Volt mods...

[Jeff]

has anyone done any yet? If so... please feel free to share them. :D

[saaya]

i will post multimeter readings of the interesting spots tomorrow in the morning :D

[NoStra]

Can't someone figure out how to voltmod the card?

[Jeff]

Don't think anybody has really tried yet have they?

Just wanted to be sure nobody was waiting in the wings with a volt mod before we all start scratching our heads. :D

It will happen... just like AMD's uber-locked chips... it will happen.

[Jeff]

http://www.adventurevision.com/somepictures/Xabre/Vdimm.jpg

I think this is the reg. for Vdimm. #1 measures 3.21v, both #2s measure 3.33v(my 3.3v rail), and #3 measures 2.51v.

Looks like #3 is what's being passed to the ram. Does anyone know what pin on the ram is the Vdimm pin? I'd like to just make sure this reg is what I think it is. ;)

The markings on the reg are...

H J
882
2CTA


Uh-oh... is this memory the kind that uses 3.3v? If so, then I reserve the right to delete the above. :D


[edit#2]
:censored: :cussing:
http://www.samsung.com/Products/Semiconductor/GraphicsMemory/DDRSDRAM/64Mbit/K4D64163HE/K4D64163HE.htm

Looks like I found the Vio. :) So, the ram already works off the 3.3v line... hmmmm... that'll take some different thinking then. ;) (wish someone already had these mods done)
[/edit#2]

[Holst]

Oooooh... looks like a sneaky plan is the order of the day then...

I wont have time to look at this till next week so good luck with the mods guys.

[Jeff]

I think we should concentrate on a GPU mod first... that's where I think we will get our biggest gains.

[[XC]thewildblue]

But I feel that mem will be more worth while as it gives greater gain in points.

[Jeff]

I've raised my 3.3v line to 3.45v and it didn't gain me a thing. I measured a couple of the Vdd lines on the memory chips and they were reading 3.45v so I know the voltage was getting to them.

Dunno... maybe Vddq could use a little bump. :confused:

I just think the Vgpu mod will show some immediate results... the memory may take a bit longer to finger out. ;)

[saaya]

have you meassured vref?

[Jeff]

Where? I'll measure it if someone points me in that direction. :)

If you're talking about the other Vregs... then yep, seems 2.00v-2.05v is what they are putting out.

[Holst]

http://www.xtremesystems.org/forums/showthread.php?s=&postid=313941#post313941

[Jeff]

Check out Holst's link... GPU volt mod has been fingered out, with a couple more of them just around the corner. :D

[Holst]

VDDQ/Vref mod is done

[NoStra]

Nice work Holst! Keep up the good job :)

I have something to do this weekend I see :P

[charlie]

Can someone give spec's on the DDR chips??

C

[NoStra]

Originally posted by charlie
Can someone give spec's on the DDR chips??

C

http://www.samsung.com/Products/Semiconductor/GraphicsMemory/DDRSDRAM/64Mbit/K4D64163HE/ds_k4d64163he.pdf