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Well I can confirm that my mod does nothing to help my NB voltage. The mosfet between the LM and the APG always reads 1.458v. The leg of my pot connected to pin 8 reads 12v and the leg connected to pin 5 reads the same 1.458 that the mosfet reads. Are the IS7 and the IC7 that different?
You're rightQuote:
Originally posted by Shadrag
There is a mosfet between the LM chip and the agp slot, measuring a leg and ground gives me 1.45-ish v, which seems to be the correct amount...
I could really use some help because right now I've got nothing. Does anyone have anything to say about the IS7? If anyone knows how to mod it, that would be great.
Hey Catch
I'll try to mod my AGP voltage with LM pin6 to ground with 50k VR. As I said before raising pin 5 was no go so 'll try to lower pin 6...
Wish me luck :)
Szymek - did you get around to trying that on your agp voltage? If so, did it work?
Yup. Tried to 'fool' AGP voltage regulator by increasing +IN voltage. Also tried to lower -IN and it was no-go.Quote:
Originally posted by Shadrag
Szymek - did you get around to trying that on your agp voltage? If so, did it work?
Catch are you still here ? I was using 50k VR. Maybe it was too high ? Got as low as 20k ish and noticed NO change in voltage at all (not even .001 change)
I think i was confused earlier. Do so many mods i can't keep track. I ended up doing it similar to the original posters direction.
I cut the trace
Solder from cut trace winbond side
soldered from agp mosfet
soldered a ground as well
used a 2k ohm variable resistor
middle leg of vario to trace
left leg to mosfet
right leg to ground
set resistance between left leg and middle pin at 100 ohms to start. Haven't actually tried it yet. I'm hoping this mobo still runs. I was having issues before the mod
Also i think the v north mod the way i've been doing it sucksass. I may have to try another method. I'll post results etc.
Let us know if you find anything, I'm anxious to find a way to vmod the northbridge on my IS7.
From reading the vdimm thread this mod works. I assume I could raise pin 34 on the winbond chip instead of cutting the trace and sodering to it. I know I cant soder to a trace. The pin sounds like a good soder point. As long as the pin doesnt break. Hot glue a wire to the winbond chip raise pin 34 dab of soder? I really want to make sure that pin 34 is correct. My multi is too fat for all that little stuff.Quote:
Originally posted by CATCH22ATPLAY
I think i was confused earlier. Do so many mods i can't keep track. I ended up doing it similar to the original posters direction.
I cut the trace
Solder from cut trace winbond side
soldered from agp mosfet
soldered a ground as well
used a 2k ohm variable resistor
middle leg of vario to trace
left leg to mosfet
right leg to ground
set resistance between left leg and middle pin at 100 ohms to start. Haven't actually tried it yet. I'm hoping this mobo still runs. I was having issues before the mod
Also i think the v north mod the way i've been doing it sucksass. I may have to try another method. I'll post results etc.
If you're not sure just Ohm between mosfet and this pin. Must read 0 resistance (short circuit)Quote:
Originally posted by wolfgang
From reading the vdimm thread this mod works. I assume I could raise pin 34 on the winbond chip instead of cutting the trace and sodering to it. I know I cant soder to a trace. The pin sounds like a good soder point. As long as the pin doesnt break. Hot glue a wire to the winbond chip raise pin 34 dab of soder? I really want to make sure that pin 34 is correct. My multi is too fat for all that little stuff.
Of course If you're able to lift pin 34 feel free to do that... I 've cut the trace and soldered to it !
Malves said in another thread that he got vnorth adjustment on an IS7 by using a 1k pot between pin 6(not cut) and the FET leg. An thoughts on how good this method might be?
I should post and say it works lifting the pin. It just seems easier to me that way and there is no damage to the board.
Really? Malves tried lifting the pin first and got no results. I have tried this method on my IS7 and have gotten some results, but it seems that increasing resistance gives me higher voltage so 1K is not nearly enough. You would need around 10K to have a decent voltage change assuming the voltage change is constant.
