vdd mod for NF7-S w/RadioShack parts

[texuspete00]

I want to vdd mod my NF7-S v1.2 as I am stuck at 198fsb. I bought this:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CTLG%5F010%5F003%5F006%5F003&product%5Fid=271%2D343

I could have sworn I saw someone use this thing here.

Still confused as to which two of the three posts on it to use. I know this may be a shot in the dark.

edit: Ok found a good post on this. Realize I have the wrong one and a 10k pot will mean a little turn->big difference. Will get a 1k. I believe the middle is ground, then use either end but that will dictate the turning direction. I will try to start near 780 ohm, then work my way down until i get 1.85v average from those two spots listed in the pencil mod floating around the net... Sound good?

Hey, I heard the vdd mod messes with agp voltage on the 8rda. I really cant be messing up my 9700np as I just got it. Think it would be safe? Should I toss the 8500 back in for a bit?

[bowman1964]

yea the same ones i use.i use the 2 post next to the screw.

and i have a epox and the abit.and i have no agp voltage problems at all with using a vdd mod.
you will be fine

[Dissolved]

is it better to use a 1k pot or 10k on the vdd?

[Ragnarok]

1K pot? wont work

will fried ur NB in an instant (remember this isnt a 8RDA+)

need 10K or 5K

[texuspete00]

I thought 10k would mean a little turn would change the resistance a ton. What resistance did you guys end up using?

Oh, and thanks for easing my mind on the AGP.

[Ragnarok]

use a trim pot like this

http://www.radioshack.com/searchsku.asp?find=271-343

the adjustment is pretty precise on that thing, u need to turn like 15 times to drop it from 10K to 0K..

[BrainStorm]

Originally posted by texuspete2k2
I thought 10k would mean a little turn would change the resistance a ton. What resistance did you guys end up using?

Oh, and thanks for easing my mind on the AGP.

On a multiturn pot like that, as mentioned, it takes 15 turns to go from one end of resistance to the other. So a little turn doesn't make that much of a difference. What you want to avoid are pots that are 10K ohms and single turn. There, a small turn would equate to a large resistance (and hence voltage) change.

I don't have the Abit board, so I'm not sure of the resistance to set it at.

[texuspete00]

Well, guys thanks for the help. I already had the 10k, so all i needed was the thumbs up. Well, this whole time that was keeping me from 200fsb. Not the ram, cpu, heat.... I guess I just didnt get that good of a v1.2. Actually one of the poor ones. I've got thermagic grease and a copper iceburg. Well, 208 was stable. I'm keeping it at 206 though. I measured the vdd pre mod and got 1.74 when set to 1.7 in bios, from what is known as "spot 2." Which is supposedly higher. I adjusted to about 1.9v... which I hope is more like 1.85v for my cooling. Mobo didnt want to boot for a bit after I touched spot 1.... don't really want to go back there. You guys get a little higher from spot 2?

Anyway, all i wanted out of this puppy was 200, no mods. Then when I had to mod I figured a bit over would be better. So 206~208, I'm satisfied. My first actual OC project. I had to lower my multiplier to 10 from 10.5.... Anyway, thanks a bunch guys. Here's to you guys and my watercooler coming in.... I want 10.5 back :toast:

[Ragnarok]

i did the mod tonite..

was real easy, had the trimmer @ 4.9 K and @ 1.4 in bios, it gave me around 1.65v vdd..

no need to mess around with trimmer, just change the setting in bios and watch it rise! :D

[Method Man]

I'm about to do the mod...can you see the vdd voltage rise with the bios monitoring or do you need to take the reading off the board???

[Dissolved]

Originally posted by Method Man
I'm about to do the mod...can you see the vdd voltage rise with the bios monitoring or do you need to take the reading off the board???

Yes.
if you set the vdd to to 5k you'll get this:
Bios: ~ vdd mod:
1.4v 1.55v
1.5v 1.6v
1.6v 1.84v

Thats all i went to. But that gives you an idea. if set to 4.9k on the pot, those mod voltages will be a bit higher then then mine.

[maphisto]

hi ,
i have th÷ NF7 rev 2 'does the pencil trick works on
my mobo as well ? :confused:
has any one tried it?
mine does 217 *9.5 with 1700+
and XMS3000C2 (2.75 V 3 3 6 2.5)

[Ragnarok]

why bother with the pencil? it's a hit and miss affair..

[texuspete00]

I heard it does work though... on the 2.0. The board is exactly the same but uses the crush18d northbridge AFAIK.

[maphisto]

Originally posted by Ragnarok
why bother with the pencil? it's a hit and miss affair..

ok , so can some please give a link to the other VDD mod ,
with the external resistor ?
tnks

[Ragnarok]

www.motherboardfaqs.com

in the abit mods section

[maphisto]

thanks

[Ragnarok]

u can just use a 5K fixed resistor

1.4 in bios will u around 1.65

[maphisto]

i did it (with the resistor)
its on 5k ohm but i cant reach the sopt to check the vdd with the multineter !
can any body tell me whats the value for about 1.85 or 1.9 v

[Ragnarok]

set in bios to 1.6 will get u around 1.85

[Marquzz]

What resistance will give me 2.9V for mem when set to 2.6 in bios?