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Hot!3080 FTW3 Hybrid mounting location

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Dabadger84
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Re: 3080 FTW3 Hybrid mounting location 2021/02/03 19:49:47 (permalink)
Changing the intake air temp of a radiator by a few degrees isn't going to straight translate to an increase of the same amount on the GPU die, pretty sure about that.  Even on a 240mm radiator.  
At some point I'll run my GPU radiator outside my case vs top mounted exhaust just to show the temp differences and how little they are.  For now, thank you for proving my point I.E. the GPU radiator spews lava air in comparison to a CPU radiator, so it's better if you only have the option of having one or the other as intake, to have the CPU radiator as intake, when it comes to the rest of your system's temperatures - while it is sacrificing "a few degrees" on your GPU temp, it's saving the entire rest of your system from dealing with 32-40C air depending on the clocks you're pushing and how warm your ambient is.

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#31
kevinc313
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Re: 3080 FTW3 Hybrid mounting location 2021/02/03 20:12:58 (permalink)
Dabadger84
Changing the intake air temp of a radiator by a few degrees isn't going to straight translate to an increase of the same amount on the GPU die, pretty sure about that.  Even on a 240mm radiator.  
At some point I'll run my GPU radiator outside my case vs top mounted exhaust just to show the temp differences and how little they are.  For now, thank you for proving my point I.E. the GPU radiator spews lava air in comparison to a CPU radiator, so it's better if you only have the option of having one or the other as intake, to have the CPU radiator as intake, when it comes to the rest of your system's temperatures - while it is sacrificing "a few degrees" on your GPU temp, it's saving the entire rest of your system from dealing with 32-40C air depending on the clocks you're pushing and how warm your ambient is.




OK buddy. You're comparing a GPU chip running at ~300w+ (chip only) plus vram at ~90w+ with a CPU running at 42w (max during test) and 1000RPM fans on a 280mm AIO.  Right. 
 
And yes, delta-t does translate because basic thermodynamic supersedes your handwaving, I would obviously expect an increase to the chip temp comparable to the change in intake air on the rad.  Additionally I'm reading 28C at the bottom of the case, from the CPU AIO, best case scenario, before any heat from VRM's or ram.  With nearly no load.  5C hotter on exhaust air is a very conservative estimate, it's probably higher.  Not everybody has a wide open case like you do with unrestricted intake air flow.
 
Circulating air in the 30's is not going to kill a PC or have a significant performance impact.
post edited by kevinc313 - 2021/02/03 21:34:11
#32
kevinc313
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Re: 3080 FTW3 Hybrid mounting location 2021/02/22 11:19:51 (permalink)
I've built an internal duct from a 2 liter bottle to direct air from the top intake Hybrid AIO to the back of the case, rear exhaust fan.  Unfortunately it appears to be too restrictive, too small and a hard 90 degree turn to the air flow, GPU temps went up from 54C to 62C on the max fan 445W 10 minute test, but some of that is having the PC in a different spot with 1C higher ambient temps.  23.5C case intake, case 38C exhaust measured with uncalibrated thermocouple probe. RAM temps are about 8-10C cooler, system temps and VRAM a few degrees cooler, so certainly an improvement there.
 
Think I'm going to take the duct off, test again, then flip the fans to top exhaust and try to fit another intake fan somewhere in the case. 
post edited by kevinc313 - 2021/02/22 11:28:02
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kevinc313
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Re: 3080 FTW3 Hybrid mounting location 2021/02/23 09:17:37 (permalink)
Removed the internal duct, flipped the hybrid rad fans to top exhaust, then ADDED THREE 120mm intake fans in the case bottom and front bottom.  53C in 445W Furmark after 10 minutes, but even better, 55C with normal gaming fan speed.  Internal temps very cool with the case being flooded with intake air.  So obviously if you're going to run a top exhaust, make sure you get tons of intake air flow.
 
Clearly its an issue of air flow rate vs. air temps, both are very important but only temps are easy to measure.  With the duct I was getting very poor flow, as if I was only running a weak single sided fan on the rad, even though I was getting direct cool air.  Switching around to having 7 fans creating internal case pressure (minus one exhaust), then having the push pull fans exhausting that through the top rad, creates a far higher flow rate, even if the air temps aren't the best.  Optimally you want abundant unrestricted cool air, which is why people run large external radiators.
post edited by kevinc313 - 2021/02/23 19:19:12
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mech9t5
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Re: 3080 FTW3 Hybrid mounting location 2021/02/23 09:48:32 (permalink)
kevinc313
Removed the internal duct, flipped the hybrid rad fans to top exhaust, then ADDED 3x 120mm intake fans in the case bottom and front bottom.  53C in 445W Furmark after 10 minutes, but even better, 55C with normal gaming fan speed.  Internal temps very cool with the case being flooded with intake air.  So obviously if you're going to run a top exhaust, make sure you get tons of intake air flow.


What case do you have? I have the Lian Li O11D XL.  Right now I have my Corsair AIO (3-120mm) as intake on the side, 3-120mm fans (intake) at the bottom, 1-120mm fan (exhaust) at the back and 3090 hybrid (exhaust) top and 1-120mm fan (exhaust) at the top.

