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MSI GTX570 TFIII PE hardmod

post #1 of 122
1/21/12 at 8:39am
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Does anyone know how to mod it? I would like to remove OCP. And when the card reaches full load like in OCCT or furmark the framerate jumps up and down and reduces the load, I would like to remove that too. It's all on this chip:
http://www.techpowerup.com/reviews/MSI/GTX_560_Ti_448_Cores_Twin_Frozr_III/images/vreg.jpg
But I don't know which pins/resistors are the ones doin that!
Help is appreciated!
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post #2 of 122
1/26/12 at 2:57pm
Google the datasheet, then read it. It's SUPER easy.
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post #3 of 122
1/27/12 at 8:36am
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I googled every possible thing I could, but there is nothing about this chip. Do you find anything?
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post #4 of 122
1/27/12 at 12:52pm
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First:

 

Confirm you have this control IC near the end of teh PCB and PCI-E connections-

 

vreg.jpg

 

If it is.. follow this example or any other you may find for MSI 6950 TFIII mods

 

P1070751.JPG

 

 Please follow this link for more information, better pics and results -> http://www.overclock.net/t/1009397/msi-6950-tfiii-pe-oc-testing-w-cl3p20/0_40#post_13417643

 

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post #5 of 122
1/27/12 at 1:26pm
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I found that link before but that chip is uP6218 and mine is uP1981A, they're not the same... so that 6950 mod is no help to me...
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post #6 of 122
1/27/12 at 1:52pm
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please post me some pics of the IC and surrounding area.. i will see what i can find out.

 

**From what i am seeing.. the mod is the same so far.. the different revision is just a newer packaging skew.. no real changes to the pinout from what i can see.. but post your pics for me any way please and i will confirm.

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post #7 of 122
1/28/12 at 3:41am
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http://i2.sqi.sh/s_3/cUc/l_img_2202.jpg
http://i2.sqi.sh/s_3/cUc/l_img_2187.jpg
http://i2.sqi.sh/s_3/cUc/l_img_2191.jpg
http://i2.sqi.sh/s_3/cUc/l_img_2192.jpg
http://i2.sqi.sh/s_3/cUc/l_img_2186.jpg
http://i2.sqi.sh/s_3/cUc/l_img_2184.jpg
I have a ****ty camera... but my friend is gonna come over to take some macro pictures of it so... if you can work out something from this, you're amazing! =D
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post #8 of 122
1/28/12 at 8:02am
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If you have a digital multi meter and pencil.. you can test the mod..

 

Capture.JPG

 

 The pin-out looks to be the same [at least for the half of the IC we need to be concerned with] .. pin32 should be OCP.. same as the 6950 TFIII mod. RF Swtiching Freq mod is the yellow pin.. FB pin, # 8 is for GPUv

 

**If you have a DMM you can measure resistance at these pins and post for me please?

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post #9 of 122
1/28/12 at 9:33am
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It's weird! those marked pins are 31 and 30! which pins are the correct ones? those marked or those written? I didn't measure them cuz im not sure and they're so tiny my head started hurting measuring FB xD
And I measured FB and it's 2.3kohm my idle volts are 1.024v and load volts are 1.212v (edited the bios for more volts)
Edited by madness777 - 10/15/12 at 8:26am
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post #10 of 122
1/28/12 at 9:57am
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physical layout is the same.. sorry it looks like i may have counted wrong and got 1x off redface.gif.. the pics show the correct pins marked for mod though.

 

 

**This is "per channel OCP"

vgpuocp2_6905_pe3.png

 

 

**This is "total OCP"

vgpuocp_6905_pe3.png

This pic is on the backside of PCB.. the layout may different, you will have to trace this to the pins on the front side..I would start with the per channel mod first..and test for results.

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