Advice needed for cooling this heat-disaster PC down a bit?

Unseul said:
Surely the AIO at the front would dump even more hot air onto the GPUs and VRMs? Sure the CPU itself would be better, but everything else would get hotter.

The bottom left 3rd of your system looks almost completely isolated from airflow, with little space to let any air out. Can you put the hard drive tray at the top? It may seem daft, but it's the GPUs that are pumping out most the heat, so need the cool air circulating, the hard drives at the top would block flow there too, but it may allow for a better flow overall, going from bottom right to top lef, rather than top right to top left at the moment.

Then if you can get/fit a little 90mm fan at the bottom against the empty PCI slots, you could perhaps try and get more exhaust going there. Maybe try moving the system further away from that back wall too, allow the air to escape a bit more easily (probably not an issue, but may help).
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Ideally front is better. Maybe the OP get a different case. The vrms and graphics card would suffer far less than the cpu they would be fine, its a 240mm aio if OP got a different case the 240mm goes up top and then a fan underneath I'm sure you can do that with a different case.

https://www.youtube.com/watch?v=xNAMxZgvves

Are front mounted radiators bad for your PC?

https://www.youtube.com/watch?v=YCZ5iP5cu8g
 
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In general, they probably aren't the worst, but look at his issue.

His issue is the fact that the GPUs are at 100% load basically all the time, as he's folding. The CPU nudges 90C, one of the GPUs is already 94C, that will only get hotter if warmer air is coming in, however, given the OP, I'm guessing it's the GPUs that are the issue, since they're what are mostly in use.

There's absolutely no airflow going past those GPUs, the bottom is cut off by the PSU and the hard drive, the top looks to be blocked by something else (ssd?), so almost none of the PCI slots are actually exposed to allow hot air out. Sort that out, and the GPUs will get cooler, and so will the CPU.

A different case would probably help a lot, a bigger one would mean some airflow could actually go past the GPUs. I still wouldn't put the AIO on the front, since if GPU is the major use, that's what needs to be kept cooler as a primary focus.
 
Hmm, ill try moving the drives. Wherever i put them they will be blocking some airflow though sadly.

The little plastic drive plinth is removable, i could remove that and put the drives where that is, or possibly have them hanging from the ODD bays.

Tbh its the CPU im most concerned about temps wise.

Adding the intake on the side has dropped my top GPU temp by a few degrees. Hard to say how much of an impact exactly, because the ambient temps have dropped now.
 
Acme said:
Hmm, ill try moving the drives. Wherever i put them they will be blocking some airflow though sadly.

The little plastic drive plinth is removable, i could remove that and put the drives where that is, or possibly have them hanging from the ODD bays.

Tbh its the CPU im most concerned about temps wise.

Adding the intake on the side has dropped my top GPU temp by a few degrees. Hard to say how much of an impact exactly, because the ambient temps have dropped now.
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I think in the end, the best solution is a bigger case, that allows the GPUs to get air flow around them. Then even if you have the radiator on the front, you'll be able to get air moving across and out past the GPUs.

I know it won't help you, but I've just bought a 90mm fan that I plan on putting underneath my GPU, exhausting out the PCI slots in order to try and keep cool air moving through the bottom of the case and keeping the GPU well supplied.

EDIT - Currently, if you don't want a new case, then better fans on the front p14 pwms are meant to be very good I believe, will help you a lot. The airflow seems to be mostly aiming for the radiator, so it may not be smart to move those HDDs if it's the CPU you're worried about.
 
I dont want to get a bigger case really, this one is already huge and incredibly heavy when loaded up! Perhaps theres one which is a similar size but with a better internal arrangement? :p

Ill have a look... :)
 
Acme said:
Flipped it around and the top GPU has decreased by about 3 degrees. Thatll do for now while I think about buying fans... :p

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Get another exhaust fan there to help build stable airflow as the 2 GPUs will just be creating a mess of hot air. Any chance of ducting air from the larger, lower intake fan directly towards GPUs instead of into the centre of the volume?

A vertical piece of cardboard wedged between the case floor and the bottom of the 5” drive bay might work. You want to avoid the cool air being pulled out the side before it’s had a chance to take some heat from the GPUs.
 
Air cooled components have almost exactly 1:1 ratio air air temp entering cooler to component temp. Rise air temp 2c and compoent will be 2c hotter.

Using radiator as intake will raise air temp inside of case so GPUs will end up runnign hotter.

Acme;
Your side exhasut fan looks like it's on window. Is it an optical illusion?

What are your intake fans? Many fans don't move much air, and if your's are not high pressure rated they won't be moving much air through case.
 
Using the radiator as intake will raise the air temp inside. Though we make some assumptions saying that.

