Palit 8400GS vmods Help - High res Pics Included

[hammad]

hi
i have searched allot and only this sort of resistor available this is iopen style and 20K


http://www.made-in-china.com/image/2f0j00iMmTtWBaHfqOM/Variable-Resistor-RM065C-V2-.jpg

http://www.made-in-china.com/image/2f0j00iMmTtWBaHfqOM/Variable-Resistor-RM065C-V2-.jpg

 

[mAlkAv]

This will probably work but could be a bit inaccurate in the end. Nevertheless its worth a try.

 

[hammad]

i have searched alot but not able to find that one

so now whats next plz

 

[mAlkAv]

Well, just solder a wire at Pin3 and at Pin6 and put the VR in the middle. Then you can raise Vgpu by reducing the resistance with the VR.

I will mark some measure points on your pics later, so you can check stock voltages before doing the actual vmod.

 

[hammad]

ok , understand what i have to do , can you plz tell me the measurements point of voltages that i can check what actually happening , that will be great help .

also plz tell me when i will check the volatges the card should be pluged in board and system should be in ON state , am i rite ?

 

[mAlkAv]

Yes for voltage reading the card must be plugged in, and your yes needs to be startet.

I guess those are the measure points. Values should be ~1.35V for GPU und ~1.9V for VRAM.

 

[hammad]

well for for VGPU

i am using those points , setting meter range to 20 Voltages and i am getting values (stock , with out variable applied )

-0.05

r u sure those are point .

when use the variable at full ( 20k) still getting the - 0.05

useing the variable at 15k getting - 0.07

so , r these values are OK ?


and what about the Vmem mod ?

thanks

 

[hammad]

finally I am able to found the measurements Points , those are the same as you said , i took 1 from them and the other i use ground and now it displays the Stock Voltages those are 1.31

i had tried it to adjust the range to 1.31 - 1.50 , with many test ,



there is not much difference i am getting from vmod , but there is difference ,

i got around 100mhz core and 150mhz shader , (more from stock over clocking)

ok , now can you plz tell me what for Vmem ?


thanx

 

[mAlkAv]

Seems as the Vgpu is not yet working rightly.

The Vmem is probably not that easy i guess.
I would need to have a closer look at those points:

 

[hammad]

should i tell you the Model number of these ic's ?

Thanks

 

[mAlkAv]

Yes please. A close up pic would be nice too.

BTW, the partnumber should look like this: 432A, 432L
http://pdf1.alldatasheet.com/datasheet-pdf/view/177665/DIODES/AP432A.html

 

[hammad]

btw

what you you think , vgu is not working rite because of extra shader and core but Low mem ?

thanks

 

[mAlkAv]

100MHz/150MHz improvement at all seems to be not enough for 1.5V. Or is this just the improvement by vmod without stock OC ?

 

[hammad]

ok here are the details .

Stock Clocks

460 Core
350 mem
918 Shader


on default Voltages (1.31) i can easly overclock it to

660 Core
460 mem
1320 shader

now with voltage 1.48

760 core
460 mem
1520 shader


1.48 + is always non stable or too much for my cooling Unit

 

[mAlkAv]

Ah ok, sound good to me then.
I could run my 8400GS with an ACS2 and 1.85V without Temp issues btw

 

[hammad]

what cores shader and mem you get on those voltages ?

 

[mAlkAv]

About 830/2100, but my model is not a very good one. With stock voltages it can't even hit 600MHz on the core. So not a bad improvement.
I bet yours would run benchies with 900/2200 at 1.8V+

 

[hammad]

ooooooooooooooooops

really it can do ?

ok , i will post the IC Number soon ,

 

[hammad]

highlited part is

431L

all other are other type or parts name , if you want there names , let me know i will write those tooo

 

[hammad]

one of my friend borrowed my Digital Cam so i dont have that at right now
the following picture is from n73 camera