Ok, reveived board and vga, took some pictures of the vga.
Warning, I left those pictures big so you can enlarge the specific part of the pic you need/want.

3850 front

3850 back

nice gear, enjoy the ride :D

About the ride, any details we should know?
Settings to use for Wprime etc.?

oneyedk zoom in on the front part at the back of it where the ic's are ;)

edit: also put it on xs becaus there it will go fast ;)

Errr... front part at the back of it? Errr...

at the back of the card, near the mounting bracket;)

you have to be able to understand Blindenese if you want to OC;)

^^
no no the front where u can see the core at the back of it where the 6pin pci-e molex go's in ;)

I don't thing that's a PWM-chip...

I think this is the vcore regulator, RT8802A:

if u say so :) , il take pics tonight ;).
who wll put these on xs ??

yep that's the one ;) ,and the smaller one could be the one to ;)

Nope, the other two are buffer and Mosfet driver (RT9619A)...
Still looking for the vmem regulator.

You can use these pictures to post on XS, I'll keep looking until I found that vmem-regulator.

invite XS over here;p

ik ken nieks van elentric daarom dak alles vraag :D

keep it in EN ;)
we're in the same boat; invite Geoffrey over:D

MSI HD3850 VMOD and go
 

here the vgpu mod should come.

vmem comming up .

thx for the help in advance to all u guy's

Post what voltages you read at the big coils, side closest to the GPU.

More pictures would help, and what text is on those chips?

btw, RT8802A is VID controlled :no: This is not good news...

/edit: different configuration on this card, so no VID-control, sorry...

why is that no good news?

Nice, a 100k variable resistor between pin 4 and ground should do the trick...

Will do the mod tomorrow, test it and post a picture of the mod.
Maybe we also have to remove the current protection :shrug:

hot solder iron ready give me pics :D

you go girl!


Young Girls learn how to make Vibro-Robot

:D :D

If it was VID-controlled, we had to modify 8-bits, you can't do that on the fly.

The pin 4 (feedback to ground resistor) mod can be adjusted on the fly.

It's the cooperation of both, no VID voltage setting without any feedback loop.


EDIT: bloody spam! this thread has grown quite a lot last few ours! :|

the vmod are authorized ??

Because i read on the rules for MSI European Contest for the France, the vmod are not authorized... :/

i would like know if is authorized...

Thank's...

RT88... for Memory
AT..... for GPU

Three big coils read GPU core voltage
smaller one next to it read memory voltage

post some voltage results just to be sure ;)

No way to check it, so I guess it is authorized, for Belgium at least :)

Any ideas on the vmem regulator. Could it be the RT8105, near the last Mosfets/coil ?

RT8105 sounds familiar, to be honnest.

ok ok thank's for news ;)

Can't seem to find a datasheet online...

Second round is still in hands of Madshrimps, so we are allowed to decide over vmods or not :) :D

ok thank's massman, it was just to know the right decision ;)

I'll vmod too ^^

You have find for the vdroop ??

Belgium rules set is cooler :) VOLTMOD/Extreme Cooling allowed :D

it's more fun ^^

Can i post on Overclex or i must post here ??

would appreciate if you jump in here to report on your progress :)

well no problem i post on the both...

One in french the other in english ^^

solder points plz :D looks like oneyedk knows his electrics :)

Attachment 1828
there we go :)

My Russian is not so good, but from what I understand, RT8105 should be the same as APW7065. For a higher output voltage (vmem), we need to lower the resistance from pin 6 (FeedBack) to ground. (already 780Ohm on my card).
A VR with a value of 10k or 20k to ground should do the trick.
Modding, testing, pictures tomorrow...