Where do you live. I'm sure there is someone in your state/country that can mod it for you for a price. Sorry for the OT.Quote:
Originally Posted by ibby
Where do you live. I'm sure there is someone in your state/country that can mod it for you for a price. Sorry for the OT.Quote:
Originally Posted by ibby
i think can try shading the resistor to lower its resistance.Quote:
Originally Posted by ibby
the resistor the controls the Vcca.
can pencil mod is pretty unpredictable, gotta be careful
... & since it was not enough 4 U , U pushed it harder (w/o proper resistor!) :rolleyes: ... well, your Cpu isn´t really dead, but rather unworkable (same result at the end!). I will explain:Quote:
Originally Posted by Kamerat
all modern CPUs have built-in at the edge of the core on pins connections static electricity protection in a form of 4V zenner diodes which die, if they get to much current over that voltage there & practically shorten permanently that pin to the ground (usually a whole bank of them!). Thats why that OCZ Ram Booster limits Vdimm to a max 3,9V! The "ground" gets too much difference to the main one & MoBo shuts than CPUs power down for itself protection!
That same thing happened to me 4y ago accidentaly (when I by case (shaky hands) touched/shorted with multimeter probe wrong wires on my Cpu-diode "gadget" prototype-see my site/electronics .. & killed my ex-C400&600 since it got on Cpu-diode pin some 5V ... :(
If your lucky (check it with ohm/multimeter) & all side pins near that Vcca control one on a Cpu are not shorted to the Vss´s (if only that one is), may be [maybe!] that breaking that pin will revive Cpu function at least on default frequency. Worth a try ! Check it ! Before that:
Are U shure, that maybe that CT adapter is still OK (or maybe damaged & Cpu still Ok??), worth a try to check voltages there around that Vcca control pin, especially if just only Vcca voltage regulator on CT adapt. is dead ...
I´m a bit :mad: :stick: at U, since You´ve been first one to break practically that 185MHz Fsb barier on C-M successfuly (hypro5´s credit & confirmed my original adapters mods ideas on these forums some half a year ago) ... I thought to ask you to do 4 me some specific benches of such OC-ed C-M when I saw that your post first, but now is 99% to late IMHO ... :slobber:
Well your unfortunate end experiment has also some positive stuff:
It proved that me & hipro5 could be wrong about maximum Vcca´s control voltage on that pin long term & could be rised even up to 3,9V max on that Vcca for internal Cpu pin (supply for internal PLL) UNLESS we take care not too much rise its current (Intel datasheet states 120mA !!! there)
So what we can for example do probably? Another Mine IDEA : We can tight that pin even almost directly (thru some diode! ad maybe small value resistor serially+cap than parrallel to Gnd at pin) to a Vdimm voltage on the MoBo! (diode should be point type glass encapsuled HF demodulating germanium or shottky one, voltage drop around 1/4 V) So we could than rise it at wish together with Vdimm voltage within Bios setting!!! :) Starting at 2,2 to max.3V on that pin w/o OCZ booster! IMHO safe enough long term ... :cool: :D .. heh .. heh ...
Thank you very much for your input Spajky! :toast:
Measured all four Vcca pins (located at F26, B1, N1 and AC26) to the sorrounding VSS pins. None of the where shorted to the VSS pinsQuote:
Originally Posted by Spajky
I'm using the same adapter with my 730 right now, so it's working.Quote:
Are U shure, that maybe that CT adapter is still OK (or maybe damaged & Cpu still Ok??), worth a try to check voltages there around that Vcca control pin, especially if just only Vcca voltage regulator on CT adapt. is dead ...
Also a bit mad at myself for being stupid. :slap: <- Me on the right side, you on the left. :p:Quote:
I´m a bit :mad: :stick: at U, since You´ve been first one to break practically that 185MHz Fsb barier on C-M successfuly (hypro5´s credit & confirmed my original adapters mods ideas on these forums some half a year ago) ... I thought to ask you to do 4 me some specific benches of such OC-ed C-M when I saw that your post first, but now is 99% to late IMHO ... :slobber:
Nice idea! :DQuote:
Well your unfortunate end experiment has also some positive stuff:
It proved that me & hipro5 could be wrong about maximum Vcca´s control voltage on that pin long term & could be rised even up to 3,9V max on that Vcca for internal Cpu pin (supply for internal PLL) UNLESS we take care not too much rise its current (Intel datasheet states 120mA !!! there)
So what we can for example do probably? Another Mine IDEA : We can tight that pin even almost directly (thru some diode! ad maybe small value resistor serially+cap than parrallel to Gnd at pin) to a Vdimm voltage on the MoBo! (diode should be point type glass encapsuled HF demodulating germanium or shottky one, voltage drop around 1/4 V) So we could than rise it at wish together with Vdimm voltage within Bios setting!!! :) Starting at 2,2 to max.3V on that pin w/o OCZ booster! IMHO safe enough long term ... :cool: :D .. heh .. heh ...
