QUOTE(-pWs- @ Jan 2 2008, 01:39 PM)
@ongbs
If my PWM area nvr cool by HS and fan, will it be a problem??
Thanks
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-pWs-sorry bro pws, me just free to online now

will attach my screeny soon ...
Added on January 3, 2008, 12:41 amQUOTE(CV6149 @ Jan 2 2008, 02:28 PM)
for your case I think shud not be a problem.Since the heatsink fan does circulate the air around.
Add 1 more fan 12cm for exhaust la bro...For wc guy,shud have some prob with it since no fan to give some air to pwm....
buy the small2 heatsink from Lelaman(cheap) in sales and use it on ur pwm.
PWS,
seems like bro CV aldy answered yr question
ya, if using WC becareful on the PWM side, especially when running orthos.
If my memory serve me right, u told me b4 u RMA yr mobo twicw due to Orthos right?
My DFI rig was busy running Orthos@ 3.4G, 1.575Vcore for whole afternoon...
refer CPU-Z for my setting....will let u know why I added the heatsinks

Pls refer to your mobo pic, I highlighted the PWM MOSFET where I attached my digital thermal probe.
I am running WC, with my setting as shows by CPU-Z.
(Ambient temp around 26C in air-cond room, my rig is put outside of casing, ventilation is better than opened case)
All my PWM MOSFETs got small copper heatsinks on it, without top 120mm fan running, the Idling temp around 50C+.
Once running orthos, around 10 mins later the MOSFETs temp will shoot up >90C.
Keep in mind that PCB is quite good at heat transfer (due to the copper trace, especially on the packed PWM side, thicker trace found due to high current load)
Those 90C+ heat will transfer to surrounding components (mostly via convection I believe), so think by yourself what is the CAPs temp look like?
At this time those heatsinks I stuck on top of CAPs, temp >65C cos I can't even rest my hand on it >10 sec!!!
Well, I think it is time to turn on my 120mm fans on top of PWM circuit....
Within 1 min my temp measuring point drop to <60C
Those heatsinks on top of CAPs <40C.
So conclusion is I will never run orthos test >1hr without extra cooling
Although those electrolyte CAPs are designed to stand around 100C, judge your self will the lifespan of mobo drop without extra cooling?
Heatsinks might not be necessary but extra fan to me is a MUST when running Orthos >1hr.
Hmm...time to stop my Orthos now and check how is the temp look like
After 2 mins the temp measured below 40C with the 120mm fan running
I treated my mobo nicely with extra cooling since Socket A platform and me used > 4 mobos for the last 5 yrs (3 mobo were Abit NF7-S V2.0).
2 of the NF7 kong due to stupid lighting kissed my mobo via LAN/ phone line. The other mobos still working till recently I sold it off)
OK, time to surf Garage Sales.....
This post has been edited by ongbs: Jan 3 2008, 01:41 AM Attached thumbnail(s)