- Joined
- Dec 21, 2011
- Location
- Nerwport,NC
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ripped off smd cap off my p4c800
- Thread starter QuickFast
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OP
- Joined
- Dec 21, 2011
- Location
- Nerwport,NC
- Thread Starter
- #3
brown -IC adp3180\j 0344\32987.1 and i marked the pin wrong on the chip its should be the one next to it
edit: this diagram shows to smd capacitors- http://html.alldatasheet.com/html-pdf/93427/AD/ADP3180/281/11/ADP3180.html my board has only one connected to cscomp and cssum
edit: this diagram shows to smd capacitors- http://html.alldatasheet.com/html-pdf/93427/AD/ADP3180/281/11/ADP3180.html my board has only one connected to cscomp and cssum
Last edited:
OP
- Joined
- Dec 21, 2011
- Location
- Nerwport,NC
- Thread Starter
- #6
Got the board up and running again couldn't find a capacitor to solder on so i just soldered a piece of wire from point A to point B the funny thing is the Vdroop seems to be gone and it now over voltting the cpu by .016 volts but the real test will be when i take the board over 1.7 volts hope the board last through one more nite of benching in till i can find a new capacitor
OP
- Joined
- Dec 21, 2011
- Location
- Nerwport,NC
- Thread Starter
- #8
Hey Dolk thanks for looking out hope these pic will do the rest of the board is covered in plastic dip if you need more pic i could peel the plastic coating off.Would i be able to solder a cap in line with the wire i have all ready solder to the board because soldering skills sucks and i'am blind as a bat it took me forever to get the wire solder right
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It looks like it is a 1.5 or 3nF cap that sits between pin 18 and 17. This plays heavily in the assumption of the current sense loop. It would be best to replace the cap.
I do not have a good eye for size, either Bob will have to say what it is, or you can give me the length of the smd.
I do not have a good eye for size, either Bob will have to say what it is, or you can give me the length of the smd.
OP
- Joined
- Dec 21, 2011
- Location
- Nerwport,NC
- Thread Starter
- #11
thanks guys but right now curiosity got the best of me, want to see if Vdroop is gone with out that cap if Vdroop starts back up at 1.7-1.8 volts i'll solder a .001uF(the closest i got right now)and 27k resistor for Vdroop hope curiosity don't bite me in the ***
OP
- Joined
- Dec 21, 2011
- Location
- Nerwport,NC
- Thread Starter
- #14
She still lives after 4 hours of benching had no Vdroop that's because of the over volting that was happening for example 1.6 volts = 1.616\1.7 volts = 1.744\1.750 volts =1.808 i was hoping the Vdroop that was happening before i ripped that cap off was holding me back but looks i might just need LN2 to push these Northwoods further
Science Time:
If the pins in question are in fact the CSSUM and CSCOMP, which are the current sampling coupled pins than we can assume the rest: When this cap is removed it will create more noise for the CSCOMP line. This will skew the result for CSSUM, most likely adding more to the result. This will cause the Vdroop to be corrected in the case of Overclocking, it will be able to provide the extra current and voltage needed. In normal cases, it may be dangerous to keep the cap removed, since the correction will be so accurate, higher currents and voltages may pass. This could damage something.
If the pins in question are in fact the CSSUM and CSCOMP, which are the current sampling coupled pins than we can assume the rest: When this cap is removed it will create more noise for the CSCOMP line. This will skew the result for CSSUM, most likely adding more to the result. This will cause the Vdroop to be corrected in the case of Overclocking, it will be able to provide the extra current and voltage needed. In normal cases, it may be dangerous to keep the cap removed, since the correction will be so accurate, higher currents and voltages may pass. This could damage something.
