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01-22-2005, 05:08 AM
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#1
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Xtreme Member
Join Date: Aug 2002
Posts: 216
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VCORE mod for MSI K8N SLI mobo needed!!
Hi, vdimm is done by ocz ddr booster, but i NEED more voltage to the cpu!
Can it be done? Has anyone done it? Pics?
HELP! 
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01-27-2005, 03:04 PM
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#2
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Moderator
Join Date: Jun 2002
Location: Denmark
Posts: 807
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Quote:
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Originally Posted by tombman
Hi, vdimm is done by ocz ddr booster, but i NEED more voltage to the cpu!
Can it be done? Has anyone done it? Pics?
HELP! |
Haven't tried myself yeat 
Be carefull M8
Edit: now the picture is right.
__________________
Best OC Regards
Tom Holck
Denmark
The Homeland of nVentiv and Asetek
Last edited by Tom Holck; 04-12-2005 at 01:56 AM.
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01-27-2005, 10:45 PM
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#3
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Xtreme Member
Join Date: May 2003
Location: Holland
Posts: 256
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Quote:
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Originally Posted by Tom Holck
Haven't tried myself yeat
Be carefull M8 |
Yes this should be the mod altough it is extremely tiny ..... damn ...
Vdimm mod maybe ?
__________________
Cpu: Core i7 920 @ 4.6 Ghz 1.33V (24/7)
Mainboard: Classified E760 @ B3 X58
Memory: 6GB Kingston Hyper @ 1770Mhz 7-7-6-22 -> 1.65V 3
Graphics Card: HD5870 + Waterblock
Soundcard: Auzentech X-Fi Forte
Boot HDD: WD Velociraptor 300 GB
Stuff HDD: 4x 1TB Samsung HD103UJ @ Raid5 (Perc 5i + 512MB)
PSU: Corsair 1000Watt Modulair
Water Cooling Setup: WC Setup - Swiftech Apogee XT / EK 360 Rad / 3x Triebwerk TK-122 / MCP655 Pump / Swiftech Reservoir
All build in a Corsair Obsidian 800D
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01-29-2005, 11:50 AM
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#4
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Moderator
Join Date: Jun 2002
Location: Denmark
Posts: 807
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This works:
VR 20k ohm, turned to about 14-12 k ohm.
It will give you a little under 1.85 volt. If you try going higher the OVP shot down. Then go a little back. Then you have your max corevolt.
__________________
Best OC Regards
Tom Holck
Denmark
The Homeland of nVentiv and Asetek
Last edited by Tom Holck; 01-31-2005 at 03:22 AM.
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01-29-2005, 02:59 PM
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#5
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Xtreme Member
Join Date: May 2003
Location: Holland
Posts: 256
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Quote:
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Originally Posted by Tom Holck
This works:
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Nice thanks tom this is far more easy to solder than pin 9  :banana4:
__________________
Cpu: Core i7 920 @ 4.6 Ghz 1.33V (24/7)
Mainboard: Classified E760 @ B3 X58
Memory: 6GB Kingston Hyper @ 1770Mhz 7-7-6-22 -> 1.65V 3
Graphics Card: HD5870 + Waterblock
Soundcard: Auzentech X-Fi Forte
Boot HDD: WD Velociraptor 300 GB
Stuff HDD: 4x 1TB Samsung HD103UJ @ Raid5 (Perc 5i + 512MB)
PSU: Corsair 1000Watt Modulair
Water Cooling Setup: WC Setup - Swiftech Apogee XT / EK 360 Rad / 3x Triebwerk TK-122 / MCP655 Pump / Swiftech Reservoir
All build in a Corsair Obsidian 800D
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02-05-2005, 06:01 AM
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#6
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Xtreme Member
Join Date: Jan 2005
Location: NL
Posts: 121
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Sorry, I'm a bit of a noob when it come's to modding. But what am I actually supposed to do with that VR 20K ohm? Could somebody explain it a bit further for me?
Thanx 
Edit->
Nevermind.. I took a look at my board and this is WAY to small for me to solder....
__________________
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt." -Rami Belson | Specs!
Last edited by A_X; 02-05-2005 at 09:12 AM.
