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ECS 8400 512mb low profile vmod

post #1 of 58
Thread Starter 
kinder bad pics. but yeah

9400gt didnt go as planned, got this card for $15 AUD.
and well its turn now, i wanna get 1 successful vmod haha




what pics u guys need? ( areas )

thanks in advance and hope this one goes better then 9400gt lol


EDIT: btw done bit of ocing on this little thing with stock cooler + fan, max i could get
Stable 800core
424mem
1800 shader. ( furmark for 3 and half hours )

i was going for a stable oc, waiting on another board ( in 2 or 3 days ) so i can play some more and push it to its limit lol

i tryed 825mhz core, but couldnt get it stable, only got a furmark bench, and it was starting to artifact lol.
Edited by Liighthead - 3/23/11 at 5:29am
    
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post #2 of 58
Thread Starter 
been having a look around, but i can only find a pcb that looks like
http://img57.imageshack.us/i/crop1px3gg0mk6.jpg/

which isnt quite the same :/
    
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post #3 of 58
well first word of advice dont run furmark for that long. lemme check on your card
    
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post #4 of 58
see the ic on the back of the card? measure the resistance on the third pin down on the right side to ground. THen multiply that value by twenty (I beleave) and that is the value of your vr. Make sure to find vmeasure too, so you can check voltage before and after mod.
Edited by reggiesanchez - 3/22/11 at 9:58pm
    
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post #5 of 58
Thread Starter 
This one?


if so. this pin?



also why not run furmark that long? :S
temps were about 50 ( without the fan would go above 90 lol )


EDIT: got 0.86 @ 20k and 864 @ 2000. for resistance..
cant check vcore ect cause dont have a board, and wont be able to get the DMM in my case properly to close together.
getting a board 2morro ( 99% chance lol ) be able to check then.

btw 864 x 20 = 17280. so would it be like 17/18k VR? got 2 50ks sitting here lol.. which would i need? or you need me to check volts ect before know? cause i gotta order them in >.<


Edited by Liighthead - 3/23/11 at 12:20am
    
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post #6 of 58
That's the right pin.

Multiplying the resistance by 20 or 30 is just a rule of thumb. A 50k VR will work for you too.

For exact calculation I refer to a post of mine:
http://www.overclock.net/11985620-post20.html
Edited by mAlkAv!An - 3/23/11 at 1:17am
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post #7 of 58
Thread Starter 
ok thanks also bookmarked the link

any idea where the vcore and vmem be measured from? or just have to try? :/
    
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post #8 of 58
Look out for the electrolytic caps on the front, some of them will be rated for 6.3V or less - those will be for GPU or MEM voltage. At the backside you can measure voltages at the capacitors legs - one will be ground(0V) and the other one will be vGPU or vMEM. Ground side is always marked with a stripe on the cap itself.
All caps with ratings above 12V - usually 16V - are you used for the 12V input voltage comming from the PCI-E slot/power plug.
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post #9 of 58
Thread Starter 
Quote:
Originally Posted by mAlkAv!An View Post
Look out for the electrolytic caps on the front, some of them will be rated for 6.3V or less - those will be for GPU or MEM voltage. At the backside you can measure voltages at the capacitors legs - one will be ground(0V) and the other one will be vGPU or vMEM. Ground side is always marked with a stripe on the cap itself.
All caps with ratings above 12V - usually 16V - are you used for the 12V input voltage comming from the PCI-E slot/power plug.
thanks

so which is for the vcore? <- re read it lol
also does it matter which cap you mesure from? theres 3 x 6.3v green caps and 1 black 6.3v ( bigger then the others on the card )
and 2 x 16v caps.


Take 2: lol so how do you know which cap is which?
guessing the vcore cap be neer the vcore ic? same for the mem. does it matter which cap mesure from?


Edited by Liighthead - 3/23/11 at 1:58am
    
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post #10 of 58
Thread Starter 
problem: all 4 caps are around the same area lol.

2 green, 2 black. idear which is which? how to tell?
    
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