ATI 4770 Vmods

[gurusan]

So, who is going to be the first to vmod ATI's first 40nm card?

[oli_ramsay]

http://www.xtremesystems.org/forums/...d.php?t=215521

If it uses the volterra controller, you could use this method. I'm eager to see some sick 40nm OC's :p

[Macadamia]

According to the Asus info, stock is 0.95 while 1.2 is maximum before you get to a hardmod.

Not volterra, so it should require some hand magick

[G.Foyle]

It's not Volterra, but the chip has I2C bus and voltage can be adjusted by software (ASUS Smart Doctor). I guess Rivatuner would work, too, but I can't scan SMBus due to unsupported driver.

There are two versions of reference board, one has less capacitors and glaciator-like cooler, and the other has all caps and a rear exhaust cooler.

Stock voltage is 1.05 V (3D) and 0.92 V (idle). Max selectable in SmartDoctor is 1.30 V, which gives ~1,33 V real under load (measured on reference board, the lite PWM variant).

Controller is ST Micro L6788A.
Here is a picture (higher quality available here):

[W1zzard]

front: http://www.techpowerup.com/reviews/A...front_full.jpg
back: http://www.techpowerup.com/reviews/A.../back_full.jpg

big pics, dont even try clicking on dialup. if you need better pics of certain areas pm/im/email me

[Quailane]

Damn, where did you get a card that had all the caps and mosfets on the board? I just ordered one but all I could find were the crappy versions.

[W1zzard]

review sample from amd

[G.Foyle]

Thanks for the pics W1zzard!
Your pics are so much better... I need to get myself a new camera.

[W1zzard]

eos 5d mark ii + sigma 50 mm macro

[Caped Crusader]

eos 5d mark ii + sigma 50 mm macro

wow! great camera!!

[regenade]

Someone just needs to get the dump of the Asus HD 4770 TOP BIOS and voila with voltage tweak here we come 1Ghz on a 99$ card
At 1 Ghz core/1200 mem, lemme bet it will be just ~10% slower than HD 4870 512 @ 1680X1050 res gaming MB

[gurusan]

Stock voltage is 1.05 V (3D) and 0.92 V (idle). Max selectable in SmartDoctor is 1.30 V, which gives ~1,33 V real under load (measured on reference board, the lite PWM variant).

What sort of clocks were you able to achieve on that voltage?

[G.Foyle]

I didn't test the card, it was my friend Mieszko (bedlamite here on XS). He got 900 MHz when clocking the core alone, 1150 MHz with memory alone, 850/1110 with both core and memory on the full PWM version, 850/1040 on the lite PWM version.
Here's some OCed to stock comparison: http://pclab.pl/art36361-16.html
It's in Polish but graphs are easy to understand.

[overcrash]

If I were to flash another brand with same design as the Asus, lets say Gigabyte do you think Smart doctor's voltage adjustment should work ?

[oohms]

If I were to flash another brand with same design as the Asus, lets say Gigabyte do you think Smart doctor's voltage adjustment should work ?

The asus TOP looks like a reference card.. and the voltage regulator can be adjusted by software... but since it doesnt look like the TOP will be launched, it might be hard/impossible to get the bios (and they might not have 4770 support in smart doctor)


edit: if anyone can get hold of the asus TOP bios, i would be really really interested

[G.Foyle]

I'll get you the bios tomorrow
ASUS TOP bios is crossflashable to reference cards as we've found out, and Smart Doctor works fine

[sabe]

Man I'll love to get my hands on that TOP bios as well, I'm sure many other people do too!

[Quailane]

I'll get you the bios tomorrow
ASUS TOP bios is crossflashable to reference cards as we've found out, and Smart Doctor works fine

Good. My HD4770 should get to my house tomorrow afternoon and I am going to get to work on it right away, but I may just go straight for a hard mod.

[whe3ls]

xfx is releasing a full PWM version

[Quailane]

xfx is releasing a full PWM version

Would the bioses even need to be different between the two cards? I would like to add the full power regulation circuitry. I have spare caps and I'm sure I could find proper mosfets. I know most people would just say that I'm dumb and to buy the other version of the card, but it isn't refundable and I'm confident in my soldering ability. The card gets here tomorrow evening and I plan on volt modding it before I go to bed. I've figured out 2 volt mods on my own before, a 6200TC I did a week ago, and my non-reference HD4850 I did last night.

[G.Foyle]

Here you go. Usual disclaimer applies: flash this at your own risk etc.

Download ASUS HD4770 TOP bios

Works on both lite and full PWM version and allows voltage adjustment via ASUS Smart Doctor.

[bedlamite]

He got 850 MHz when clocking the core alone, 1150 MHz with memory alone, 850/1110 with both core and memory on the full PWM version, 850/1040 on the lite PWM version.

Actualy it was 900+ MHz @ 1,3V

[G.Foyle]

Actualy it was 900+ MHz @ 1,3V

The review states 850 MHz
Whatever, it's fast like hell

[Wadkiller]

Just a quick question. Do you guys add mem heatsinks. I'll be receiving my 4770's during the week somewhere & i'll just test them with the stock cooler & when i get my back plates back for the maze4's i'll be watercooling them.

[Lightman]

The review states 850 MHz
Whatever, it's fast like hell

I've read 919MHz/1040MHz @1.3V
You're most likely reading too fasttttttt