I have a case where the gpu gets it's air straight from a vent on the side. I'm thinking about adding two 140mm fans so that they blow air straight at the gpu/gpu fan shroud. But is there any real value to this? would cooling really be improved? I mean,the gpu already has two small fans blowing air across the fins of the cooler. Is there an ideal distance that should be left between the gpu fan shroud and fans blowing air into the case?
How much value is there to pointing fans straight at your gpu?
Tail Red
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I have a case where the gpu gets it's air straight from a vent on the side. I'm thinking about adding two 140mm fans so that they blow air straight at the gpu/gpu fan shroud. But is there any real value to this? would cooling really be improved? I mean,the gpu already has two small fans blowing air across the fins of the cooler. Is there an ideal distance that should be left between the gpu fan shroud and fans blowing air into the case?
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4,779 Posts
place a fan facing up of the deck of your case if you can - i have used Velcros before now, thick heavy duty. Or you could get a little 80mm fan and silicon to the back somehow. The silcon wont hurt, peel it off if a no go. Ingenuity - that's all it takes.
I have a fan siliconed to my FT03 case
![thumb.gif]( "thumb.gif")
example on another build -
I have a fan siliconed to my FT03 case
example on another build -
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6,057 Posts
What I've done with fans and GPUs is placing an intake fan above the PCI bracket so that it blows over the back of the card. This really helps with VRM temps. Even now I have a fan positioned over both my GPUs so that the cool air is blown directly over all VRM areas. Temps are a good 40oC lower than with no fan when I'm overvolting the cards - 55oC instead of 95oC.
I may be able to find and post a pic in about 30 mins.
I may be able to find and post a pic in about 30 mins.
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6,057 Posts
I didn't find one.
It is leaned against the fittings, resting on the blocks and power cables which tilt the fan enough to push the warm air out.
It is leaned against the fittings, resting on the blocks and power cables which tilt the fan enough to push the warm air out.
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4,779 Posts
just see where a certain size fan fits and try
Ii myself with next card if i ever game again gonna put 4 dollops of silicone on back plate of gpu then whilst hardening carefully place fan on top or create spacer and then let dry.
![thumb.gif]( "thumb.gif")
Now kids, vote who done the best drawing
![biggrin.gif]( "biggrin.gif")
Ii myself with next card if i ever game again gonna put 4 dollops of silicone on back plate of gpu then whilst hardening carefully place fan on top or create spacer and then let dry.
Now kids, vote who done the best drawing
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1,179 Posts
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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Quote:
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.
Quote:Originally Posted by Tail Red
wow. you really went all out! did it help you over clock?
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.Originally Posted by rolldog
Wow! That's some serious ghetto rigging.
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.
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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.
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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7,566 Posts
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.
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.
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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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