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General GeForce 210 vmod thread - Page 8

post #71 of 281
Thread Starter 
You want the big difference. A large resistance in parallel with a small resistance does not change the overall resistance of the circuit very much. You want the significant change to happen when you turn the pot, not after you solder it it. To understand why this is, let's look at the theory behind parallel resistance.

Parallel resistence is calculated as R3 = 1 / (1/R1 + 1/R2 ). In our case R1 will be the orignal resistance measured, R2 will be the resistance added by the pot, and R3 is the new resistance. If you go through and put some values in for R1 and R2, you will find that R3 will be closer to the lower of R1 and R2. Example: R1=10ohm, R2=200ohm, R3 will then be 9.5ohm. So we see that large resistance in parallel with small resistance is very similar to the small resistance. Now if R2 =50ohm, R3 goes down to 8.33ohm. In general if R2 is x20 R1, then it does not drasticaly affect the circuit.

For your case, you measure R1=0.712k. If you use R2=1k then your new resistance is R3=416ohm, which is a very large drop in resistance (for this kind of circuit). That kind of drop might add .5v to the core, which is a lot. By using a 10k, R3 is only 665ohm, which is not as drastic and might add only .1 or .05v to the core.
    
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post #72 of 281
I got the Gigabyte GV-N210D3-1GI rev 3, it has 2 uP1504T and 1 uP0104P. Any idea which lead I should check? I goggled the part and got nothing.
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post #73 of 281
Thread Starter 
I can't find any datasheets for those parts, but the uP1504 chips are the controllers. I can help you do a blind mod though. Pick one of the controllers and measure the resistance from every pin to ground, and report back the values here.
Edited by just_nuke_em - 11/1/12 at 11:01am
    
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post #74 of 281
^^^^ and pics help to biggrin.gif
    
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post #75 of 281
Will do I was trying it out without the mods. I put my cooler from my 9800 on it, it looks ridiculous. The cooler is an easy 3x the surface area of the card. I zip tied 2 92mm Deltas to it that are with 160cfm, should be enough cooling lol.

This is the cooler: http://www.scythe-usa.com/product/vga/002/scvms1000_detail.html

Fits on my 210 like a glove.
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post #76 of 281
All I have to say is this card is trash now.... Zero results....


photobucket-6396-1351750868502.jpg
    
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post #77 of 281
Dead? First casualty of the contest?
    
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post #78 of 281
Quote:
Originally Posted by Rasparthe View Post

Dead? First casualty of the contest?

Not completely dead, but degraded to the point that it will not handle 3d at stock anymore.
    
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post #79 of 281

chipped core?

 

or just "finding out" how it does/doesnt scale with 300% voltage increase?

post #80 of 281
Quote:
Originally Posted by CL3P20 View Post

chipped core?

or just "finding out" how it does/doesnt scale with 300% voltage increase?


IDK what happened. I know I had a bad mount first freeze attempted. Only tried 1.25v on the core. Couldn't get it to do anything. First I thought it was hating the cold or I had water in the slot already. Tore it down and noticed the tim was squished real bad to one side and the die had pour contact. Removed everything and put the stock cooler on. Card continued to act the same with stock clocks and cooler. frown.gif
    
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