Info 【Caution】Be careful about Dual radiator build

FAhentai

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Jul 3, 2016
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Hi everyone, recently I have done a dual AIO build, 3080ti modified to hybrid AIO (GPU uses watercooling while other parts were windcooled) with a 240 aio radiator and the cpu uses 240 aio cooler as well. That is how graphic card looks like after modification.
https://ibb.co/Lk0fVJg
At the beginning, I thought it can be a very easy job, yet finally turns out, well, it is not the case. The 1st mistake I have made is the case that I used, it is Great Wall M66 ( https://www.bilibili.com/video/BV19M4y1N76e ) As you can see in the link, this case has 340MM allowance,which fits my grahic card. However, since I am going to make a dual AIO build, there is a radiator that must be installed on the front, this space is not enough. The only solution in this case is put either radiator or fan on one side, use the long screw to go through the front part of the case to fix another part of the AIO system, which is a hard job if you have the mother board installed already. Here is how it looks like
Then, I made the 2ed mistake. As you can see on the picture above, on the 2ed radiator that is connected to the graphic card, I made both its fan intaker. This is in fact totally wrong and the worst part of this problem is, you may not realize that you are wrong, untill you pay some exstra attention! At the beggining, I thought I was done and I test the system with Furmark. The result seems to be very good, the grahic stays at 53c when the side panel is not installed and 63C when side panel is installed. Nevertheless, I randomly touched the side panel, and the side panel is made by glass, it was so hot that I can barely touch, which indicates that I was totally wrong, those fans can should not be intaker, they must be belowing out! Finally, I pull everything apart, put the radiator in the front and the fan on its back, removed the dust filter on the front panel and used Furmark to test the system again, the GPU stayed at 65C. The side panel was no longer hot but since the hot air is belowed out from front, when the graphic card gets fully loaded you can feel the smell of plastic gets heated up 🙄 Here are some pictures shows how it looks like.
In conclusion, lesson learnt, if you want to build a dual aio/split water cooling system,
1).make sure that you put all the fans that next to the radiator below out, not intaker!
2). Find the right case. Better both of the radiator stays on the top of the case, like TT CORE V21 (MATX ONLY, WHAT A SHAME) or TT HAF 700. Otherwise, at least a EATX case
I hope this can help all of the rest.
 
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You made all fans as exhaust?
Where is air coming in from?
Air intakes are not dust filtered. You'll get dust accumulation in your system extremely fast.
I forget to say that... I reversed the out exhaust fan on the back of the case and make it intaker. So, yeah, one intaker from the back.
 
It's not that hard. How much planning did you do in advance, and did you take any measurements beforehand? I ask, because - no offense - it seems like this was done more on impulse. If some research was done, it wasn't thorough enough.

1).make sure that you put all the fans that next to the radiator below out, not intaker!
2). Find the right case. Better both of the radiator stays on the top of the case, like TT CORE V21 (MATX ONLY, WHAT A SHAME) or TT HAF 700. Otherwise, at least a EATX case
1)Pardon, but could you try this one again? I'm not sure what this one is saying.
2)I don't agree with this.
Some small cases can definitely do dual AIO systems, and it isn't necessary for 2 AIOs to be at the roof of a case.
Have the least power consuming device(on average) as the intake. This will allow for the lowest possible case ambient.
The other should be the exhaust. Usually, this means the cpu cooler as front intake, and gpu cooler as top exhaust.

IF your case supports it, try vertically mounting the gpu. It'll probably fit better.
I wouldn't even bother with the rear fan. Maybe put a dust filter over it, because the AIO installed in the roof will draw air from that way.
 
It's not that hard. How much planning did you do in advance, and did you take any measurements beforehand? I ask, because - no offense - it seems like this was done more on impulse. If some research was done, it wasn't thorough enough.


1)Pardon, but could you try this one again? I'm not sure what this one is saying.
2)I don't agree with this.
Some small cases can definitely do dual AIO systems, and it isn't necessary for 2 AIOs to be at the roof of a case.
Have the least power consuming device(on average) as the intake. This will allow for the lowest possible case ambient.
The other should be the exhaust. Usually, this means the cpu cooler as front intake, and gpu cooler as top exhaust.

IF your case supports it, try vertically mounting the gpu. It'll probably fit better.
I wouldn't even bother with the rear fan. Maybe put a dust filter over it, because the AIO installed in the roof will draw air from that way.
Of course this is done on impulse. Otherwise how can I make such a mistake by using this case?🤣
1. Have a look with the pictures, at the beggning, I put both fans of the front radiator intaker way, obviously, they are going to blow all the heat back to the case. To make things even worse, think about the position of those fans, the heat is going to hit graphic card back! Thus, I removed the fans and radiators, put the radiator in the front and the fans on its back, make the fans exhauster instead of intaker.
I believe that this applies to all the dual aio/dual radiators build. Unless it is like TT core V21/TT HAF 700, there is always radiator that stays in the front.
2. Of course you can install dual aio/dual radiators build on "normal" cases. However, the problem that I mentioned on above stays unless you make both radiators on the roof.
 
Of course this is done on impulse. Otherwise how can I make such a mistake by using this case?🤣
1. Have a look with the pictures, at the beggning, I put both fans of the front radiator intaker way, obviously, they are going to blow all the heat back to the case. To make things even worse, think about the position of those fans, the heat is going to hit graphic card back! Thus, I removed the fans and radiators, put the radiator in the front and the fans on its back, make the fans exhauster instead of intaker.
I believe that this applies to all the dual aio/dual radiators build. Unless it is like TT core V21/TT HAF 700, there is always radiator that stays in the front.
2. Of course you can install dual aio/dual radiators build on "normal" cases. However, the problem that I mentioned on above stays unless you make both radiators on the roof.
That's why my previous post had this:
"Have the least power consuming device(on average) as the intake. This will allow for the lowest possible case ambient.
The other should be the exhaust. Usually, this means the cpu cooler as front intake, and gpu cooler as top exhaust."

With the current trending components, something is always going to be blowing heat into something. The setup that best avoids this is cpu tower air cooler and gpu blower cooler, inside a case with only front(intake) and rear(exhaust) fans, but no one seems to like it.

Gpus dumping all their waste heat on everything inside the PC is common. Wth the gpu AIO, you have the control to change that. Strongly consider swapping the cpu and gpu radiator positions.
 
That's why my previous post had this:
"Have the least power consuming device(on average) as the intake. This will allow for the lowest possible case ambient.
The other should be the exhaust. Usually, this means the cpu cooler as front intake, and gpu cooler as top exhaust."

With the current trending components, something is always going to be blowing heat into something. The setup that best avoids this is cpu tower air cooler and gpu blower cooler, inside a case with only front(intake) and rear(exhaust) fans, but no one seems to like it.

Gpus dumping all their waste heat on everything inside the PC is common. Wth the gpu AIO, you have the control to change that. Strongly consider swapping the cpu and gpu radiator positions.
In fact I have test the system... It works fine. 65C degree with the GPU with furmark running 30 mins+ , which is 2C higher comparing with intaker fans.
Also, the CPU stress test result (I have had Aid 64, instead I use CPU-Z to test) remains the same. (AMD 5700X, with Themalright Aqua 240).
 
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