I've done some looking around, and it looks like pin 7 on the 1571 chip is feedback. Can you check the voltage on the pin that I've marked to try to confirm this please.
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I've done some looking around, and it looks like pin 7 on the 1571 chip is feedback. Can you check the voltage on the pin that I've marked to try to confirm this please.
when measuring on that leg i have the multimeter on 2V and it shows .979v and the multimeter on 20v it's 0,97v and it's sat on DC the multimeter?Quote:
Originally Posted by persivore
thats about what I expected :). Can you check the resistance between the same pin and ground please.Quote:
Originally Posted by chefnr1
measuring with the pc off it's show with MM on 2K=2,79k an with 20K=0,27K
Can you try soldering a 10k VR between pin 7 and ground.
Before you do the mod, find a voltage read point close to the area that the 1571 is in. I would expect that area on the card to be used for Vgpu, so look for a voltage which reads between about 1.2 to 1.6v. Make a note of this voltage, and check if it has increased at all after you have done the mod.
If that mods works ok, I'll look at Vdd/Vddq :)
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wow can you please give me an hint where to find a voltage read point because i have'nt a clue where to fin that??
and then i can set an reading point close to the end of the card as i use to do
Check around on the 3 MOSFETs at the back of the card or on the inductor on the front (looks like a black box with 1207-1R5 written on it in white) - there should be some exposed inductor leg either on the front or the back of the card.Quote:
Originally Posted by chefnr1
yes the mod is done before voltage was 1.334v and after with a 10K vrpot it's 1.365v
and the measuringpoints are these on the mosfets iv'e been markt with white:)
http://upl.silentwhisper.net/uplfold...ringpoints.jpg
i tried to rise it too and it works:)
EDIT: And i forgott to say thanks persivore for the help you take youre time to do, and i hope you will help with the vdd/vddq modd aswell :stick:
Can you check the resistance between pin 7 and ground on each of the other 1571's. I can mark pin 7 on a picture for you if you if you can get a closer pic of the other chips :)
yes i will take a closer pic if i can get it closer than before, but the batteri are on charge now so i have to wait a few houre :(Quote:
Originally Posted by persivore
heres the pic of the chip but that i markt with a ring is not 1571 it's show I and some strange sign and a R ,327H, 7Y6A , F730 you can see it if you look on it the other in the mittle i cant take a pic of i have insulation on that now because i have my singel stage on it well heres the pic..
http://upl.silentwhisper.net/uplfold...7/PICT1139.jpg
I've marked pin 7 on the attachment :)
the chip on the left shows with MM on 2K .532K and the other chip shows nothing att that leg :(
Sorry, I got the wrong pin for the chip on the right. I've marked the correct pin in green :)
For the chip on the left, connect a 10k VR between pin 7 and ground. I don't know which voltage it controls tho, but it will be either Vdd or Vddq.
i've allready measure that pin and it starts at .530K and then accelerate to .986KQuote:
Originally Posted by persivore
for that chip, connect a 20k VR between pin 7 and ground.Quote:
Originally Posted by chefnr1
witch is vdd and vddq of these two chips, and where do i measure the volts on it???
I don't know which chip will be for Vdd or Vddq. You should be able to get voltage readings for the 2 voltages from the indictors near the regulators (black cylinders with copper wire wrapped around). Vdd/Vddq should be about 2v on the card.
ok i'll test measure them and se what volt they give me...Quote:
Originally Posted by persivore
EDIT: they both give on the on each two solder pints 2,3v and 2,5v exacley on both, hehe hard to say wich is wich :)
http://www.vihanepc.com/margusser/x700.jpg
where that v-mem point? :D
vgpu is already done... http://www.vihanepc.com/margusser/x700pro%20800x600.jpg
WOW havent things changed in the last 1.5-2 years . I am currently between cards and am back on my old x700 pro , could someone summarise the volt mods on this card or point me to where they may be .
:up: