistance between VDIFF (pin#16) and FB (pin#14).
__________________
Quote from one of our professors:
"Reality is hiding in the imaginary part."
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01-04-2007, 12:26 PM
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#12
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
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Difference between FB and VDIFF is 2.12Kohm.
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-04-2007, 02:57 PM
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#13
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IT Engineer in the making
Join Date: Jun 2003
Location: Former Kingdom of Bavaria
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Quote:
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Originally Posted by before
Difference between FB and VDIFF is 2.12Kohm. |
Try and connect a 100K trimmer potentiometer, set to maximum resistance, between FB and VDIFF. Trimming it down should decrease vdroop.
Edit: 50K should also work.
__________________
Quote from one of our professors:
"Reality is hiding in the imaginary part."
Last edited by celemine1Gig; 01-04-2007 at 03:01 PM.
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01-05-2007, 12:34 AM
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#14
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
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Ok;
based on the same pic; does that make sense? Guess I'm right, but I prefer to ask prior doing wrong things...
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-05-2007, 02:35 AM
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#15
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IT Engineer in the making
Join Date: Jun 2003
Location: Former Kingdom of Bavaria
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Looks good to me, but I don't own the board, so I can just judge from the pic. Now connect the VR between these solder points and hopefully vdroop will decrease when fine-tuning the resistance. At least according to the datasheet it should, as R(fb) needs to be decreased because [Vdroop = I(avg) x R(fb)].
__________________
Quote from one of our professors:
"Reality is hiding in the imaginary part."
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01-05-2007, 04:09 AM
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#16
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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Quote:
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Originally Posted by celemine1Gig
Looks good to me, but I don't own the board, so I can just judge from the pic. Now connect the VR between these solder points and hopefully vdroop will decrease when fine-tuning the resistance. At least according to the datasheet it should, as R(fb) needs to be decreased because [Vdroop = I(avg) x R(fb)].
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Yea of course Thx so much for your input.
I'll do that ASAP.
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-05-2007, 04:32 AM
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#17
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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I had a look at the datasheet, and indeed that should work
I'd rather use 50k trimmer :
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01-05-2007, 05:15 AM
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#18
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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01-05-2007, 06:05 AM
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#19
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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First time I see the same solder point for both Vcore and Vdroop mods.
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-05-2007, 07:40 AM
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#20
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Xtreme Enthusiast
Join Date: Sep 2005
Location: Belgrade, Serbia
Posts: 593
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Quote:
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Originally Posted by before
First time I see the same solder point for both Vcore and Vdroop mods.
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Before did u try it? No problems with both vcore&vdrop mod?
p.s. Does anybody know where are the readpoints for vmch&vcore?
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Born to overclock
Last edited by Misko; 01-05-2007 at 07:42 AM.
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01-05-2007, 08:41 AM
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#21
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Xtreme Member
Join Date: Jun 2003
Posts: 440
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Quote:
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Originally Posted by before
First time I see the same solder point for both Vcore and Vdroop mods.
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didn't even know that was possible...
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E6600 @ 3.2ghz (400x8), P5B Deluxe, 2GB Ballistix DDR2-1000 @ 600mhz 5-5-5-15, X1950 Pro, Antec Neo HE 500w
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01-05-2007, 10:38 AM
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#22
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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Quote:
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Originally Posted by Misko82
Before did u try it? No problems with both vcore&vdrop mod?
p.s. Does anybody know where are the readpoints for vmch&vcore?
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Please post a pic of the socket area.
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01-06-2007, 09:18 AM
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#23
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reaching perihelion
Join Date: Nov 2005
Location: Aix-en-Pce | France
Posts: 1,569
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The Vdroop mod is working perfectly!
Thx both celemine1Gig & Quent for your help
__________________
Best Regards,
Xavier
"I prefer to fly alone... when alone, I perform those little coups of audacity which amuse me..." Col. René Fonck (1894-1953), the Ace of Aces.
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01-06-2007, 09:25 AM
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#24
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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Nice to hear, let's have a look at the MCH one !
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01-06-2007, 09:40 AM
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#25
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Xtreme Member
Join Date: Oct 2005
Posts: 233
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I bet the red circled controller is the VDDRII one, and the yellow could be the Vmch one.
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