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post #61 of 281
Quote:
Originally Posted by PizzaMan View Post

Double post for mod pics biggrin.gif
Extra read point is for what I think is PLL.
photobucket-54321-1351654154787.jpg

WOW that looks 100% better than mine lol. Yours looks so perfect and professional and mine looks like a scrambled mess, oh well, as long as it works.

I'll try to get some pictures of it soon, probably after I get the POT's and soder them onto the wires I have ready for them.
     
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post #62 of 281
Thread Starter 
Quote:
Originally Posted by PizzaMan View Post

Extra read point is for what I think is PLL.
Ooo, I think you're right.

That other uP chip on the top left might be VDDQ for the mem also...
    
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post #63 of 281
Quote:
Originally Posted by just_nuke_em View Post

Ooo, I think you're right.
That other uP chip on the top left might be VDDQ for the mem also...

Possibly....... Just tried bumping vMEM and zero gains... Might need to mod this other one.....


EDIT: My eyes are reading UP0109....is that right?



Double edit: Small bump in vMEM does crap. Hope it does something cold with lots of V's..... Core scales like mad with voltage though. Did 915Mhz with 1.05v on stock cooler. 37C load temps.
    
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post #64 of 281
Allright so I got my trim POT's today. I have a 25turn 20K and a 25turn 50K, which should I use for memory and which for the core?

And when I turn it on the first time, should I have the pot's set at a certian point. I mean I dont want to turn on the card and have it fry itself.
Edited by EpicAMDGamer - 10/31/12 at 10:21am
     
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post #65 of 281
Thread Starter 
Quote:
Originally Posted by EpicAMDGamer View Post

Allright so I got my trim POT's today. I have a 25turn 20K and a 25turn 50K, which should I use for memory and which for the core?
And when I turn it on the first time, should I have the pot's set at a certian point. I mean I dont want to turn on the card and have it fry itself.
I'd use the 20k on the core, and the 50k on the mem.

For the pot, first determine how you want to turn it to change the voltage. Let's say you want to turn the pot cw for it to increase voltage. Therefore you want to start the pot in the ccw direction. Turn your pot ccw 25 turns or until it starts making little clicking noises (which means it is at the end). At this point, find the two legs that read the max resistance (make sure one of the legs is the middle one). From the middle to one leg should be ~0ohms and the middle to the other leg should be 20k or 50k (depending on which pot you are using). The pair of legs that meaures to the max are the two that you solder to. Thus when you put the pot in the circuit, the resistance is maxed and therefor will not affect the circuit drasticly.

Once you solder the pot in, do the same resistance measurement from the FB pin to ground. If the resistance is approximately the same (should be a little less), then your mod should not damage anything.
Edited by just_nuke_em - 10/31/12 at 10:59am
    
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post #66 of 281
Quote:
Originally Posted by just_nuke_em View Post

I'd use the 20k on the core, and the 50k on the mem.
For the pot, first determine how you want to turn it to change the voltage. Let's say you want to turn the pot cw for it to increase voltage. Therefore you want to start the pot in the ccw direction. Turn your pot ccw 25 turns or until it starts making little clicking noises (which means it is at the end). At this point, find the two legs that read the max resistance (make sure one of the legs is the middle one). From the middle to one leg should be ~0ohms and the middle to the other leg should be 20k or 50k (depending on which pot you are using). The pair of legs that meaures to the max are the two that you solder to. Thus when you put the pot in the circuit, the resistance is maxed and therefor will not affect the circuit drasticly.
Once you solder the pot in, do the same resistance measurement from the FB pin to ground. If the resistance is approximately the same (should be a little less), then your mod should not damage anything.

Uh oh. I was impatient so I tried to hook this up before you posted. I turned it on and I get .08 volts on the core and no video and no matter how I turn it it says at .08 volts.

EDIT: Removed the pot, it booted fine at .89 volts. Thank god.
     
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post #67 of 281
Quote:
Originally Posted by just_nuke_em View Post

I'd use the 20k on the core, and the 50k on the mem.
For the pot, first determine how you want to turn it to change the voltage. Let's say you want to turn the pot cw for it to increase voltage. Therefore you want to start the pot in the ccw direction. Turn your pot ccw 25 turns or until it starts making little clicking noises (which means it is at the end). At this point, find the two legs that read the max resistance (make sure one of the legs is the middle one). From the middle to one leg should be ~0ohms and the middle to the other leg should be 20k or 50k (depending on which pot you are using). The pair of legs that meaures to the max are the two that you solder to. Thus when you put the pot in the circuit, the resistance is maxed and therefor will not affect the circuit drasticly.
Once you solder the pot in, do the same resistance measurement from the FB pin to ground. If the resistance is approximately the same (should be a little less), then your mod should not damage anything.

Okay I did this and if I measure the resistance between the two wires going to the POT when the pot is attached and the DMM is set to the 20K scale it shows 0.89 on the display. Is this correct?

EDIT: okay so I'm booting with the vcore mod installed. Seems to be booting at about the same voltage as stock. I'm going to now turn the pot.
Edited by EpicAMDGamer - 10/31/12 at 11:37am
     
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post #68 of 281
For the pots, does it matter how many watts they are? my local radioshack only had .1 watt 10k pots. frown.gif
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post #69 of 281
Thread Starter 
No, wattage does not matter. Thses parts don't carry large currents.
    
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post #70 of 281
Quote:
Originally Posted by just_nuke_em View Post

No, wattage does not matter. Thses parts don't carry large currents.
Great.

And one more question before I get to work soldering...
why do we use 10k instead of 1k?

when I measure the resistance on the vrm on the card it reads as .712 k ohms. when I measure the resistance on the pot, it is showing 9.84 k ohms
Isnt that quite a difference?
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