Powercolour 4770 PCS Volt Mod Help - Overclock.net

Willhemmens · 10-03-09

I need help Volt modding a ATI Powercolour 4770 PCS.

Info that might be useful:
I dont think the Asus Top bios will work as i dont think this card has voltage regulators.
It has a superior cooler and keeps the core down to 48'c (furmark) at 900MHz.
This card has a Red PCB
I can and will happily provide photo's/scans of the back and front of the card.
I dont have great soldering kit so if a pencil mod is do able, it would be MUCH easier.

Thanks

Error 404 · 10-04-09

Quote:

Originally Posted by Willhemmens

I need help Volt modding a ATI Powercolour 4770 PCS.

Info that might be useful:
I dont think the Asus Top bios will work as i dont think this card has voltage regulators. All cards have vregs, it's whether or not they're software controllable that is the deal.
It has a superior cooler and keeps the core down to 48'c (furmark) at 900MHz.Good.
This card has a Red PCB pretty?
I can and will happily provide photo's/scans of the back and front of the card.yes. We need these. Macro if you can, if not just post some general pics, and I'll circle areas that we/I'll need higher res shots of.
I dont have great soldering kit so if a pencil mod is do able, it would be MUCH easier. Oh. I'll try.

Thanks

In bold within the quote

Willhemmens · 10-05-09

Quote:

Originally Posted by Error 404

In bold within the quote

Ok thanks for that, i have just taken some photo's just uploading them now.

I can go MUCH closer than these, I have a Lumix TZ6 and its great for Macro.

I thought this might be of use:

Error 404 · 10-05-09

Here:

You may have taken a pic of the suspected memory controller already, in which case you don't need to take another, just tell me.

Also, I'm not 100% sure I'll come up with a mod, but I'll try

Edit: The chip with VHCT on it is *not* a voltage controller, afaik.

Willhemmens · 10-06-09

Ok. i have taken photo's. Do you need to be able to read whats on top of the chip?
Also thank you very much for just looking at the pictures.

Error 404 · 10-06-09

Yeah, I need to be able to read it. You can also just write out the codes. If the vGPU chip is something like "uP6201" the datasheets are nigh impossible to find, but I found a mention of it in an xbitlabs review...That should be enough for a vmod.

Willhemmens · 10-06-09

Quote:

Originally Posted by Error 404

Yeah, I need to be able to read it. You can also just write out the codes. If the vGPU chip is something like "uP6201" the datasheets are nigh impossible to find, but I found a mention of it in an xbitlabs review...That should be enough for a vmod.

Here you are.

Not sure if it would help but i have a good multimeter that i can use for testing.

**CL3P20** · 10-06-09

mod is from the UP- IC chip...on backside near the VGA connections... You need to measure the resistance from pin13-> ground for me to determine VR size. Then we can trace the mod point to a more suitable location for soldering.

pin is labeled in the picture FB = pin13

Powercolour 4770 PCS Volt Mod Help-4770pcs_vmod.jpg

datasheet for reference

Willhemmens · 10-06-09

Quote:

Originally Posted by CL3P20

mod is from the UP- IC chip...on backside near the VGA connections... You need to measure the resistance from pin13-> ground for me to determine VR size. Then we can trace the mod point to a more suitable location for soldering.

pin is labeled in the picture FB = pin13
Attachment 125255

datasheet for reference

instead of soldering (as i dont have much in the way of soldering kit) would a pencil mod be possible?

Just measured that, 5.54k

Error 404 · 10-06-09

Edit: For vMem, can you measure resistance from pin 7 on the uP6106 IC to ground?

Edit 2: I'm pretty sure that CL3P20 is right about the vGPU IC, that was my original assumption, but can you check to be sure? Just because the models that look exactly like it (and function similarly, not to mention actually have datasheets on the maker's site) have completely different pinouts (uP6203/2, etc.)

Quote:

Originally Posted by CL3P20

mod is from the UP- IC chip...on backside near the VGA connections... You need to measure the resistance from pin13-> ground for me to determine VR size. Then we can trace the mod point to a more suitable location for soldering.

pin is labeled in the picture FB = pin13
Attachment 125255

datasheet for reference

I figured that out from an XBit post, but didn't feel like trusting one source. Link's borked, btw

Quote:

Originally Posted by Willhemmens

Here you are.

Not sure if it would help but i have a good multimeter that i can use for testing.

Okay, that's a fairly common vMem chip. Should have something together shortly, or more DMM-ing to ask.

Quote:

Originally Posted by Willhemmens

instead of soldering (as i dont have much in the way of soldering kit) would a pencil mod be possible?

Just measured that, 5.54k

I'll check. Sounds like you'll need a 10K pot.

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Powercolour 4770 PCS Volt Mod Help

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