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Cooling VRM with 80mm fan vs 120mm fan

post #1 of 6
Thread Starter 
Right now my VRM's are getting a tad hot and throttling my card (560Ti) when im pushing max stock voltage 1.15v; my core temps stay under 65C on full load but i feel like the VRM's are just getting too hot and causing the crashes/my card to throttle

I have an 80mm Noctua fan on top of my VRM's but i was thinking of probably replacing it with a 120mm fan ? Since i am not exactly cooling a radiator; would a high static pressure fan still be good for cooling the copper heatsinks? Does high CFM really matter? I was planning on getting this fan

http://www.newegg.com/Product/Product.aspx?Item=N82E16835426015

and mounting it on top my VRM's... will this make a difference on heat dissipation than compared to the 80mm fan? the 80mm fan is currently running at 100% RPM (and is pretty inaudible - compared to my other fans)

I am also in the process of ordering some Fujipoly thermal pads (the 11w/mk) ones to fit in replace the stock thermal pads under the stock heatsinks on the VRM's... since the stock thermal pads are starting to look all funky

Right now i am doing the dwood mod with the H60 block on my GPU, and a fan on top of my VRM's.
post #2 of 6
I'd say 80mm would be better. No deadspot, or at least its smaller.

How hot is too hot to you? under 90C under full load is fine.
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Yesz
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post #3 of 6
Thread Starter 
Quote:
Originally Posted by FlashFir View Post

I'd say 80mm would be better. No deadspot, or at least its smaller.

How hot is too hot to you? under 90C under full load is fine.

too hot = my graphics card throttling despite being under 65C on my core temp

I dont think its my core temps; so the next culprit would be my VRM's? I am overclocking; so the VRM's should be the ones getting really hot.
post #4 of 6
hwinfo how hot.

saying "too hot generally speaking but i don't know the temps" is not good. 80mm > 120mm. doesn't need too much
www.overclock.net/t/943109/about-vrms-mosfets-motherboard-safety-with-125w-tdp-processors/0_100

he was saying a spot cool fan is ok. nojt gonna make a huge difference. you're asking if its a waste of time and i say so.
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post #5 of 6
My buddy got some Silverstone penetrators and I actually love them......... If I didn't already some solid fans with proper color schemes I would look at them if I needed some for pure air. Plus their video is pretty unique.

Newegg Link

And Vid Warning: Spoiler! (Click to show)

Edited by Junkboy - 3/20/13 at 5:34pm
Ada
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Ada
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post #6 of 6
Thread Starter 
Quote:
Originally Posted by FlashFir View Post

hwinfo how hot.

saying "too hot generally speaking but i don't know the temps" is not good. 80mm > 120mm. doesn't need too much
www.overclock.net/t/943109/about-vrms-mosfets-motherboard-safety-with-125w-tdp-processors/0_100

he was saying a spot cool fan is ok. nojt gonna make a huge difference. you're asking if its a waste of time and i say so.

There is no VRM temp sensor on the 560Ti. Doesnt even show up on GPU-Z. Im just trying to cover all of my bases; i took off the stock heatsinks with the stock pads and replaced them with low profile copper heatsinks and Sekisui Thermal tape, but my video card temps actually increased about 5-6C degrees, so my assumption is that it could be the VRM's... So im going to return the stock heatsink that came with the card and my Fujipoly Thermal pads are coming in the mail from frozencpu so ill need to try that out too.

Would it be a bad idea if i stuck on a copper heatsink on the stock VRM heatsink (where there arent fins) ? -- its an aluminum heatsink.... doesnt have too many fins on it.... i'd say only 2/3's of the aluminum VRM heatsink has fins on em. the rest is flat...





Also have this weird problem of my card reading the clocks i set; but in GPU-Z and in Afterburner; the clock never gets past 999.8 (in GPU-Z) and 1000 (in afterburner) -- will need to figure that out later....

My temps are well under NVidia's specs of 98C for the card itself, i dont even hit 70....

What else could be getting really hot?
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