ATI 4770 Vmods

[pvhk]

no, it is the same chip on the PCS hd4770: no compatibility with smartdoctor:
http://www.techpowerup.com/reviews/P...770_PCS/4.html

[pal]

Thanks for link but my gddr5 can't go over 861Mhz at stock voltages.
Then mybe this chip do not have OCP protection like other chip.

[pal]

This HD4770 from Shappire with BLUE PCB has very hard problem with mem overclocking. It looks like it have bigger problem than PCS hd 4770 becouse on that test they oc memory to 1050mhz and they found some issues but on this card this issues doesn't help.
Is there any chanse to get new bios for this card?

[pal]

anyone any idea?

Hard volt mod for memory doesn't help.

[Rembulan]

maybe a closed pic from back and front side will help to made people found what the diff with a red ones,

sorry my bad I dont see you have upload some pic before

[pal]

Yes, but those pictures are bad. Differnets beetwen those two cards are that blue pcb card have diferent vgpu controler, I think is the same as on 4850. But I think this is not a problem becouse I can OC gpu to 950MHZ on stock voltages.
vmem controler is the same as on red card and also volt mod is the giving more voltage to memory.
I think it is the same crap as this card
http://www.techpowerup.com/reviews/P...770_PCS/4.html
There, in Overclock section, they found some problems with overclocking, but on this card what they wrote, doesn't help. Also my friend have the same card, Sapp, HD 4770 blue PCB(Artic Cooling) and he have the same problem with memory overclocking.
Maybe we need just a new better bios for this card.

[Rembulan]

Yes, but those pictures are bad. Differnets beetwen those two cards are that blue pcb card have diferent vgpu controler, I think is the same as on 4850. But I think this is not a problem becouse I can OC gpu to 950MHZ on stock voltages.
vmem controler is the same as on red card and also volt mod is the giving more voltage to memory.
I think it is the same crap as this card
http://www.techpowerup.com/reviews/P...770_PCS/4.html
There, in Overclock section, they found some problems with overclocking, but on this card what they wrote, doesn't help. Also my friend have the same card, Sapp, HD 4770 blue PCB(Artic Cooling) and he have the same problem with memory overclocking.
Maybe we need just a new better bios for this card.

you are lucky actually My sapphire red card 4770 only can reach 860 on GPU and 1050 on mem I still looking for multiturn VR to bring up the voltage, I am not so keen in flashing Bios.

[pal]

Here you have volt mods.


One pin from trimmer to yellow point and other on GND (-) whereever you want. I normaly use GND from PCI-E power conector.


This is for vmem mod.


First check, if you have the same VGPU controler and then do something. I use 100kOhm trimers(64W).
With cgpu mod you will can raise voltage till 1.35V , if you go over the card will turn off and you will need to restart. Why? Becouse vgpu controler have Over curent protection.
If, you want go over 1.35v on gpu you will first need flash your card with Asus TOP bios, than set max voltage by software and then raise voltage by trimer, I think.

[Rembulan]

Finally today I can do something with my 4770 first I like to try a soft mod use asus smart doctor and I got 954 on GPU and 1033 on RAM (it can go higher but I need 24/7 stable for folding)and I found 2 problem :

1. smart doctor only allow me to go to 850 so I must use riva tuner and thing get complicated when I boot up the computer the riva tuner setting is lost and back to asus setting, any body has a hint to solve this ?

2. I can't find any RAM voltag adjustment asus, must I use hard mod for RAM ?

[pal]

Did you flash the card with ASUS top BIOS? When you flash with ASUS TOP bios then you can OC in CCC to 1Ghz. For RAM I think there are no voltage adjustment, only for vgpu.

[d4d4cH]

hello
i have 4770 from sapphire and club3d. i flashed the cards with asus bios, but i am still unable to change the voltages all the way up to 1.2V
only thing that works is ati tray tools and it has 0.9-1.05 range. smartdoctor, gpu tune, afterburner have no impact in voltage change.

does someone know a solution to this?

thanks