IC7-G mosfets and high vcore heat issue

[Byron]

Hello guys,
Ok now that i found my own path to overclock my system (IC7-G, 3.2E P4) at 4.16Ghz on water and 1.53vcore (there abouts, readings from CPU-Z) at idle the vcore mosfets are ok. But, when i run prime95 the mosfets are getting VHOT, while vcore drops from 1.53 or whatever.. down to 1.45-7v, and last time i noticed that the soldering from one mosfet was literally in liquid form! i was touching the mosfet, pressing it down and could see the solder moving!
So, next move it to add a fan on top of my cpu block to cool them down, just wondering if you guys had any similar problem with this motherboard and mosfet cooling? if you've done any mods please post pics!

Thanks,
Byron

P.S.: Now i know why Abit came up with the IC7 MAX3... :D

[OneyedK]

I cannot post pictures since I don't have the board anymore, but I experienced the same problems with ad PIV2.8E@3.8 on that board...

Don't worry about the "solder" becoming liquid, since it's low-temperature-solder, I'd rather call it "metallic glue" ;-)
Simply buy some ramsinks and glue the on the mosfets...
While you're at it, glue one on the PWM-chip too...
Next thing I did was putting a 120mm Titan (1500rpm) in the sidepanel of my case that blowed right over the cpu-mosfet-area...

It helped... But I didn't try more and changed the board for a P4C800 E deluxe... It really was a change, I did the vdroop-mod on that new board and vcore was stable after that... Mosfets were cool enough... But I didn't get a higher OC on that cpu... So I guess I could have simply kept the IC7-G :rolleyes:

--> btw, friends of mine with Max3's just had more noise, not better performance :eek:

[Byron]

Could you tell me where is the PWM chip???
Basically solder melts at about 150oC's so most possibly it had reached that much...
The Asus motherboard doesn't have those issues with vcore then? do the Asus mosfets get as hot as the IC7's?

Thanks :D
B

[OneyedK]

It's not normal solder, the one they use to fix mosfet's melts at 70-100°C...

ASUS has a different problem with the same effect.
There it's not the heat, but an Intel-design-error ;-)
So you just have to lie the voltage regulator and all's well...
It's called "vdroop mod".

atm, I'm online with my old PI 200MMX so I cannot access my serial ata disks where my pictures and other stuff is on...
2night, I'll mount my P5AD2-i560 combi, will be having the information then (if I don't screw up the board with as5 on north- and southbridge).

But check this in the meantime: http://www.xtremesystems.org/forums/showthread.php?t=37197&page=1&pp=2

[OneyedK]

btw, the "Intersil" is the chip I was talking about (the one that can use some cooling)

[Byron]

Yeah, a pic would be good about where this chip is located on the IC7 ;)

Thanks for the linky :)

[OneyedK]

:stick: follow the link to see the pic :D

[Byron]

Ah, sorry about that thought you meant the chip for the PWM, that's the one im looking for, except if we are talking about the same chip on that pic :D?

P.S.: if that is the PWM chip then i've a heatsink on it, get a bit hottie :cool:

[OneyedK]

Yups, that's the one...