Sry, forgot to enter my sig.Quote:
Originally Posted by Johnny Bravo
The test I spoke of was with a 760 at 1.425Vcore on a Vdrooped P4C800E-Deluxe with 2x512mb XMS3200C2 (TCCD)
Sry, forgot to enter my sig.Quote:
Originally Posted by Johnny Bravo
The test I spoke of was with a 760 at 1.425Vcore on a Vdrooped P4C800E-Deluxe with 2x512mb XMS3200C2 (TCCD)
For VCCA supply I believe it is not big MOsFet but ordinary small voltage regulator [4DASE] or that even smaller transistor close to it according to bigger pics I have, located between PSU connector/missin el.cap & 14pin IC on the corner of CT-adapter... Its [4DASE] middle pin is connected (shorted) to metal base (probably IN), while one of the others is OUT or ref.voltage; I do not know exactly which one to desolder to measure current (the one with much higher voltage on it!).Quote:
Originally Posted by Johnny Bravo
check & try this stuff from my site : [ http://freeweb.siol.net/jerman55/HP/benchMem.htm ]Quote:
Originally Posted by B33T
Bro, why don't you do us all the favor on this thread and measure the vcca pins on the adapter yourself and give us the chart:D . You seem to be much more knowlegeable person than anyone in here. Measuring the vcca pins from the cpu while it's running would take a lot BIGGER ballz than you could ever think off. We already have a measuring point that hipro5 provided. So what's wrong with it?:DQuote:
Originally Posted by Spajky
I think the problem that our friend Spajky don't have a Dothan/CT-479 setup to play with. ;)Quote:
Originally Posted by AKURA
I've done some measurements allready. At 3,1V Vcca the Vcca current flow were about 220mA. The flow stayed the same at any speed and any CPU load. I used a setup of two CT-479's one for Vcca-feeding and one on the motherboard that had disconnected it's Vcca supply.
IC, thx for clearing that up kamerat. I thought spajky has an adapter and a pm also.:D So bro, your 100% sure that at 3Vcca we are at the max of that 220mA of what the datasheets says,eh? Great news then for everyone.:toast:Quote:
Originally Posted by Kamerat
Wow; according to this, at 3,3Vcca we can aspect current feed approx.240mA & thats DOUBLE than Intel recommends. IMHO that is really a maximum the chips internal circuitry can handle longer with good cooling! So here is my new advice: NEVER supply chip with HIGHER THAN 3,3 VCCA !!! /even if having eXtreme cooling involved!/ ... we need no further dead heroes ... thanks for the info Kamerat! very useful one indeed ... :)Quote:
Originally Posted by Kamerat
Ps.: few days ago I could get a perfectly good P4C800e-Dlx for 55$ /45€/ after contacting the vendor in my country, I immediately sent him my purchasing data to his Yahoo mailbox .. he never got it /undelivered returned mail next day reply/; he sold it briefly later .. grrr :( ... damn Yahoo mail service ... lost oportunity ... waiting 4 next close-so-good one ..
PS.: (another one) The further another mod challenge arising! The newest Yonah Cpu one /Intel-Core_Duo/. Intel claims, that for it is a need of a new chipset & MoBo [ http://babelfish.altavista.digital.c...8i945gtmf.html ]. Do they lie us again? :cool: /That remembers me to the Tualatin & BX times! Maybe some interchanging & rewireing pins could do the job again? Who knows! When prices drop [ http://slike.slo-tech.com/17335.jpg ], maybe someone will try, I got´da d/l datasheets & study stuff a bit "deeper" some day/ ..
so.... any updates?Quote:
Originally Posted by hipro5
Think I killed my 730 to, ran 3,1V Vcca. My system refused to boot last morning, tried both my P4GD1 and P4C800-E. I will try my other CT-479 adapter when I come home.