We assume that people are using capable fans as intake on the front to start with, and that by shifting their radiator, they aren't actually improving their overall intake compared to what they were using. Really, if you're using the same fans, you'd expect to see more air moved into the case without the radiator, as there's less to overcome. But it doesn't seem unreasonable to hope that people use quality fans as intakes in the first place.

Next though, whilst an increase of 1 degree in air temp, leads to near as damnit, a 1 degree increase in CPU/GPU temp. This is going to be true of air being exhausted through a radiator. The opposite cannot necessarily be said to be true.

A 1 degree decrease in CPU temp, will not necessarily lead to the air being brought into the case to increase by 1 degree, that would depend on one main factor I believe, the volume of air passing over the radiator. A larger radiator and/or more powerful fans, will see a drop in temperature for the CPU, but that heat will be dissipate into a large volume of air, and potentially not increase it by a large amount.
 
The fan on the side is an intake blowing over the top GPU at the moment, it made no difference as an exhaust, but as an intake I immediately saw the top GPU temp drop by a few degrees.

The perspex window has been removed, otherwise the fan wouldn't achieve a great deal. :D

Its a cooler day today and my CPU is sitting almost idle browsing forums at 27 degrees!

As for what the fans are:
Front intake 200MM Antec BigBoy 200
Front intake 120MM Xigmatec Orange Line
Side intake 120MM Xigmatec Orange Line
Rear exhaust 120MM Corsair "stock" fan
Top push exhaust 120MM Corsair SP120
Top push exhaust 120MM Scythe SlipStream Slim
Top pull exhaust 120MM Akasa Venom Viper
Top pull exhaust 120MM Akasa Venom Viper
 
No, radiators are not1:1 like air coolers. More like 3:1 or 5:1 .. at least on custom loop or decent AIO copper radiator.

Indeed, lots of variables to play with here. Reality is even a case with very good airflow ends up with air warming up at least 2-3c warmer than room by the time it enters coolers when system is working hard. I can deal with that, but I'm not going to increase it even more by putting a CLC rad cooling only 1 component as intake in system with everything else air cooled air and end up with air being heated up even more before it gets to air cooled components.
 
You could take a decent chunk off your temps by cutting out those fan grilles in the case, they look horribly restrictive and will be causing hot air to spill back into the case.
 
Acme said:
The fan on the side is an intake blowing over the top GPU at the moment, it made no difference as an exhaust, but as an intake I immediately saw the top GPU temp drop by a few degrees.

The perspex window has been removed, otherwise the fan wouldn't achieve a great deal. :D

Its a cooler day today and my CPU is sitting almost idle browsing forums at 27 degrees!

As for what the fans are:
Front intake 200MM Antec BigBoy 200
Front intake 120MM Xigmatec Orange Line
Side intake 120MM Xigmatec Orange Line
Rear exhaust 120MM Corsair "stock" fan
Top push exhaust 120MM Corsair SP120
Top push exhaust 120MM Scythe SlipStream Slim
Top pull exhaust 120MM Akasa Venom Viper
Top pull exhaust 120MM Akasa Venom Viper
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Your pic does look like window is still in it, but I figured it wasn't. :D

200mm Antec Bigboy has very low pressure rating so doesn't flow much (if any) air through grill and filter. I normally use intake fans that are 1300-1500rpm and have a static pressure rating of 1.3+mm H2O. That way even at 800rpm they are able to pull a decent amount of air through grill and filter. I rarely use exhaust fans. Can't remember last time I used one. With good pressure rated intakes and blocking any openings not covered by intake fans in front half of case all the air they push into case has to flow on back to go out other vents.

Are the green strips by GPUs PCie slot covers or part of GPU? If they are covers, I would remove them so heated air coming off of GPU can leave case through them.

If you could mount 2x side intakes side by side pushing air from room toward GPUs it would likely help lower GPU temps.

Link below might be be of interest. It's a basic guide to how airflow works and how to optimize case airflow. It's more for single GPU applications, but still might be of interst.
https://forums.overclockers.co.uk/t...-i-put-my-temp-sensor.18564223/#post-26159770

SilverstoneTek did a study of grill restriction showign they block 29-71% of airflow.
https://www.silverstonetek.com/techtalk_cont.php?tid=wh_chessis&area=usa
 
Thanks, given me lots to think about! The 200mm is stuck on the slow setting too as mentioned previously, so i guess its not achieving much.

The green strips are bits of wall showing through the empty gaps where the pci-e blanks were before i removed them. :p
 
Great minds and all that.

It's hard to cool multiple GPUs stacked up like that. Best bet is probably 2x 120mm side intake pushing cool air directly at them.
 
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