pumping 2.3v VCCA through my 760 24/7 now
can boot at 270 but its unstable
still though, I'm kool with jus being able to memtest at 270 :D
Threw my 730 and CT-479 on a friends unmodded P4C800-E to see what FSB I could get with 3,4V Vcca: http://valid.x86-secret.com/show_oc?id=68751 (not stable at this speed) :)
Very nice! :toast:Quote:
Originally Posted by lawrywild
Have to do a VDIMM mod myself to se what kind of 1:1 speeds I can run on this P4C800.
holy crap thats sick!!!!!!!! :slobber:Quote:
Originally Posted by Kamerat
i gotta try and see how high I can go in windows now!!!!!! :D
Try to increase your AGP-speed if you got an instant crash in Windows, at 80MHz AGP the maximum FSB I can boot with is 333MHz. ;)Quote:
Originally Posted by lawrywild
Tested 3,40V vs. stock 1,52V Vcca. Max boot with 1,52V is 243MHz FSB while max with 3,40V is 333MHz (AGP at 80MHz). That's a 90MHz or 37% increase in max FSB. :slobber: :banana:
lol i would if my x800 and p4c800-e didn't blow up :stick:Quote:
Originally Posted by Kamerat
Oh, I'm sorry for your loss... :(Quote:
Originally Posted by lawrywild
How did it happend?
i have to do that VCCA mod...isn't dangerous a 3,4v VCCA? i think that a 1.9/2.0v will be enought to boot at 250/260, that is enought for daily use...
I cant guarantee it's safe with 3,4V. But I don't think your'e taking any risk if you keep Vcca under 2,5V. :)Quote:
Originally Posted by Malachia
the damn molex casing on the x800 is so circular that the molex managed to fit in the wrong way without me realising :( :slap: (i was rushing evrything as it took ages to get my mobo into the damn super lanboy.. :stick: )Quote:
Originally Posted by Kamerat
so basically i powered on and my eyes were nearly watering coz of the smoke :slap:
Sure you didn't only blew a cap? I actually pushed 14V into the 5V intake of my X800 Pro, only thing that happend were a capasitor blewing up (rated for 6V). Caused a lot of smoke and smell.Quote:
Originally Posted by lawrywild
Picture of the damaged cap.
Replacement cap.
Actually running 12V at the 5V intake when I got 40k in 01 after I changed to a 16V rated cap, got lower drop in VGPU doing it that way.
:slapass:
i think i will try from 1.8 until i reach a VCCA that leave me to boot at 250/260!
well, the smoke smell definately comes from that area, but its definately not as blatant as urs lol :p:Quote:
Originally Posted by Kamerat
if i can get ati to gimme a replacement or sumin, that i can sell, then I wont try fixing anything but if they turn me down, ill take some caps off a x800 that has dodgy vram or something which i have and swap them over to try and fix it :)
I was thinking about more pins to check if shorted to Vss or Vcc or Vcca; a bunch of them there on the side of a chip (check datasheet!), especially i/o PLL & signaling pins & especially that Vcca offended controlling pin that got too much voltage on it. If others are ok & shorted just the offending one, maybe break it phisically & try to boot Cpu w/o it ... :rolleyes:Quote:
Originally Posted by Kamerat
PS.: Can you try to measure the current that flows to that pin at stock (1,52V) voltage, at 1,8; 2, 2,15 etc ... till 3,3V included with your working chip for us too see, when it (if) exceeds Intels 120mA rated barrier ? ( try at stock speed & than OC-ed to see us if different than...) Maybe you will need to take into consideration also already present current bypass by original adapter circuitry to that pin ... ! Can You MAKE some CHART than? :cool:
can anyone post a good pikture were i have to brace the 47uF/16V Tantalum SMD ?
i only want to know were are the bracepoints!
those are the correct solder points. you have to scrape the coating thoughQuote:
Originally Posted by lukiluke
NO IT IS NOT!Quote:
Originally Posted by lukiluke
the right point is wrong.. just scrape of the paint from the ground on the ct above that point!
wait wheres the error in that photo? the large area is a 12v plane and the other point is GND (i persume)
thx to waus-mod
if i understand right this are the bravepoints?
(please excuse my bad english)
:stick: hm this one ?
(if i found out the right one i delete the pictures)