ATI 4770 Vmods

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05-18-2009, 10:40 PM
G.Foyle

Quote:

Originally Posted by BulldogPO

Anyone of you has ASUS TOP bios?

Here be the link to TOP BIOS.
05-19-2009, 08:22 AM
BulldogPO

Thnx.
05-19-2009, 12:36 PM
Praxis1452

Is there a way to make a copy of your current card bios?
05-19-2009, 02:48 PM
Quailane

So I modded my card but I'm afraid to try it because I think I may have messed something up. Can anyone tell me the resistance between vgpu and ground and vmem and ground? Thanks a lot!
05-19-2009, 11:17 PM
G.Foyle

Quote:

Originally Posted by Praxis1452

Is there a way to make a copy of your current card bios?

You can do it with atiflash. You need a bootable USB drive (this excellent guide at TPU tells you how to do it) and atiflash (downloadable from TPU as well).

Boot form your USB stick, type "atiflash -s 0 name.bin 20000" where -s means to save a bios dump, 0 means to save from first graphic adapter, name.bin is the name of your saved dump, and 20000 is perhaps the most important - it's hexadecimal for 131072 bytes or 128 kB, it's the size of bios data to read. Saving bios with GPU-Z will only save first 64kB, and flashing your card with 64 kB bios will brick it.
05-19-2009, 11:22 PM
W1zzard

Quote:

Originally Posted by xoqolatl

Saving bios with GPU-Z will only save first 64kB, and flashing your card with 64 kB bios will brick it.

that's fixed in the latest version
05-20-2009, 08:06 AM
G.Foyle

Thanks W1zzard, I didn't know.
BTW, link to GPU-Z in your sig is dead.
05-20-2009, 09:19 AM
Quailane

Nobody?

NVM. I got the values and I'm pretty sure the card will work now, but I'm busy so I'll try it out tomorrow.
05-26-2009, 11:08 PM
lamby_splendid

why i cant go 900 on core? it cant pass furmark..:(

i use 4770 powercolor,,any suggest?
05-27-2009, 08:55 PM
drizzt5

So I am thinking of trading my 4850 for a 4770 because I heard about the good results with software voltage.

I want to put it underwater, do you think I'll be able to get 1000 or at least in the 900's?
05-31-2009, 02:01 AM
lukeo

Hmm recently bought two 4770's myself. Tried flashing to see how much I'd gain. Sadly not much.

The flash process was straight forward (for those that don't or can't make a USB bootable drive I recommend Ultimate Boot CD for windows, google it).

After flashing the latest version of smart doctor would start (5.38), and I could adjust the gpu vcore slider upto 1.3volts. Selecting anything over 1.25v would cause a nice crosshatch pattern to appear on my screen and hard lock my PC. So at least I knew my limit :)

Before the flash I could get 875mhz core, and ran at 860mhz for 24/7 stability.

After the flash I could at least complete 3dtoss runs at 900mhz core but it wasn't stable I've had to drop back to 870mhz.

I think taking these two cards out, removing the heatsinks, and re-applying some thermal goo may be the go if I want better results.
06-01-2009, 10:10 AM
quake6

Anyone did hard mode? I'm wiling to do it, but don't know resistance for potentiometer...
06-07-2009, 11:59 AM
Riska

I will say 20kohm because the resistance for fb is 2kohm and it is save 2 say x10 of that.
I will post pics in a coupple of days when i get my card
06-07-2009, 12:06 PM
Paxi

I´m getting a 4770 next week myself, gonna put it under DICE soon. So it would be very apprecitated to see a working vmod for it, maybe with a little guide :)
06-19-2009, 07:34 AM
OneProdigy

vGPU:
My dmm showed 2.01kohms (~0.9V) default resistance for GPU.
After adding a 50kohms VR (@max) the resistance went down to ~1.6kohms which was a little too much for my taste.
So i started over using a 100kohms VR which worked out just perfect (1.94kohms).

vMEM:
Default vMEM was 1.65V.
After soldering in a 50kohm VR (@max) it went up to 1.82V which is ok with me.
If you want to play it safe use a 100kohm VR for vMEM too. ;)

Here you go:
http://foto.arcor-online.net/palb/al...6339623435.jpg
06-19-2009, 09:04 AM
Clint

Quote:

Originally Posted by OneProdigy

vGPU:
My dmm showed 2.01kohms (~0.9V) default resistance for GPU.
After adding a 50kohms VR (@max) the resistance went down to ~1.6kohms which was a little too much for my taste.
So i started over using a 100kohms VR which worked out just perfect (1.94kohms).

vMEM:
Default vMEM was 1.65V.
After soldering in a 50kohm VR (@max) it went up to 1.82V which is ok with me.
If you want to play it safe also use a 100kohm VR for vMEM. ;)

Here you go:
http://foto.arcor-online.net/palb/al...3536343233.jpg

Excellent!:up:

Could you please point out where to measure the vMEM?
06-19-2009, 10:59 AM
OneProdigy

Added the readout points to my pic above. ;)
06-19-2009, 12:15 PM
Clint

Quote:

Originally Posted by OneProdigy

Added the readout points to my pic above. ;)

Thanks!:up:
06-24-2009, 07:01 AM
Clint

The card overvolts 0.5v on the core compared to what is set in Smartdoctor. As for RAMs they get feeded with 1.65v.

If I cool them properly, how much could I feed them for 24/7 usage?

Do GDDR5/Quimonda scale good on voltage increasing?
06-26-2009, 11:16 AM
pal

I don't know how it is with Quimonda GDDR5, but Quimonda memory on 8600GTS wasnn't good for OC. Even 2.3V(vmod) I couldn't pass 1200Mhz, 1000mhz(deafult).
07-13-2009, 03:48 AM
Frk

Quote:

Originally Posted by OneProdigy

vGPU:
My dmm showed 2.01kohms (~0.9V) default resistance for GPU.
After adding a 50kohms VR (@max) the resistance went down to ~1.6kohms which was a little too much for my taste.
So i started over using a 100kohms VR which worked out just perfect (1.94kohms).

vMEM:
Default vMEM was 1.65V.
After soldering in a 50kohm VR (@max) it went up to 1.82V which is ok with me.
If you want to play it safe use a 100kohm VR for vMEM too. ;)

Here you go:
http://foto.arcor-online.net/palb/al...6339623435.jpg

Hello, you get to go on with what frequency vmod ?
07-13-2009, 01:44 PM
Riska

I have modded mine cards but they dont need much voltage jult 1.17vgpu to do 1050mhz on air and 1.7vmem to do 1250mhz
07-14-2009, 03:48 AM
Gaul

I'll found the best one ( my friend ) 4770 @ 1025/1200 vgpu 1.111

GPU Score > 10.000

http://img11.imageshack.us/img11/1091/best4770.jpg
07-21-2009, 02:12 AM
randa

Quote:

Originally Posted by Gaul

I'll found the best one ( my friend ) 4770 @ 1025/1200 vgpu 1.111

GPU Score > 10.000

http://img11.imageshack.us/img11/1091/best4770.jpg

just 1 word : FANTASTIC :up::up::up:
08-04-2009, 09:09 PM
pal

I have HD 4770 version where are missing few MOSFET and capatitators. Are there any diference in OC performance?
And what, if I buy exsact mosfet and capatitators, will be something differnet?

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