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How to Pencil Mod 5770 ?

post #1 of 9
Thread Starter 
Can anyone please tell me how to pencil mod 5770 ? Which resistors to shade ? I have sapphire 5770 at stock voltage 1.125. I tried Afterburner, Trixx, rivatuner. Change UnofficialOverclocking to 1. Nothing worked. Please tell how to pencil mod 5770 ?
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post #2 of 9
I remember this trick shown in CPU magazine.
I don't remember how long ago or what card they used - it was an ATI card,IIRC.

I think this is it:

http://imageshack.us/f/197/backfullv2.jpg/
Edited by The Radius Kid - 5/18/11 at 10:51am
post #3 of 9
Thread Starter 
Quote:
Originally Posted by The Radius Kid View Post
I remember this trick shown in CPU magazine.
I don't remember how long ago or what card they used - it was an ATI card,IIRC.

I think this is it:

http://imageshack.us/f/197/backfullv2.jpg/
This image shows Stock voltage as 1.55. my stock voltage is 1.125. Also my card has ELPIDA RAM Chips.
Edited by HafeezLuqman - 5/18/11 at 10:58am
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post #4 of 9
post #5 of 9


It's for a HD 5750, so it may or may not apply to your 5770. Check to see what regulator your card has.
 
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post #6 of 9
Quote:
Originally Posted by HafeezLuqman View Post
This image shows Stock voltage as 1.55. my stock voltage is 1.125. Also my card has ELPIDA RAM Chips.
My card also has ELPIDA Memory.

Is your voltage controller the APW7088 seen here?



Is this your exact model number?


Edited by xsever - 5/19/11 at 5:09am
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post #7 of 9
http://pdf1.alldatasheet.com/datashe...C/APW7088.html

GPUv mod = pin13 .. which is the top side all the way to the right in your picture.. 'brownish' resistor directly above should be pencil mod location. Please measure the stock resistance of that resistor and pencil down slowly for voltage increase.
post #8 of 9
Thread Starter 
This is my Card's image.
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post #9 of 9
APW7067 - FB = pin #2

Attachment 223976

APW7088 - FB = pin #13
*RT is temp controlled... so try to keep the GPU temps under 50c for best results once mod'd

Attachment 223977

Locate these pins on the IC and trace/tone them out to the nearest connected resistor. Measure ohms at the resistor to ground, and multiply the recorded value by 20. This new value = the VR size you need to complete the mod.

*pencil mods should work on both vMEM and GPUv for these IC's too... just be careful

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