8800GT voltage mods

[XSS]

i will the Card give more Vcore an Vmem

[e-danek]

Hey!
Sry but i don't understand electronics too much.
What will be the vgpu if i would pencil the horizontal resistor under the power chip (this with vsense)?

What would do connecting these 2 points?
Greetz

[largon]

e-danek,
Do not pencil that. Besides, that horizontal SMD is not a resistor.
And btw, the blue "GND" in your pic is not ground (GND).

[lowfat]

Moving the jumpers on my Galaxy GT sure helped. Went from 710 max core to 756

And AFAIK, the fan issue is now on every single Galaxy card with the new coolers. Rev2. & Rev3. Only way to fix issue is to flash the card.

[e-danek]

So what should i do?

Is this the right method for mod?
http://www.altron.com.pl/cgibin/shop...2&sid=24b84f5a Is this good VR?

[largon]

e-danek,
You might find an answer if you would read atleast the first post in this very thread.
You know, there's a reason why this thread is called "8800GT voltage mods".


edit:
Anyways, that pic does show one of the correct methods.

[e-danek]

Oh thx for help But is there another point to solder than this under chip? It's very small so it's easy to do some mistakes.
EDIT: Oh i see 3 another points to solder in your 1st post. Can i solder them together?

[largon]

Yes you can bridge them with solder to make one big solder point.

[e-danek]

OK, BIG thanks for help

[Luka_Aveiro]

Does the reference design 8800GT jumper have something to do with any vGPU increasing???

Could anyone please answer this? Even if it's a no answer, i'd like to know it for sure.

[largon]

I'd be grateful if someone with a DMM that can measure capacitance would measure the value of this surface mount capacitor (no desoldering needed for the measuring):

[ziddey]

[largon]

ziddey,
Huh?

[largon]

It seems 1.68v was too much for this unlucky mosfet on my card.

[ziddey]

wow, mosfet went before the core fried. nice

[largon]

Too bad the fet's part number is next to impossible to trace.
Have no idea even who makes those things.

[STEvil]

largon - modding my GTS right now, dont think my DMM supports measuring capacitance

I get 27.75 ohms across it though..

edit

going to see if I can find my other DMM's.. maybe one of them can.

edit

none I have can measure capacitance, sorry

[Pacha]

Yes you can bridge them with solder to make one big solder point.

excuse my ignorance on this but is it possible to bridge only two? or maybe all the four points (no problem with the big solder drop on the pcb here?) ?

[jason4207]

excuse my ignorance on this but is it possible to bridge only two? or maybe all the four points (no problem with the big solder drop on the pcb here?) ?

Yes you can. Technically, the points are already bridged.

[Timbosan]

It seems 1.68v was too much for this unlucky mosfet on my card.

wow i was waiting for someone to post this happening. I was sure removing the resistors for the 'dodgey OCP' mod (which also disables phase current sharing if done this way hint hint) would result in someone burning a fet, and here it is. Too bad mate. Maybe next card do the mod the right way and it might live & also be able to give the card 1.68v

EDIT - if you dont know what i mean, the 'correct' way to do the OCP mod is as Viper John posted, same principle as the G80 GTS OCP mod i posted. Removing the resistors is a good way to risk burning your cards.

[natedog420]

i dont remember were i found this pic if it was in this thread or not. i saved it cuz it was said to be the 8800gt gpu pencil mod. but i just looked at my card real quick and cant seem to find that area. i have a lot of heatsinks all over my card so cant see a lot. was wondering if anybody can see this or not. i am a little buzzed right now lol.

[STEvil]

That looks like a specified PCB.. or maybe 6x or 7x series card?

[natedog420]

i know it doesnt look like mine. but if you right click and save pic its 8800gtgpu. thats the name i saved it as cuz thats wut the mod was. so i guess were i got this pic from is wrong.

[leoftw]

Too bad the fet's part number is next to impossible to trace.
Have no idea even who makes those things.

I have a broken fx3500 at home it compares to a 7900GS , I'll check if the mosfets are the same . If they are you can have it . Hopefully they are.

[largon]

leoftw,
You are too kind.
Unfortunately it appears 7900GS has different type of mosfets onboard... [edit: On a closer look, the fets on 7900GS/FX3500 do appear to compatible with those on 8800GT, and on top of that, they are rated for higher output currents]
But infact, I've already made some inquiries and it turned out that it is possible that I would receive replacement parts during this week already.