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hi!
im searching for a vtt and vdimm mod for my an8.
vdimm should got up to 3,2v (vtt 1,6v).
i took some pictures from the places where i assume the voltage feed for vtt / vdimm.
feel free to ask me for measurements or if you think something is missing. :stick:
tia masterpain
Can you tell me what is written on the chips I have marked please.
its hardly noticable but i think thats it.Quote:
Originally Posted by persivore
threre is the winbond logo on both of them...
I think the W83320S is the Vdimm regulator, but I can't find the datasheet for the chip. I will email winbond to try to get them to send the datasheet to me.
thanks a lot. :toast:Quote:
Originally Posted by persivore
these are great news.:banana:
any news from winbond?
I haven't had any reply yet. I'll try contacting them again.
heh...i highly doubt those are for vdimm or vtt, peel the sticker off that uguru chip and tell us what it says :D Or post a full board pic for me :P
-CaT
I measured vddr and vtt at that little 2.0 amp ddr bus termination regulator that can be found in his middle pic in between all those caps. What really needs to be done is a vtt mod as vddr can be done easily with a cap mod. Here is some info on that chip and voltage readings I have taken off of it.Quote:
Originally Posted by CaTalyst.X
http://www.xtremesystems.org/forums/...ad.php?t=56215
that is written on the µguru chip:
winbond
w83l9500
243325202
441acsa
i will post some hires pics from the chip in the next hours.
Can you check that the line that says W83L9500 isn't W83L950D. This is the closet thing I've managed to find to the part number you posted :(. The uguru chip, whatever it is, is too far away from the Dimm slots for it to be the dimm regulator IMO.
i took a closer look. its the W83L950D.
some datasheet... hope it helps
http://www.xtremesystems.org/forums/...chmentid=28408
me also thinking the W83320S is the Vdimm regulator... :)
the pics
(56k warning)
I'm having a problem trying to get the datasheet for the W83302s, which I think is the Vdimm regulator (see this thread as well). Would it be possible to get voltage readings at each of the pins on the chip so that I can try to work out which pin might be the mod point. I've also posted this in the thread I linked to above as well, becasue if I can get the voltage readings from 2 different boards using the same chip I should be able to compare the voltages and find the right point.
on my way. :hehe:
edit: results:
measured it twice to check if its correct.
12v was at 12,18
5v was at 5,12
3,3v was at 3,39
Thanks for the readings :)
I think I know which pin is the mod point, but I'm going to wait and see if rav286k1 comes back with the same voltage on the pin that I think is the mod point.
Edit: What was Vdimm set at btw?
everything @ stock. iirc 2,6v.Quote:
Originally Posted by persivore
i do not have a working graphicscard at the moment.
my x850 gets the vgpu atm. just have to find the time for it.
i will chek with a pci graphiccard asap.
so i hope i get this right.Quote:
Originally Posted by tictac
i have increase the resitance @ vsense to get a higher vtt?
the datasheet there did not match excat part number...Quote:
Originally Posted by masterpain
W83310S
Datasheet
W83310S-R
W83310S-N
:nono:
Thanks for the pin-outs tictac :). I think that Vtt should follow with both the W83310S-R and the W83310S-N, so I think it should be the same for the W83310S regulator.
@masterpain, can you check the resistance between the pin I have marked and a Vdimm read point (ie. pin 7 on the Dimm slot), and the pin I marked and ground. I think this is the correct mod point, but I'm not sure.
Hi Persivore,Quote:
Originally Posted by persivore
as i told you in my post, tomorrow i get voltage reading for each pins of chip.
Many thanks for your efforts.
Hi persivore,
here my voltage reading...
first the 83320s chip near DDR slot:
http://img213.echo.cx/img213/9378/83...slot7vu.th.gif
and then the 83320s chip near Northbridge:
http://img213.echo.cx/img213/6291/83...arnb8lg.th.gif
Hope this could be help you!
Bye, Andrea.
resistance with my found vdimm readout says 1Mohm.
Thanks for the reading :).That resistance looks very high imo. I'm going to wait for rav286k1 to try a Vdimm mod with what I think is the correct pin before I work on more mods using this chip, to be sure that we have the right point :)Quote:
Originally Posted by masterpain
hi!
any news from rav286k1 yet?
i will will check the readout again if it is much too high.
Hi Masterpain,Quote:
Originally Posted by masterpain
sorry but until my friend does not return from his holiday I can't mod the motherboard. ;)
no problem, i think i will keep hold on this board because of the upcoming venice cores.Quote:
Originally Posted by rav286k1
Did you check the resistance with the power on or off?Quote:
Originally Posted by masterpain
power was off, iirc, i will check again, i am currentl sitting next to my mainrig, i will check again.Quote:
Originally Posted by persivore
edit: its again the same value. power was off during measurement.
Ok, thanks for checking. If I have got the right point, there might be a problem finding a multi-turn variable resistor with a high enough value to only produce a small voltage increase at maximum resistance.Quote:
Originally Posted by masterpain
since my an8 went uo in smoke for no reason it will take a month to get this mod runinng.
@rav286k1: any news from your side?
Hei... there will be new board that features higher voltage
the ABIT AN8 Fatal1ty SLI
Vdimm : 2.55V - 3.55V
Vtt voltage: 1.25v ~ 1.75v and DDR/2
http://www.xtremesystems.org/forums/...chmentid=30296
mmh, nice.
i will get one as soon as its available in germany.
Can someone please solder a 100 KOhms trimmer 25 turns to pin 14 OR to pin 8 of the Winbond W83320S IC to see if it change the Vdimm?......One of those two legs (14 or 8) must be the Vdimm mod........First try on oin 8 and if it doesn't works, try on pin 14.......Beware to pre-trimm it at it's MAXIMUM resistance (ex. 100 KOhms) before soldering it.....The other Winbond IC (W83310S) with the 8 legs is for the VTT - autotracking and autocorrecting the VTT - .....So no VTT is needed for this mobo.... ;)
i will try it as soon as my board is back from abit.
still waiting.... :rolleyes:
@ tictac: is this theboard you where talking about?
http://www2.abit.com.tw/page/en/moth...939&DEFTITLE=Y
yes it is :yepp:
there are also cheaper veersion with 3.55V vdimm
AN8 Ultra :up:
AN8 SLI :up: