9550 vmod request

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02-23-2006, 10:58 PM
cirthix

9550 vmod request-update:additional picture, chip identified

The one i have is on a low profile pcb, so i couldnt find any vmods for it.

here's pictures:
http://www.cryo-laboratory.com/uploa...rthix/back.JPG
http://www.cryo-laboratory.com/uploa...hix/front2.JPG
http://www.cryo-laboratory.com/uploa...rthix/vreg.JPG

and what i had to do to fix it:
http://www.cryo-laboratory.com/uploa...resoldered.JPG
yeah, i resoldered soldered that, i got it for free because it was corroded (that area of the ram and a few other areas)so bad it artifacted. acetone, alcohol, and even soapwater couldnt clean it off :woot:
02-24-2006, 03:46 AM
persivore

1 Attachment(s)

Can you tell me whats written on the chip I've circled please.
02-24-2006, 04:12 AM
cirthix

Quote:

Originally Posted by persivore

Can you tell me whats written on the chip I've circled please.

http://www.cryo-laboratory.com/uploa.../persivore.JPG
02-25-2006, 06:47 PM
cirthix

bump
02-26-2006, 02:32 AM
persivore

1 Attachment(s)

Can you check the resistance between the pin I've marked and ground please.
02-26-2006, 02:38 AM
cirthix

190ohms
02-26-2006, 02:59 AM
persivore

1 Attachment(s)

For the Vgpu mod, connect a 10k VR between the pin in the above post and ground. Decrease resistance to incease voltage.

For the Vdd mod, can you check the voltage at the point I've marked, and get a close up picture of the area please.
02-26-2006, 03:07 AM
cirthix

2.533v
vgpu mod soldered, i havent adjusted the pot yet.

where's the vgpu measure point?

http://www.cryo-laboratory.com/uploa...persivore2.JPG
02-26-2006, 04:44 AM
persivore

2 Attachment(s)

You should be able to read Vgpu on the legs of the inductor I've circled.

For the Vdd mod, can you check the voltages at the points I've marked. Keep the card at constant load when checking the voltages.
02-26-2006, 05:20 AM
cirthix

Quote:

Originally Posted by persivore

You should be able to read Vgpu on the legs of the inductor I've circled.

For the Vdd mod, can you check the voltages at the points I've marked. Keep the card at constant load when checking the voltages.

i get 4.8v from that measure point
02-26-2006, 05:23 AM
persivore

1 Attachment(s)

Try one of these points then :)
02-26-2006, 05:33 AM
cirthix

point on the left is 1.23v or so, vgpu. the point on the right is ground.

i got this card because it artifacted and it was free. i figured some extra voltage would make it work fine. the card seems to have just died. also, turning the pot didnt change vgpu, so it wasnt related to the mod.

ah well, soldering practice
03-06-2006, 02:49 AM
brandinb

hehe what a shame!

do some more practice change out the caps see if it awakens!
03-13-2006, 07:15 PM
bigval

Too bad, I wish I could spot possible vmods like that!