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How much value is there to pointing fans straight at your gpu? - Page 2

post #11 of 18
Before waterblocks came out for the Gigabyte 980 Ti G1, I mounted a fan on the back of my hard drive cage, and it blew air between my 2 GPUs setup in SLI. I'm not sure if it made much difference but in my mind it seemed like a good idea since heat rises and it prevented my 1st GPU attracting all the heat from my 2nd GPU.
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post #12 of 18
My old 7950 Tri-fire got pretty hot when oc'ing, putting a few fans on them helped a bit.


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post #13 of 18
Thread Starter 
wow. you really went all out! did it help you over clock?
post #14 of 18
Quote:
Originally Posted by DR4G00N View Post

My old 7950 Tri-fire got pretty hot when oc'ing, putting a few fans on them helped a bit.



Wow! That's some serious ghetto rigging.
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post #15 of 18
Quote:
Originally Posted by Tail Red View Post

wow. you really went all out! did it help you over clock?
Quote:
Originally Posted by rolldog View Post

Wow! That's some serious ghetto rigging.
It helped a bit @ 1100MHz 1.2V, shaved a few degrees off which kept the top card from going over 75c when crunching MilkyWay@Home all day long.

Unfortunately the top card died randomly when I took it out to do some maintenance and the middle card started giving memory errors. The bottom card still works great, I have it in my parents system now @ 960MHz 1.062V w/ a Gelid Icy Vision-A @ 7V and it never goes over 56c in the summer.
Edited by DR4G00N - 10/20/15 at 8:19am
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post #16 of 18
if you really want to stack GPUs, reference coolers work better:


I can run that with the side panel on and keep everything under 70C with the stock fans.


this is what you "need" to do to keep the bottom card from cooking the top card. gotta divert that exhaust and provide the card with cool air.
 
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post #17 of 18
from my experience, if the fan is located at the side panel, exhaust works better than intake.
most GPUs dumps their hot air at the top(towards the side panel), bottom (towards motherboard) or I/O and back (towards the HDDs).
you can technically see where the exhaust goes by looking at the fins on the GPU HSF, if the fins are vertical then its bottom/top, if the fins are horizontal then its rear/front.





if the fan is located at the bottom of the case, intake is favorable but is prone to dusts.
the intake at bottom works well in blowing air directly at GPU intake.
although it does not work well with multi-GPU solution, and cases with bottom fan mounts are rare.





where as front intake thats directly positioned at the GPU and is not obstructed by a drive cage will work best.
Edited by epic1337 - 10/23/15 at 5:42am
post #18 of 18
I'll second (or fourth) that pointing a fan at the backside of the GPUs helps way more than blowing air into the front fans on the GPUs. I've got 2 R9-290x's overclocked and stuffed into an HTPC case with minimal intake (ie none cause I'm planning to water cool,) and I'd had some troubles with them getting hotter than I like (like they don't already run hot heh.) Anyway, I'd put a fan facing the gpu fans thinking I'd pull in more cool air from a small intake window in the chassis, but it didn't bring down my temps at all. Pointing a fan at the backs of the cards dropped 2c of my temps, and that's without even having any front intake slots/vents/holes on my case.
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