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OCN's V'mod Squad's, Volt Mod Essentials! - Page 21

post #201 of 1500
Ok then,when my card is in 3d clocks full on(crysis)gpu gets 1.31v so i plan to take it to around 1.35 v whcih should give me roughly around 950-960mhz on gpu core,what should i lower my resistance to?
Is there a formula you can share with me please?
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post #202 of 1500
Thread Starter 
Ok, I'm gonna self quote myself from another thread. self quoting is sexy.

Quote:
Originally Posted by PizzaMan View Post
He can shade onto the resistor that Madmaxx soldered to. You want a high graphite drawing pencil. Off the top of my head I can't remember how they are modeled, but get a good drawing pencil and you should be good.

You will still want a DMM. Measure the currant resistance of the resistor on the board. Then you want to shade just a touch. Measure again. You don't want to change the resistance to much. Start off with small bumps. If you shade to much just rub your finger over the resistor to remove some of the graphite.

Basically, you can pencil just about any mod if you have a resistor as a mod point. Its just a little more risky then turning a nob on a potentiometer. Shade to much and you'll juice the GPU to certain doom.
    
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post #203 of 1500
I think theres a formula that takes into account previous voltage, previosu resistance and the current volt and restistance but I dont want to give you the wrong info, is it ohms law maybe?
post #204 of 1500
Thread Starter 
Quote:
Originally Posted by tha d0ctor View Post
I think theres a formula that takes into account previous voltage, previosu resistance and the current volt and restistance but I dont want to give you the wrong info, is it ohms law maybe?
Each IC will be different. Basically, each IC will have a different max voltage at zero resistance. So there's really no table to go by. Then you have the fact that each cards vdroop will be different. Just to many factors involved.
    
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post #205 of 1500
Ok,heres what i have done,lowered the resistance from 1.880 down to 1.786.
I have managed to boot machine up no probs and core is stable well beyond previous,thing is im not feeling good about it at the moment because i have not yet measured the gpu voltage as i dont know the points to take measurement from.
Do i use ac setting on meter right?
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post #206 of 1500
Quote:
Originally Posted by superj1977 View Post
Ok,heres what i have done,lowered the resistance from 1.880 down to 1.786.
I have managed to boot machine up no probs and core is stable well beyond previous,thing is im not feeling good about it at the moment because i have not yet measured the gpu voltage as i dont know the points to take measurement from.
Do i use ac setting on meter right?
Dont pencil anymore until you have located the Vmeasure points. you just need to set it to read V and it will give you the reading. The points will be on a cap. Post some pix of the card and we can direct you to possible points of measurement.
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post #207 of 1500



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post #208 of 1500
That top pic is the one we are going to need, if you could get a shot of it like your bottom pic I could try to point them out a littl better. I know youre tired of taking pix, Im sorry but I cant relly see the points to well on the top pic of the back of your card.
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post #209 of 1500
No mate im not sick of taking photos,im really suprised about how well this has gone.
I dont know if you know about the problem in the last few months with the alleged bad batch of xfx 4890s?

Lots of people have got cards that can hardly overclock and are quite annoyed as they bought a 4890 on the basis that the 4890 was a monster card with good overhead for overclocking.
Anyway lots of cards by different companys(not just xfx)released so called cheapo cards without voltera chips and people have bought a card they thought had the same capabilitys as orignal refrence design(like me)and got really pissed when they found out their card was not the same as the card they read about at launch.
I have bumped into quite a few people with cards the same as mine searching for pencil mods but not being able to find 1 anywhere,belive me i searched for weeks.
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post #210 of 1500


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Sammie Dvd rw Windows 7 64Bit HZ281HPB 1200p / HP IPS 1080p / Samsung Syncmas... Qpad MK80 (Blue switch), SteelSeries 7G (Cherry... 
PowerCaseMouseMouse Pad
HX1000 CM-Stacker 832 Flipped Naos 3200,G5,G400,G400s, G300, Kone+ Razor Destructor and Steelseries Qck 
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