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02-06-2005, 11:26 AM
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#7
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X.I.P.
Join Date: Nov 2004
Location: NYC
Posts: 3,255
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Will try, since no bios released yet...
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02-06-2005, 01:05 PM
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#8
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Registered User
Join Date: Feb 2005
Posts: 32
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Are you sure about the 20k ohm VR? Anyway, I will be buying the 20k VR tomorrow and wait for your reply.. Could you also please explain how you came up with the 20k VR? This really fascinates me and I would like to know a little bit more in detail.
Thank you!
john
Last edited by JohnnySK; 02-08-2005 at 09:45 AM.
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02-06-2005, 10:49 PM
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#9
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Xtreme Member
Join Date: Jan 2005
Location: NL
Posts: 121
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Quote:
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Originally Posted by JohnnySK
Are you sure about the 20k ohm VR? Using a multimeter I got 1,2m ohm on the C5 - isn't 20k too little? Anyway, I will be buying the 20k VR tomorrow and wait for your reply.. Could you also please explain how you came up with the 20k VR? This really fascinates me and I would like to know a little bit more in detail.
Thank you!
john |
Please post pics of your mod!
Thanx!
__________________
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt." -Rami Belson | Specs!
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02-07-2005, 01:30 AM
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#10
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Registered User
Join Date: Feb 2005
Posts: 32
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Just wanted to make sure that I will do the right thing..
I am supposed to unsolder the C5 capacitor and solder the 20k ohm VR instead? Or connect it parallel to the C5 capacitor? Just need this info and I will get going with the mod
Fast relies are welcome,I am just waiting for this info...
john
Last edited by JohnnySK; 02-08-2005 at 09:44 AM.
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02-07-2005, 01:36 AM
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#11
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Xtreme Vmod mod
Join Date: Aug 2004
Location: Cornwall/Newcastle uni, UK
Posts: 1,251
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You connect one end of the VR to the pin marked on the pic and the other end to a ground point (e.g a screw/mounting hole)
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02-08-2005, 11:08 PM
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#12
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Xtreme Member
Join Date: May 2004
Location: Norway
Posts: 133
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Has anyone tried this mod, and does it work? If I do it. Should I just watch the voltage in bios while I turn the VR. Set it to max in bios, and then turn it until it shows 1.7v. That's the max I want to be able to give it. A bigger picture that shows me where to solder would be nice. The small picture is good, but I have no idea where on the mainboard it is.
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02-09-2005, 06:52 AM
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#13
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Moderator
Join Date: Jun 2002
Location: Denmark
Posts: 807
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Quote:
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Originally Posted by Kane
Has anyone tried this mod, and does it work? If I do it. Should I just watch the voltage in bios while I turn the VR. Set it to max in bios, and then turn it until it shows 1.7v. That's the max I want to be able to give it. A bigger picture that shows me where to solder would be nice. The small picture is good, but I have no idea where on the mainboard it is.
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It works! right to 1.85 volt. Then OVP shoots down.
Yes, set the VR on max 20 k ohm boot and use bios corevolt or software in windows to ajust.
The area on the small picture is close to the CPU
__________________
Best OC Regards
Tom Holck
Denmark
The Homeland of nVentiv and Asetek
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02-09-2005, 07:03 AM
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#14
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Xtreme Member
Join Date: May 2004
Location: Norway
Posts: 133
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Okay, Thanks Tom
I'm always nervous when vmodding
Will try this mod this weekend. Other then the low vcore, I really like this card. Will also (hopefully) get my second 6800Ultra this weekend. Looking forward to running some benchmarks
Last edited by Kane; 02-09-2005 at 07:06 AM.
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02-09-2005, 01:20 PM
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#15
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Xtreme Member
Join Date: Jan 2005
Location: NL
Posts: 121
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Quote:
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Originally Posted by Kane
Okay, Thanks Tom
I'm always nervous when vmodding
Will try this mod this weekend. Other then the low vcore, I really like this card. Will also (hopefully) get my second 6800Ultra this weekend. Looking forward to running some benchmarks |
Good! Please post pics! I'm probably even more nervous then you..
