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post #271 of 1498
Yeah it does look as if the 7074 is the GPU from the V readings and looking at the data sheet. measure the resistance between pin #5FB and pin #7ground on the 7074 so atleast we can at least get that out of the way.
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post #272 of 1498
Quote:
Originally Posted by Voltage_Drop View Post
Yeah it does look as if the 7074 is the GPU from the V readings and looking at the data sheet. measure the resistance between pin #5FB and pin #7ground on the 7074 so atleast we can at least get that out of the way.
Do I measure resistance the same way I measure voltage or ? What settings on the DMM

Edit: Also is there a way to measure voltage and such with the GPU off? I've been measuring with the comp on and its a tad difficult at times
post #273 of 1498
Quote:
Originally Posted by Martkilu View Post
Do I measure resistance the same way I measure voltage or ? What settings on the DMM

Edit: Also is there a way to measure voltage and such with the GPU off? I've been measuring with the comp on and its a tad difficult at times
To measure the resistance you have to have the card out of the PC and set your meter on the horseshoe symbol which represents ohms. And for measuring voltage, it has to be in the PC with the power on. I know it can be difficult sometimes and scary at the least. I would solder a molex connector to the Vmeasure point(positive red wire) and (negative black wire)to any ground, preferably the copper around the screw holes.
Edited by Voltage_Drop - 1/17/10 at 12:27pm
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post #274 of 1498
Thread Starter 
Can you take some closer shots of the two IC's?
    
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post #275 of 1498
Quote:
Originally Posted by Voltage_Drop View Post
To measure the resistance you have to have the card out of the PC and set your meter on the horseshoe symbol which represents ohms. And for measuring voltage, it has to be in the PC with the power on. I know it can be difficult sometimes and scary at the least. I would solder a molex connector to the Vmeasure point(positive red wire) and (negative black wire)to any ground, preferably the copper around the screw holes.
Be back soon with the resistance

Quote:
Originally Posted by PizzaMan View Post
Can you take some closer shots of the two IC's?
Sure thing man
post #276 of 1498
Wasn't sure what setting for the resistance sooo:
200k = .7
20k = .76
2k = 767

Here are the closer shots, tell me if you need better (still trying to figure out how to work my dad's camera)

post #277 of 1498
Quote:
Originally Posted by Martkilu View Post
Wasn't sure what setting for the resistance sooo:
200k = .7
20k = .76
2k = 767

Here are the closer shots, tell me if you need better (still trying to figure out how to work my dad's camera)

Okay that would make it 767 ohms * 20=15.34k. so a 20k VR will be adequate for that chip.
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post #278 of 1498
Quote:
Originally Posted by Voltage_Drop View Post
Okay that would make it 767 ohms * 20=15.34k. so a 20k VR will be adequate for that chip.
Where would I put the 20k (where would I solder it to? Pin 5?)
Also which of those read points is the vgpu and which is vmem?
post #279 of 1498
Quote:
Originally Posted by Martkilu View Post
Where would I put the 20k (where would I solder it to? Pin 5?)
Also which of those read points is the vgpu and which is vmem?
Yes, the positive to pin #5 and the negative to either pin#7 or you can pick a ground on the PCB such as the copper around a screw hole. I believe the Vgpu measure point is one of the readings that you marked as being 1.1V or the 1.13V. The only way to know for sure is to power up the card and see if one of those points rises under load, like when you run a game or ATITool or something. As for the mem I am not sure yet but I will look at the pix and try to point them out to you.
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post #280 of 1498
Quote:
Originally Posted by Voltage_Drop View Post
Yes, the positive to pin #5 and the negative to either pin#7 or you can pick a ground on the PCB such as the copper around a screw hole. I believe the Vgpu measure point is one of the readings that you marked as being 1.1V or the 1.13V. The only way to know for sure is to power up the card and see if one of those points rises under load, like when you run a game or ATITool or something. As for the mem I am not sure yet but I will look at the pix and try to point them out to you.
Alright sweet, I'll pick up a 20k pot tomorrow and get it on
I also got a lot of caps coming in so I'll put those on too and report back
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