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post #151 of 332
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
Successful soldering today!

vGPU allows up to 1.5V and vMem allows up to 1.64V. I'm going to throw another resistor in there for the GPU. I want to be able to run at least 1.7V when this guy is cold.
Does your VR not tune to 0.00?

Adding more resistance will decrease voltage.
    
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post #152 of 332
Quote:
Originally Posted by PizzaMan View Post
Does your VR not tune to 0.00?

Adding more resistance will decrease voltage.
That doesn't make sense to me at all...

Before the resistor was added, the vGPU was 1.19. To gain the ability to raise the voltage, I added a resistor. Therefore, resistance = more voltage.

Please correct me where I'm wrong in thinking that.




Also, stupid MCW80 has to be modded to fit a 5450. It has the mounting holes on the bracket but once you put it on the block itself, the holes are about 50% blocked. I'll just have to take a file to it...
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post #153 of 332
Thread Starter 
Go to lowes/homedepot and get screws and nuts. Remove the screw that holds the block together/bracket on. put screws through block and card at the same time and tight the block to the card.

When you added the resistor tuned to it's max resistance, you actually lowered the resistance. Basically, you are adding a better connection to ground. If you have turned your VR to it's lowest resistance, which should be 0.00 or an open connection to ground, you have just dialed the IC to it's highest allowed voltage, which appears to be 1.5v. If you can do that and not hit OVP/OCP then you are doing good.
    
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post #154 of 332
Have we found a way around OVP/OCP yet?


EDIT:



The two half circles are the 5450 mounts. They're blocked by the base of the waterblock. The only way to change this is to file it down a bit.
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post #155 of 332
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post
Have we found a way around OVP/OCP yet?
If you are tuning to 1.5v and running smooth w/o the card tripping to a lower voltage or 0.00v, then there is no OCP/OVP to worry about.
    
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post #156 of 332
OCP mod is just to lift 'Phase' leg of IC.. this will = '0' resistance and set max OCP for circuit... shouldnt need it though..maybe if we start getting 1.4ghz+..speed might trip it with current draw..I doubt it though.

*Comp mod should net another +.03v and raise Ocs. Freq another 50mhz for a bit more current/voltage.. hard to trace visually on my PCB though..

Just finished vmeasures, 3x output caps and 2x input caps on the little 5450.. pencil mod on GPUv to 7.1k ..have not yet fired the GPU off to test though. Pics soon.
post #157 of 332
Dremel, ftw!

I just attached the waterblock.

Let's see if I can get 1200.
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post #158 of 332
Quote:
Originally Posted by xxbassplayerxx View Post
Have we found a way around OVP/OCP yet?


EDIT:



The two half circles are the 5450 mounts. They're blocked by the base of the waterblock. The only way to change this is to file it down a bit.
I turned the block sideways..and broke the legs off the mounting plate...like Pizza said..basically 'bolting the block together on the core'. *Same method I used for my 5770 in my sons rig..works on all 5xxx cores with MCW60/80.

**You can use 2x of the 4x bolts to bolt the block together on opposite corners and use the other 2x to secure it to the PCB
Edited by CL3P20 - 6/30/10 at 10:20pm
post #159 of 332
I still have no idea what you're saying. The good news is, the block is fastened securely to my card!
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post #160 of 332
BUMP! I was wrong about the voltage.

However, I think the chip wants to be cold. 1.55V and it still crashed at 1100. Don't think I'll be doing too well in this one, folks
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