__________________
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt." -Rami Belson | Specs!
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02-10-2005, 02:19 AM
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#16
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Registered User
Join Date: Feb 2005
Posts: 32
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Hi ppl.. so I've done the mod! Don't have any pics as I don't have a digital camera. Unfortunatelly, it doesent seem to work 
Turning the 20k VR while in BIOS I get to around ONLY 2k and the OVP shuts down my PC - but I can't see any increase in voltage at all? Neither CPU-Z nor BIOS info screen show any increase in voltage.. Have I done something wrong?
Oh yes, be carefull when soldering - by mistake I unsoldered the C5
Well ppl, so can someone enlighten me what could be wrong? Other than that, the MB workx fine even after the solder job..
john
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02-10-2005, 05:38 AM
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#17
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Xtreme Member
Join Date: Jan 2005
Location: NL
Posts: 121
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Hmm that sucks.. I just got myself a 20k VR today...
Edit:
@JohnnySK: Perhaps it is not connected to a good ground point?
__________________
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt." -Rami Belson | Specs!
Last edited by A_X; 02-10-2005 at 07:17 AM.
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02-10-2005, 08:40 AM
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#18
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Registered User
Join Date: Feb 2005
Posts: 32
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Well the OVP does power-off the system so it must be doing something.. Any gurus can help??
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02-10-2005, 11:06 AM
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#19
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Xtreme Vmod mod
Join Date: Aug 2004
Location: Cornwall/Newcastle uni, UK
Posts: 1,251
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have you tried reading the voltage using a DMM? You could also check with a DMM if the point you solder to on C5 is connected to pin 9 on the chip.
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02-10-2005, 11:58 AM
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#20
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Registered User
Join Date: Feb 2005
Posts: 32
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Yup,it's connected to pin9..tried that after I soldered the whole thing. Where from should I read the actuall voltage? Could you post a pic plz?
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02-10-2005, 12:31 PM
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#21
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Xtreme Vmod mod
Join Date: Aug 2004
Location: Cornwall/Newcastle uni, UK
Posts: 1,251
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You should be able to get a reading from one of the inductor legs around the CPU socket. You could also try to get a reading from one of the MOSFETS, but the voltage might be slightly lower than the true Vcore. If your careful, you might be able to get a reading from pin 16 of the IC too.
TBH, after looking at suggested circuit diagrams in the datasheet for the voltage controller I'm a bit doubtful about the mod using pin9 (feedback) because it doesn't appear to be connected to the output voltage in any way. To me, Vsense (pin12) would be more logical to use becasue it is connected to the output voltage, but that might depend on cutting traces. It depends how closely the motherboard designers have followed the refence circuit diagram tho.
If it has been said that the mod works tho, I guess that it will work ok using the feedback pin.
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02-11-2005, 09:24 AM
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#22
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Xtreme Member
Join Date: Jan 2005
Location: NL
Posts: 121
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Got it to work yet?
__________________
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt." -Rami Belson | Specs!
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02-11-2005, 01:48 PM
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#23
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Registered User
Join Date: Sep 2002
Location: Germany
Posts: 97
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Just to clear things up...
Pin9 of the ISL6566 regulator is marked wrong in the pic above!
Here's the correct solder point and some shots of the finished mod.
__________________
DFI Lanparty Ultra-D - A64 3200+ - 6800NU - 2x512MB A-Data DDR566 - 2x160GB Hitachi S-ATA
Last edited by OneProdigy; 02-11-2005 at 03:35 PM.
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02-11-2005, 02:09 PM
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#24
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Registered User
Join Date: Sep 2002
Location: Germany
Posts: 97
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And by the way, here's the 3.3V rail vdimm-mod:
__________________
DFI Lanparty Ultra-D - A64 3200+ - 6800NU - 2x512MB A-Data DDR566 - 2x160GB Hitachi S-ATA
Last edited by OneProdigy; 02-11-2005 at 03:33 PM.
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02-12-2005, 07:56 AM
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#25
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Xtreme Member
Join Date: Jan 2005
Location: NL
Posts: 121
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Thanx buddy! 
__________________
It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt." -Rami Belson | Specs!
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