Help with vmod for gigabyte hd4850

[shar00750]

Hi , i have this card for bench but i need volt mod , the max volt i get is 1.158v .

tried to edit with rbe but it stay the same. the max i can get was 725mhz on air. tried on dice and it was the same - 725mhz.

I have seen very high results with this card, but I could not find specific information about it.

this is the card :

 

https://lh3.googleusercontent.com/-AJSMkdjABxM/VyRuw-B-zbI/AAAAAAAAEXc/HRY59rdobQQ2v7S6olgdtoBcSNsqKOd-gCCo/s800/4850.jpg

[basco]

did you try gamerhud from gigabyte:

http://www.gigabyte.at/MicroSite/40/tech_20080718_gamerhud.htm

and i looked up but could not find info on volt chip? can you tell us?

[shar00750]

Thank you very much, I'll try.

this is the mod i have sew : http://hwbot.org/submission/2336649_macsbeach98_3dmark_vantage___performance_radeon_hd_4850_gddr3_12620_marks

[basco]

http://www.xtremesystems.org/forums/attachment.php?attachmentid=94555&d=1234296145

 

only pic i found but if you can tell what is your volt chip others could help better then me.

 

i think its ncp5388 ?? maybe

Edited May 1, 2016 by basco

[shar00750]

it's look like ncp5392 , i am not sure . This is the card a little hard to see what is written.

Frequencies are locked to 750/1200, I also want to unlock them. i tried with rbe Without success.

[shar00750]

I made the pencil mod and could reach 780mhz but it's not enough , i want more with more voltage.

[TASOS]

Gigabyte was using a custom pcb for both their models GV-R485ZL-512H and GV-R485OC-1GH.

 

And , yes , the IC is NCP5392.

 

Look for the ic pdf , to get help about the vmod.

 

Also measure the resistance of the spot , you are doing the pencil mod.

 

 

edit

You are doing the pencil mod here ???

Edited May 7, 2016 by TASOS

[shar00750]

yes, it's the pencil mod.

[nachtfalke]

you need configure VID mod to go hight on core voltages , it´s only way to pass over voltage protection (OVP) witch will trigger above 1.3-1.35vgpu with NCP´s buck controllers!