Now I'm wondering what CPU I'm going to buy. :)
I don't think you did it (hope so); IMHO the Vcca voltage regulator on CT-479 went south ... :(Quote:
Originally Posted by Kamerat
You sure you didnt broke a pin in purpose?:D :D :D Looks like the magic overclocking ballz is telling me that you need an PM 780ES :D It could be wrong though, maybe a conroe:DQuote:
Originally Posted by Kamerat
Hey man, i've been using 2.8Vcca for almost 3 weeks now. Everything is silky smooth. It's probably your adapter.
ugh, i need an alternate solder point. i removed my heatsink earlier and the vcca mod fell off!
i think the temps got a little too high with my passive cooling tests and the hotglue came off :(
pics here:
http://www.cryo-laboratory.com/uploa...x/resistor.JPG
http://www.cryo-laboratory.com/uploa.../resistor2.JPG
AND my die has a nice chunk out of it :(
pic here:
http://www.cryo-laboratory.com/uploa...irthix/die.JPG
does anyone have an alternate solder point for them? the trace is pulled up on the edge-side contact
btw, it still works hehe, jsut.. fsbs SUCK. less than 160 lol. i have to find an alternate point.
is that solder pab on the left lifted too or just not clean?
Also :eek: your die looks wrecked man!
lol mine fell off my last adapter too, when i powered on the thing blew up..
atleast yours didn't blow up :rolleyes:
someone has to have al alternate solder point.
running this chip at stock is painful :(
Nobody helps in here!........WTF..?......I thought that we help each other!.......Anyways.........Quote:
Originally Posted by cirthix
@ cirthix next to the missing resistor and on it's LEFT side, is another resistor(black) that says "810" ON it as for the FIRST photo of yours.......You can solder a 5KOhms 25 turns trimmer on it's UPPER side (as for the FIRST photo of yours) to GROUNG.....Trimm it at 3KOhms for start......AFTER soldering it, you must measure ~1.2KOhms on the two pins of the trimmer before power up......OR you can solder the trimmer on leg 2 of the IC LM324 to ground......To be SURE IF is the leg 2 of the IC, you must see a short circuit when measure with a multimeter picked the Ohms of it (leg 2), with the 810OHms resistor I said above.......
Does this picture look right?Quote:
Originally Posted by hipro5
http://www.cryo-laboratory.com/uploa...irthix/mod.jpg
It looks like (i havent measured) that the red contacts are shorted, is this right?
where is a convenient ground i can use for fixing the mod?
where would i measure vcca from?
Yup thats about right, just ground it to where the floppy power connector ground is. It should do it. If you want the wire your soldered to, to not get snagged again. Put a little krazy glue on the wire and make it stick comfortably to the adapters pcb, so when you accidentally pull the wire. The pressure isn't at the solder point but the wire that is krazy glued to the pcb. :) I did the same thing on mine and that's where the stock resistor had come off since i couldn't get the soldered wires to stick properly to the solder point coz its small.Quote:
Originally Posted by cirthix
Yes it is right......:)Quote:
Originally Posted by cirthix
You can measure the VCCA on the jumpers for the 133MHz fsb or on one side of a big ceramic capacitor above them.......
hipro, when are we gonna get those new mods!? :P
cmon cmon, I want mods :D
i get really odd readings from the fsb jumpers
where's a good ground on the top side of the adapter?
are the red pins in my picture shorted?
what are the new mods?
Quote:
Originally Posted by cirthix
Bro, If I were you i'd rather get a new adapter.:D :D What you have now is a complete mess. Bag that one your trying to fix and shove it to your closet.:D
It still pisses me today that i broke my Zippy 460W and 3xP4C800-E from vmodding them. Sh it happens m8, Sh it happens.......The only fix is buy a new one.:D
Also, if people do the VCCA mod please DONT put your CPU in right away, plug the CT-479 into the power and turn it on, then take a measurement of the new VCCA voltage and make sure it's what youexpect and def not over 3.3volts! I've made this mistake, and learn't the hard way, theres no reason for anyone else to do the same :)
Quote:
Originally Posted by Johnny Bravo
that's a good idea. have you tested that the adapter isnt harmed by having no cpu in it?
From my understanding the circuit is just providing power and the CPU acts as a load so when not connected it's just not supplying a large current but the voltage is the same. Have run mine without CPU and still goes strong. While this may be true the same doesnt apply to say, testing a vcore mod, if you don't insert a CPU there the vcore reading is in the millivolt range, I suspect this is because the CPU is required to "complete" the circuit, or add a resistive load. This does not seem to tbe the case for the VCCA however. Perhaps the views of George (Hipro5) or similar vmodders would be helpful in this matter.
What exactly did you learned the hard way there?:D :D :DQuote:
Originally Posted by Johnny Bravo