6600GT voltmod using a PENCIL :)

jancz3rt

jancz3rt

<b>VIP Member</b>
Ok guys, time has come for me to experiment with my 6600GT. I have done some NIBITOR tweaking and now my card has a 3D frequency of 560/590 (1180 DDR) set in the BIOS so I no longer need to use Rivatuner to keep my card OC'd. My next goal is Vmodding the card. It requires either a pencil mod or a VR (variable resistor) mod. I am leaning towards the pencil mod. However, how would I go about doing it? I have guides telling me that I should use a pencil mod, but none telling me how to.

So...how does one do a PENCIL MOD?

- http://www.overclock.net/graphics-cards-volt-mods/62092-msi-nx6600gt-td128e-vcore-mod.html

JAN :D
 
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Eh?

meanman said:
what the fu? did you just fu? say i think i have gone blind
Click to expand...

Eh? Man I do not understand what you are talking about! Please do not post if you have nothing useful to say regarding what I asked.

JAN :D
 
I can't give you a step by step as I have not done a pencil mod on that vid card. But I can give ou a general idea I think.

I volt modded motherboards before with graphite/pencil.

You want to find the proper resistor that needs to be adjusted. Check the ohms at default to get an idea of what you are workign with. Then apply graphite to the resistor to oncrease ohms/reisitence. The more resistance you add, the more voltage the card applies, which is how you get the extra volts.

As far as longevity, you might want to tape off the graphite after you get it set right so it doesn't blow off with fans and dust and all. You can completely remove it with isopropyl alcohol.
 
Thanx

Thanx 4W4K3 ;)

Here's the resistor in question (488 Ohms resistance @ default):

mod-b.jpg


What I was more interested in is where you apply the lead from the pencil? Would it be from the two sides and over where the number is on the resistor or would it be around the resistor and to the two sides?

JAN :D
 
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if you have a modded bios why not change the voltages that are fed to the card in the bios instead of performing an external modification?
 
Well you can't adjust the voltage from BIOS, even modded ones. there is a "AGP Voltage" option but that does not adjust the right voltage, that's more for older cards.

You want to apply the graphite to the silver/metal sides of the resistor. Not the black plastic part. You can try using the top for easy removal, but it will un-doubtedly fall along the sides/crevice as well. And don't circle all the way around it, just use the left and right silver edges.

There should be some part of the card where you can test the voltage (not ohms) and make sure you have the correct amount. You can check both with a multimeter. But when checking ohms make SURE the card is off, unless you want sparks (I did this). Voltage can be checked with the card on like most any other electronic, but you don't read it from the resistor. You'll have to find out where you can read it, as it's specific to the card.
 
hehe...

That's what I used as a guide to the idea guys. So, just to make sure before I do anything stupid, I connect the left silver part with the right silver part by using the pencil to connect the two along the length of the resistor?

JAN :D
 
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Well technically they are already connected, it's one resistor from what I can tell. But yes, apply the graphite on both sides, it won't matter if the line you draw connects them. When i penciled my motherboard I practically covered the thing because I was looking for alot of voltage. Just make sure none of it blows away onto other parts of the card...
 
Update

Just test Vmodded and got a bit higher than I could before. The GPU Vcore is @ 1.5 vs. 1.4 in high power 3D mode :) This was just a test and shows that even small voltage improvements in Vcore get me further.

Now : 580/605 - stable
Previously 560/590 - stable
Stock: 400/450 (below GT standard clock)

Now this is just a 0.1 increase in voltage. Wait what +.2 can do :)

I want to achieve a 600+ OC on the core and keep my mem @ 1210 as the core really does the wonders in terms of speed....and I would rather not vmod the mem as well :)

My ultimate goal: Get 650+ core @ 1.7V

JAN :D
 
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Ok update...

Upped the VGPU voltage to 1.5 in 3D Mode but that did not lead to more than 5 Mhz extra. I still want to try 1.6V minimum and see whether that takes me beyond 600 (which it should). In fact, based on what I read 1.7V should be able to get me past 650Mhz on the CORE.

JAN :D
 
hey jan... whats the boost in speed done for your performance, i'm looking at doing this now ive seen your success in this little project :D
 
I've been thinking about doing it to my 7800GT, but it clocks so badly I'm not sure its worth it, especialy cause I cant replace it.
 
Heya

Hairy_Lee said:
hey jan... whats the boost in speed done for your performance, i'm looking at doing this now ive seen your success in this little project :D
Click to expand...

Well I have decided to abandon this project. @ 1.5V, I got 580/1210 stable. However, I decided that it was not worth the extra 200 3D Mark points it gained me (03) and reverted back to my previous clock (560/1200). I have 9600 points anyway, so the mod would not bring me much more.

JAN :D
 
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