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#35
kevinc313
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Re: 3080 FTW3 Hybrid mounting location 2021/02/23 09:56:31 (permalink)
mech9t5
kevinc313
Removed the internal duct, flipped the hybrid rad fans to top exhaust, then ADDED 3x 120mm intake fans in the case bottom and front bottom.  53C in 445W Furmark after 10 minutes, but even better, 55C with normal gaming fan speed.  Internal temps very cool with the case being flooded with intake air.  So obviously if you're going to run a top exhaust, make sure you get tons of intake air flow.


What case do you have? I have the Lian Li O11D XL.  Right now I have my Corsair AIO (3-120mm) as intake on the side, 3-120mm fans (intake) at the bottom, 1-120mm fan (exhaust) at the back and 3090 hybrid (exhaust) top and 1-120mm fan (exhaust) at the top.




Lian Li Lancool mesh.  CLC 280 front push pull intake, 3080 FTW3 Hybrid top exhaust push pull, two 120 bottom deck intake, 120mm bottom front intake, 120mm rear exhaust. 
 
Previously had the top hybrid intaking and also did about 54C with the same test, BUT with three less fans and much higher temps on the PC internals.  For example, VRAM only got up to like 86C or 88C vs. like 100C before.
 
Since you have the 011, I'd try switching the Corsair to exhaust, block off the single top exhaust, turn down the rear exhaust, max out the bottom fans.
post edited by kevinc313 - 2021/02/23 11:27:45
#36
mech9t5
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Re: 3080 FTW3 Hybrid mounting location 2021/02/23 10:18:12 (permalink)
kevinc313
mech9t5
kevinc313
Removed the internal duct, flipped the hybrid rad fans to top exhaust, then ADDED 3x 120mm intake fans in the case bottom and front bottom.  53C in 445W Furmark after 10 minutes, but even better, 55C with normal gaming fan speed.  Internal temps very cool with the case being flooded with intake air.  So obviously if you're going to run a top exhaust, make sure you get tons of intake air flow.


What case do you have? I have the Lian Li O11D XL.  Right now I have my Corsair AIO (3-120mm) as intake on the side, 3-120mm fans (intake) at the bottom, 1-120mm fan (exhaust) at the back and 3090 hybrid (exhaust) top and 1-120mm fan (exhaust) at the top.




Lian Li Lancool mesh.  CLC 280 front push pull, 3080 FTW3 Hybrid exhaust push pull, two 120 bottom deck intake, 120mm bottom front intake, 120mm rear exhaust. 
 
Since you have the 011, I'd try switching the Corsair to exhaust, block off the single top exhaust, turn down the rear exhaust, max out the bottom fans.


Thanks, I'll try that out.
post edited by mech9t5 - 2021/02/23 10:49:57

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#37
fugly16
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Re: 3080 FTW3 Hybrid mounting location 2021/02/23 10:29:47 (permalink)
Rbk_3
kevinc313
Its all those silly rgb fans driving up your temps.


Dabadger84
kevinc313
Its all those silly rgb fans driving up your temps.



lol - you lost all credibility you might've had with that one.  That makes zero difference with the amount of airflow in my case, temps do not change if the RGB is on or off, nor do temps change in any meaningful way if the radiators are NOT in the case.
 




I don't think I have ever seen sarcasm fly over someones head quite like this. 




I know we're joking here but I actually did have to RMA my H100i because turning the RGB on with the fans would make the coolant temps jump like 15C.  It was weird.    
#38
kevinc313
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Re: 3080 FTW3 Hybrid mounting location 2021/02/23 11:03:33 (permalink)
mech9t5
kevinc313
mech9t5
kevinc313
Removed the internal duct, flipped the hybrid rad fans to top exhaust, then ADDED 3x 120mm intake fans in the case bottom and front bottom.  53C in 445W Furmark after 10 minutes, but even better, 55C with normal gaming fan speed.  Internal temps very cool with the case being flooded with intake air.  So obviously if you're going to run a top exhaust, make sure you get tons of intake air flow.


What case do you have? I have the Lian Li O11D XL.  Right now I have my Corsair AIO (3-120mm) as intake on the side, 3-120mm fans (intake) at the bottom, 1-120mm fan (exhaust) at the back and 3090 hybrid (exhaust) top and 1-120mm fan (exhaust) at the top.




Lian Li Lancool mesh.  CLC 280 front push pull, 3080 FTW3 Hybrid exhaust push pull, two 120 bottom deck intake, 120mm bottom front intake, 120mm rear exhaust. 
 
Since you have the 011, I'd try switching the Corsair to exhaust, block off the single top exhaust, turn down the rear exhaust, max out the bottom fans.


Thanks, I'll try that out.




Yeah, no idea if it will do better.  Just something to try.  Sounds like your current config would give more air flow through the top rad, but making the CPU exhaust would mean the top rad got cooler air but less flow.  But keep in mind rads are very obstructive, especially without push pull.
post edited by kevinc313 - 2021/02/23 11:17:21
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kevinc313
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Re: 3080 FTW3 Hybrid mounting location 2021/02/26 07:41:14 (permalink)
Having really good results with the additional fans and top exhaust, evidently having SEVEN fans pressurizing the case overcomes any issue with interior air temps.  Had a chance to play some RDR2 in 4K VRR, 400-420w sustained, rad fans powered external to card with case fan hub, was seeing 53C-55C.  STEEP runs at about 350-375w and 50C.  CPU was at about 50-75w, coolant temp only went up like two degrees.
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