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MSI GTX570 TFIII PE hardmod - Page 2

post #11 of 122
1/28/12 at 10:20am
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Is there actual difference between the two OCP mods?Btw pin 31=36.2kohm and pin 30=2kohm! I measured them with the card/computer off...
Edited by madness777 - 10/15/12 at 8:27am
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post #12 of 122
1/28/12 at 10:51am
Thread Starter 
img2212.jpg

They look so similar... just that C1086 and R935 (on my picture) are missing... Do you think they are the same? just short C1086 and R945
on your picture C1027 and R781
Sorry for bad pics, my camera is it giving all its got xD
Edited by madness777 - 10/15/12 at 8:29am
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post #13 of 122
1/28/12 at 2:55pm
Thread Starter 
I measured these:img2214-measured.jpg
They're 1kohm! are they FB? the other ones around aren't 1kohm! And I have a 50kohm VR at home... can I do Vmod with it? I'll just set it to 20kohm and solder it on there. btw how much voltage does 20kohm put into the core? and should I start with 0ohm or 20kohm? cuz when I was doing an 8800GT vmod it was set to 500ohm I think, im not sure xD
I'm getting a hang of modding again!
Edited by madness777 - 10/15/12 at 8:31am
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post #14 of 122
1/28/12 at 4:43pm
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Quote:
Originally Posted by madness777 View Post

Is there actual difference between the two OCP mods?Btw pin 31=36.2kohm and pin 30=2kohm! I measured them with the card/computer off...
l_measurements.jpg


36.2k ohms = stock Switching Frequency.. you can pencil to lower resistance [would not recommend going lower than 50% of stock value]

2k ohms = OCP mod point.. short for per channel OCP [*can test with pencil, as lowering resistance should have little to NO noticeable affect... before soldering short]

 

**per channel OCP is for disabling the slave controllers OCP limit. It still does not remove the overall current limit .. but is half of the OCP issue.

 



Quote:
Originally Posted by madness777 View Post

I measured these: l_img_2214measured.jpg
They're 1kohm! are they FB? the other ones around aren't 1kohm! And I have a 50kohm VR at home... can I do Vmod with it? I'll just set it to 20kohm and solder it on there. btw how much voltage does 20kohm put into the core? and should I start with 0ohm or 20kohm? cuz when I was doing an 8800GT vmod it was set to 500ohm I think, im not sure xD
I'm getting a hang of modding again!


**Your 'FB' should tone to the pin on the front side.. as well as ground. If it is connected to both ground and FB pin.. then you can use the point for GPUv mod.

 

 You calculate your VR size with the following : [R *20] = VR .. so stock resistance x 20 wink.gif

 

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post #15 of 122
1/29/12 at 12:45am
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Quote:
Originally Posted by CL3P20 View Post

**per channel OCP is for disabling the slave controllers OCP limit. It still does not remove the overall current limit .. but is half of the OCP issue.
So... can I do both OCP mods? on the front and back.
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post #16 of 122
1/29/12 at 12:53am
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and are these 2 for FULL ocp?
img2214-measured.jpg

Oh... and thanks for your help. thumb.gifbiggrin.gif
Edited by madness777 - 10/15/12 at 8:33am
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post #17 of 122
1/29/12 at 4:43am
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Quote:
Originally Posted by CL3P20 View Post



36.2k ohms = stock Switching Frequency.. you can pencil to lower resistance [would not recommend going lower than 50% of stock value]
Firstly:
What will this do if I lower the resistance? Is there any difference in performance or overclock?

Secondly:
What if I go lower than 50%? That means you don't recommend going under half of the stock resistance? (stock=36.2, so under 18.1 is dangerous?)
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post #18 of 122
1/29/12 at 8:35am
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I would try to trace the pins in question for 'Full OCP' to the front side.. and locate which pin they trace to..just to make sure that is what we are dealing with. **Yes you want to perform both mods as well.

 

 

switching freq - is the clipping rate of the mosfets.. increasing this, will increase transient response.. lowering droop. Effectively "speeding up" the output rate of the circuit. **I mention not to go below 50% of stock, as once you go too high with Switching Freq.. you loose the ability to output high current... which is required for high core speeds.

 

**Best results are just down from stock, around 20-40% of stock value.

 

Im not sure if this mod would be good for you yet.. as you have not completed OCP.


Edited by CL3P20 - 1/29/12 at 8:38am
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post #19 of 122
1/29/12 at 8:53am
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Quote:
Originally Posted by CL3P20 View Post

I would try to trace the pins in question for 'Full OCP' to the front side.. and locate which pin they trace to..just to make sure that is what we are dealing with. **Yes you want to perform both mods as well.
Which pin am I looking at here? pin 30? I'll check all of them and tell you later...
Quote:
Originally Posted by CL3P20 View Post

**Best results are just down from stock, around 20-40% of stock value.
So 21.7kohm-28.9kohm is best... I calculated HAHA!
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post #20 of 122
1/29/12 at 9:12am
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I'm pretty sure it's pin 2 for both points! Where does that lead me? What now?
Which pin is on your chip for FULL OCP?
Edited by madness777 - 10/15/12 at 8:35am
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