Show your PWM cooling

[silverphoenix]

If you don't have stock PWM cooling show it here. From air to water to whatever. I need ideas even DIY. I need to cool my quad GT's pwm without hacking the stock one. I found only one place that sells waterblocks but it will cost me close to 85-90 USD to get it to me. So Post away!!

[celemine1Gig]

Doesn't look too pretty , but it works.

http://www.fh-augsburg.de/~madocer/B...D955XBK016.jpg

[Origin_Unknown]

Originally Posted by celemine1Gig

Doesn't look too pretty , but it works.

http://www.fh-augsburg.de/~madocer/B...D955XBK016.jpg

wow, that looks ghetto.... what was the original heatink that was used?

[xenoasd]

Originally Posted by celemine1Gig

Doesn't look too pretty , but it works.

http://www.fh-augsburg.de/~madocer/B...D955XBK016.jpg

wow pointy. indeed doesnt look pretty lol

[celemine1Gig]

The original board (Intel D955XBK) doesn't use any additional PWM cooling.

Fact is: My solution might not look too shiny, tidy and what not, but it outperforms any of those premade solutions.

Points that most people forget when it comes to PWM cooling:

1.) The Mosfets are normally designed to dissipate the heat into the PCB they're soldered onto, and not into heatsinks that are placed on the plastic package. The heatsinks will help, but not as much as some poeple think they do.
2.) You'll never get close to perfect contact when you try to use one heatsink for more than one FET.
3.) If the PWM designs would be better, we wouldn't need that much PWM cooling in the first place. IMHO, if you'd design a good power regulation circuit that would cost more, you could safe some money on the extreme heatsinks that some companies use ATM (new MSI boards for example with the extreme heatpipe designs). But that's just my 2 cents.

[silverphoenix]

Did you use ceramique adhesive? I would like the option of putting the stock cooling back on. I would like to have individual ones but then I can't clamp them down and probably have to use adhesive.

I have a spare package of thermaltake copper bga sinks but they are quite puny.

[Der_KHAN]

i think the stock heatsink on the quad gt should be enough if u replace the thermal pad with some ceramique

[Nosfer@tu]

Originally Posted by celemine1Gig

The original board (Intel D955XBK) doesn't use any additional PWM cooling.

Fact is: My solution might not look too shiny, tidy and what not, but it outperforms any of those premade solutions.

Points that most people forget when it comes to PWM cooling:

1.) The Mosfets are normally designed to dissipate the heat into the PCB they're soldered onto, and not into heatsinks that are placed on the plastic package. The heatsinks will help, but not as much as some poeple think they do.
2.) You'll never get close to perfect contact when you try to use one heatsink for more than one FET.
3.) If the PWM designs would be better, we wouldn't need that much PWM cooling in the first place. IMHO, if you'd design a good power regulation circuit that would cost more, you could safe some money on the extreme heatsinks that some companies use ATM (new MSI boards for example with the extreme heatpipe designs). But that's just my 2 cents.

You MODDED THE OUT THAT BOARD

[silverphoenix]

Originally Posted by Der_KHAN

i think the stock heatsink on the quad gt should be enough if u replace the thermal pad with some ceramique

it is but it's also connected via heatpipe to the NB heatsink, which is being replaced with an MCW30, I don't want to cut the heatpipe and void warranty. I have an old socket A glacialtech hsf I can try to modify. Do you guys think the TT BGA ramsinks are enough? I've read posts about how even the swiftech BGA sinks aren't enough.

[celemine1Gig]

Originally Posted by silverphoenix

Did you use ceramique adhesive? I would like the option of putting the stock cooling back on. I would like to have individual ones but then I can't clamp them down and probably have to use adhesive.

I have a spare package of thermaltake copper bga sinks but they are quite puny.

I used my own thermal adhesive. You just have to mix two component epoxy 1:1 with thermal paste (not any, is appropriate!). There's nothing wrong with using the stock cooling, as long as the temps are OK. I modded my D955XBK as seen in the pics, because the PWM got really hot without cooling. And I don't like the fact that the PWM heats up all the other components.

Those BGA heatsinks look too small, and copper isn't really the best chioce for this application. Those tiny copper sinks would heat up horribly fast and without active ventilation they'd probably worsen the cooling situation, instead of improving it.
I'd advise you to not use these little sinks.

Originally Posted by Nosfer@tu

You MODDED THE OUT THAT BOARD

Yeah, you could probably say that. Didn't want to brag about it. Especially because I didn't really have the time to test the boards potential, yet.
BTW, this is a Intel Engineering Sample board. Intel 955x ES and ICH7R with "SECRET" printed onto it.
Hope to finally get a Conroe/Allendale soon, to really be able to test the board. Did I say "option to choose 400MHz default FSB"?

[silverphoenix]

Like I said before I don't want to permanently attach them. The TT ramsinks do have thermal tape on them, and there will be a fan sitting right on top of them. I will try to mod the old alu socket A hsf.

[Stocky]

This is what I bodged together for my QuadGT a little while back:



It doesn't look too bad, but the PWMs still get extremely toasty!

OT: Does anyone else hear clicking sounds (a bit more squeaky than a HD)from that area of the mobo?

[silverphoenix]

what is that?

[celemine1Gig]

Originally Posted by silverphoenix

Like I said before I don't want to permanently attach them. The TT ramsinks do have thermal tape on them, and there will be a fan sitting right on top of them. I will try to mod the old alu socket A hsf.

And like I said, there's nothing wrong with using the stock PWM cooling, which also means using the stock mounting, which I assumed to be some kinda bolts and springs and thermal paste between the fets and the heatsinks. All assuming that the temps are at an OK level.

Originally Posted by Stocky

This is what I bodged together for my QuadGT a little while back:

[/IMG]http://www.killsound.com/forum/PWM%20Mod.jpg[/IMG]

It doesn't look too bad, but the PWMs still get extremely toasty!

OT: Does anyone else hear clicking sounds (a bit more squeaky than a HD)from that area of the mobo?

Did you ever check the fets temps before and after the mod? As I wrote above: Using full copper heatsinks for this application is kinda bad in most cases.

[silverphoenix]

Originally Posted by celemine1Gig

And like I said, there's nothing wrong with using the stock PWM cooling, which also means using the stock mounting, which I assumed to be some kinda bolts and springs and thermal paste between the fets and the heatsinks. All assuming that the temps are at an OK level.





Did you ever check the fets temps before and after the mod? As I wrote above: Using full copper heatsinks for this application is kinda bad in most cases.

I can't use stock fet cooling, it is physically soldered to a heatpipe to the NB, which get's wayy to hot when I'm overclocking. So I need something to replace the stock setup.

I'm gonna actually try something, if it works I'll show you guys hehe.

[Navig]

Here's my HR-09 on an IN9 (start post#47). This is a bit of a special case--the PWM chips are extremely fragile.

Otherwise, I'd recommend, as above, cutting up a standard heatsink, and applying a single heatsink per mosfet.

[jarman]

I like that Navig