hot chips on motherboard

Firestrider · Nov 18, 2008

Here's a picture of the motherboard I have:

What are the chips that particularly get hot when overclocking and should be sinked?

RollingThunder · Nov 18, 2008

Firestrider said:
Here's a picture of the motherboard I have:

What are the chips that particularly get hot when overclocking and should be sinked?

The ones that already have heatsinks on them. Some replace the passive sinks with an active fan. It never hurts to put a fan blowing past your RAMs either, in my case, a low speed quiet 120mm fan from my drive bay.

Firestrider · Nov 18, 2008

What are the pink and green circled ones called? I heard one of these can get hot when overclocking Phenoms.

bing · Nov 18, 2008

Pink = inductor, Green = mosfet

Cool mosfet first since it will impact directly on the power performance when you OC, but if you can cramp those tight area with small sink, the inductor as well since it will be way hotter than mosfet. Although hot inductor has only minimal impact, the problem is they're so hot that it affects the life of the capacitor (rounded silver & blue) that close to them and its toasting those capacitors. Click for an IR example at one of on my sig (Inductors are hotter than mosfet).

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RollingThunder · Nov 18, 2008

bing said:
Pink = inductor, Green = mosfet

Cool mosfet first since it will impact directly on the power performance when you OC, but if you can cramp those tight area with small sink, the inductor as well since it will be way hotter than mosfet. Although hot inductor has only minimal impact, the problem is they're so hot that it affects the life of the capacitor (rounded silver & blue) that close to them and its toasting those capacitors. Click for an IR example at one of on my sig (Inductors are hotter than mosfet).

Great examples Bing!

Firestrider · Nov 22, 2008

Should I sink all the ones in green (I already put minisinks on mosfets for the CPU) just wondering for RAM and NB.

And the one circled in yellow is the NIC... does that get hot?

KosAMD · Dec 14, 2008

I think you're getting a little carried away with sinking everything on the board. I'm assuming your running aggressive air? or water? If so I'd just get the board down in a nice case with some good airflow. You'll spend far more time and money trying to put aluminum or copper on everything than its worth. But if you must, go active cooling on your bridges before you start trying to squeeze heatsinks on your power pieces. To contradict myself, if you do go all out and put heatsinks everywhere, please post pics. I'd love to see them as I'm a huge nerd. GL.

mxthunder · Jan 2, 2009

the fets have been known to catch fire on these boards with the higher Wattage CPU's. check out rebels haven for some good info on this board. I have been hanging out over there a lot lately.

here is a pic of one persons solution

http://www.lejabeach.com/Biostar/TA790GXA2+/Board/TA790GXA2-12.jpg

but im not sure if it is the best because if one of the MOSFETs is a little lower/higher than the rest, it will throw off the contact with the rest of the chips. I plan to futher cut up an old socket a sink and do each one individually.

aja · Jan 2, 2009

Choose passive sinks carefully. Aluminium is usually better than copper for small areas and passive cooling as the copper retains a lot of heat. Use sinks with wide, thick, well spaced fins and a thick base IMO. Easy airflow is more important than number of fins. As bing said, you might hurt temps by adding the sinks.

mxthunder · Jan 3, 2009

stuck my sinks on last night with some A.S. thermal adhesive. I hope they do the trick

2009%5C01%5C03%5Cbikepics-1529211-800.jpg

Blazing fire · Jan 3, 2009

Let's hope he has aluminum ones, and not copper, since copper is very much denser.

Firestrider · Jan 4, 2009

Yeah the sinks I used are aluminum and have good spacing between fins but are not as tall as what mxthunder linked.

mxthunder · Jan 4, 2009

They are aluminum. Did the pic not show up?

hot chips on motherboard

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