How much resistance did you have between ground and pin? Mine is pin to mosfit ~85ohms and pin to ground ~1900 ohms. That seems to be enough I get about .03 over bios setting. Had it up to 1.85 be carefull with high agp.
Hm well I was only using a 1k and that only showed too low an increase. stock at 1.456v then with 1K at 1.467v then I lowered all the way to about 300 and got 1.461. Just today I tried with a bigger pot at 10K it was still only 1.467, however I disconnected the mod and then got 1.473! This is very wierd, I am sure of what my voltag was before the mod, I measured it 3 seperate times and got 1.456-1.458 every time.
wolfgang - what fsb increase have you gotten with the voltmod, before and after?
Well i finally managed 333fsb. AGP mod helped. I used Vnorth mod but i still don't think that helped. I ended up removing the v north mod. I did however end up doing if differently. I used pin 2 to my 5v line via a 500K ohm vario set at 500K. That did end up being a better method. But like i said it really didn't seem to help. But if yours is low like that 1.456 i'd do the mod my way and give it at least 1.50 which Intel says it should be. Mine without mods on this mobo is like 1.510 My old ic7 default was 1.479 and at the time i thought raising the Vnorth did help on that mobo. I think the best thing to do though and something i will do shortly is just adding another capacitor for Vnorth that's rated the same as the existing one. I've done that to a lot of mobos in the past. Doesn't help a lot but a few fsb morre o/c is worth it 2 me.
Great! Thanks Catch, I'll try going from pin 2 to 5v then since nothing else has worked. Now I just have to wait until I have enough free time to take her apart again.
Oh well, time for a new board. I don't know if the mod worked or not Catch....
It was all connected fine and I turned the pot from 500k lower and nothing was happening then all of the sudden I heard a sizzle noise and saw the pot start glowing... I pulled the wires off, but the voltmeter was rising drastically and I saw it go over 1.9 before the wire I was using to read the voltage melted off the voltage regulator... My board is dead... well the only bad part is the NB voltage reg, it's a little melted, the NB doesn't appear any worse though.
SO I'm thinking of getting an AI7 or a IC7, leaning towards AI7, any recommendations?
What 5v source did you use? ATX plug? Thanks :)Quote:
Originally posted by CATCH22ATPLAY
Well i finally managed 333fsb. AGP mod helped. I used Vnorth mod but i still don't think that helped. I ended up removing the v north mod. I did however end up doing if differently. I used pin 2 to my 5v line via a 500K ohm vario set at 500K. That did end up being a better method. But like i said it really didn't seem to help. But if yours is low like that 1.456 i'd do the mod my way and give it at least 1.50 which Intel says it should be. Mine without mods on this mobo is like 1.510 My old ic7 default was 1.479 and at the time i thought raising the Vnorth did help on that mobo. I think the best thing to do though and something i will do shortly is just adding another capacitor for Vnorth that's rated the same as the existing one. I've done that to a lot of mobos in the past. Doesn't help a lot but a few fsb morre o/c is worth it 2 me.
I was planning on soldering to something on the motherboard, probably the ATX connector, but just for the initial testing I was using the 5v from a molex connector.
BTW hipro5 just posted a great mod article on the IC7 at http://www.thelab.gr/reviews/ic7mods_en1.php enjoy, makes me wish I had an IC7...
Damn dude i've done the v north mod on 3 different ic7 mobos. 1 was a max3. I've even tried using 12v for my source without problems. Curious what type of vario you used. Sometimes if you want to be safe add a 10 ohm 1.8th or 1/4 watt resistor to whatever vario you use. That way only 1/4 of a watt goes to whatever pin you're landing on and you won't fry sheit. pin 1 is bottom left pin and pin 2 is bottom second from left. Like thisQuote:
Originally posted by Shadrag
I was planning on soldering to something on the motherboard, probably the ATX connector, but just for the initial testing I was using the 5v from a molex connector.
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ok now that would make how many products i've fried of other peoples stuff? hmm let's call it 101 :eek: