What mofsets to cool?

[joeyddr]

on a p4c800-ed what are usually "the" mofsets to be putting a HS on ?

[Jupiler]

I putted some small sinks on the mosfets right above and left of the socket, and one on the clockgen.
P4C800-ED too.

[joeyddr]

got a pick of the clockgen?

[Jupiler]

Nope, but is left from the NB cooler.
Can't see it right now, as i'm typing on other rig.
Will check tomorrow.

[PTK]

Any comment did adding those HELP at all ? ;)

PTK

[Jupiler]

I don't know if they really help or not. ;)
As you know, voltages jump up and down on this board, and I don't wanna do the drop mod again, already killed 1 board. :(
Actually, on my IC7-G, the mosfets never get warm, maybe because i have some good airflow in my case.

[TheDude]

Make sure you sink the PLL also...gets very hot

[lalPOOO]

Probably the mosfet below the agp slot. On my IC7 its a scorcher even at stock voltage powering just a geforce2mx400.

[IvanAndreevich]

Can anyone CONFIRM an increase in overclocking ability of your MOBO after you sinked the MOSFETS?

[toolbox]

Ivan, keeping something cool, especially something that controls the power is a good idea :) Its just an extra step to maybe sqeeze out 1mhz.

[a5h]

it will increase stability for the least

[Farbror]

U can always build your on OTES cooling..........:rolleyes:

[joeyddr]

ok i put one on the clockgen added one to the southbridge. Where is the pll ?

[R.Rabbit]

just feel all the chips on your mobo when its on and put sinks on the hot ones

[OwcA]

PLL = clockgen ;)

[joeyddr]

ok got that one covered then. I guess next would be the one near the agp slot, how bout the ones near the mem?

[Jupiler]

You can add some sinks to them as well, depends if they get hot or not. I don't have them covered, only the 2 ones between the socket and the 1st memory slot. (a little bit under the ATX 12V 4-pin connector)

[Craig]

joeyddr,

It would be nice if you test for your max O/C before you go further.

Then go ahead and sink the mosfet at the agp, RAM and the main board cluster of mosfets to the left of the CPU socket.

Along with the two you've done, that should about do it. Then test again for max. O/C and see what gains you've made.

It would be a interesting comparission if you'll take the time to do it.

[IvanAndreevich]

toolbox
a5h
I know the idea behind it, I was looking for some actual results.

[joeyddr]

gonna do the rest this weekend and i'll report back to you guys.

[dobbz]

Originally posted by IvanAndreevich
Can anyone CONFIRM an increase in overclocking ability of your MOBO after you sinked the MOSFETS?

yes, sir. ill confirm it. i thought i had my max stable FSB with 250 @ 3.5v. 255 was flakey, 260 would boot but wouldnt run Prime at all. i tried for days just to get 260 to Prime half an hour, but never got five seconds. tried driving strength, slew rate, 3.6v, and nothing worked except CL3.0 but mem bandwidth was the same as 240 at CL2.0, so fak that.

then i got OCZ ramsinks onto the mosfets below the DIMM area and i got 255 12+ hours stable, and now 260 will go for around 1.5 to 2 hours. i cant quite get anything to work at 265 yet.

here are the little sinks im using. i had to hack one in half to fit em all under the slots. you'll need two sets- one for the DIMM mosfets and one for the CPU's.

http://store.yahoo.com/svcompucycle/cobgarachhe.html

edit: course this all depends on your board, and if your mosfets are even hot. the nFII's are firey little fkrs for sure. they burn.

[IvanAndreevich]

dobbz
Very nice, thanks for your post!

[dobbz]

course that 260 deal got me into this problem tonight:

http://www.xtremesystems.org/showthread.php?s=&threadid=32341