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Removing side panel lowers GPU temperature despite having good airflow

Lare111
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My PC case is Phanteks P300A. It actually has great airflow thanks to the mesh front panel. I have 3 x Be Quiet! Silent Wings 3 PWM 120mm fans running at fixed 1000RPM. They are very quiet and also perform well as an intake fans thanks to the high static pressure rating. The problem is that if I remove the side panel, GPU temperature drops from 75C to 70C and fan RPM from 1700RPM to 1500RPM. That's actually quite a big drop and also it reduces noise levels.

 

Does this happen because my case is so small? There isn't a very big cap between the GPU and glass side panel. My GPU also pushes all hot air through it's side and I have a feeling that it starts to recirculate it's own hot air due to cramped space. I tried running all case fans at maximum RPM, added additional top exhaust and removed the front panel. CPU temps dropped significantly but there was no difference in GPU temperatures. So the problem doesn't seem to be with the case fans.

 

The GPU is an Asus Dual RTX 3060 Ti OC Edition. And yes, that big CPU cooler might not be good for the GPU airflow but my i7 11700F is a furnace.

 

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Intel Core i5 9700K 5.0Ghz / Gigabyte Z390 M Gaming / 16GB DDR4 3600Mhz CL16 /  Sapphire Pulse RX 5700 8GB GDDR6   /  WD Blue SN550 1TB / Crucial MX500 500GB / Corsair RM550x / Fractal Design Define Mini C TG / Windows 10 / 

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Warm air most likely get stuck here
 image.png.2de63f1a52af6bda6e6d4b9af0a53d0f.png

Try remove the 3x PCI brackets under the graphics card and see if that helps - while having the side panel on 

MOBO: ASUS ROG STRIX Z370-F Gaming   CPU: Intel Core i7-8700K@4.7GHz, -0.095mV (Custom IHS, LM)   GPU: ASUS ROG STRIX RTX 3080 Ti OC LC@2130MHz + 20Gbps MEM OC 

RAM: G.SKILL TridentZ RGB 4x8GB@3700MHz, 16-16-16-36, 1.35V   NVMe SSD: Samsung 970 EVO Plus 1TB   #1 SATA SSD: Crucial MX500 2TB   #2 SATA SSD: Crucial MX300 1.05TB

PSU: Corsair HXi 1200W 80-PLUS Platinum   CASE: Corsair iCUE 7000X RGB   MONITOR: Samsung 49" Odyssey CRG9 QLED 5120x1440p   SPEAKERS: Corsair SP2500 + FX Audio DAC-X6

 

Full specs and setup on my profile-page

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Cards like this blow warm air out from the top and bottom of the heatsink, i.e. towars the motherboard and case side panel. No amount of airflow can fix a side panel that is blocking air by sitting right on the air's path.

CPU: i7-2600K 4751MHz 1.44V (software) --> 1.47V at the back of the socket Motherboard: Asrock Z77 Extreme4 (BCLK: 103.3MHz) CPU Cooler: Noctua NH-D15 RAM: Adata XPG 2x8GB DDR3 (XMP: 2133MHz 10-11-11-30 CR2, custom: 2203MHz 10-11-10-26 CR1 tRFC:230 tREFI:14000) GPU: Asus GTX 1070 Dual (Super Jetstream vbios, +70(2025-2088MHz)/+400(8.8Gbps)) SSD: Samsung 840 Pro 256GB (main boot drive), Transcend SSD370 128GB PSU: Seasonic X-660 80+ Gold Case: Antec P110 Silent, 5 intakes 1 exhaust Monitor: AOC G2460PF 1080p 144Hz (150Hz max w/ DP, 121Hz max w/ HDMI) TN panel Keyboard: Logitech G610 Orion (Cherry MX Blue) with SteelSeries Apex M260 keycaps Mouse: BenQ Zowie FK1

 

Model: HP Omen 17 17-an110ca CPU: i7-8750H (0.125V core & cache, 50mV SA undervolt) GPU: GTX 1060 6GB Mobile (+80/+450, 1650MHz~1750MHz 0.78V~0.85V) RAM: 8+8GB DDR4-2400 18-17-17-39 2T Storage: 1TB HP EX920 PCIe x4 M.2 SSD + 1TB Seagate 7200RPM 2.5" HDD (ST1000LM049-2GH172), 128GB Toshiba PCIe x2 M.2 SSD (KBG30ZMV128G) gone cooking externally Monitor: 1080p 126Hz IPS G-sync

 

Desktop benching:

Cinebench R15 Single thread:168 Multi-thread: 833 

SuperPi (v1.5 from Techpowerup, PI value output) 16K: 0.100s 1M: 8.255s 32M: 7m 45.93s

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27 minutes ago, BetteBalterZen said:

Warm air most likely get stuck here
 
Try remove the 3x PCI brackets under the graphics card and see if that helps - while having the side panel on 

I tried but no difference.

16 minutes ago, Jurrunio said:

Cards like this blow warm air out from the top and bottom of the heatsink, i.e. towars the motherboard and case side panel. No amount of airflow can fix a side panel that is blocking air by sitting right on the air's path.

There's a small exhaust behing the GPU but most of the hot air seems to be exhausted from side. So I think a bigger case would be the only option.

Intel Core i5 9700K 5.0Ghz / Gigabyte Z390 M Gaming / 16GB DDR4 3600Mhz CL16 /  Sapphire Pulse RX 5700 8GB GDDR6   /  WD Blue SN550 1TB / Crucial MX500 500GB / Corsair RM550x / Fractal Design Define Mini C TG / Windows 10 / 

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6 minutes ago, Lare111 said:

I tried but no difference.

There's a small exhaust behing the GPU but most of the hot air seems to be exhausted from side. So I think a bigger case would be the only option.

Honestly I wouldnt. 75°C is still fine for the GPU. As long as you're under 80 you don't need to worry. Especially not worth the extra cost's you'll have

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1 minute ago, KKLawrence said:

Honestly I wouldnt. 75°C is still fine for the GPU. As long as you're under 80 you don't need to worry. Especially not worth the extra cost's you'll have

Yeah. I'm just planning to overclock. Also, I would like to keep my PC quiet.

Intel Core i5 9700K 5.0Ghz / Gigabyte Z390 M Gaming / 16GB DDR4 3600Mhz CL16 /  Sapphire Pulse RX 5700 8GB GDDR6   /  WD Blue SN550 1TB / Crucial MX500 500GB / Corsair RM550x / Fractal Design Define Mini C TG / Windows 10 / 

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Just now, Lare111 said:

Yeah. I'm just planning to overclock. Also, I would like to keep my PC quiet.

Oh, if that's the case, then I'd aim for another case. Maybe the 5000D or Meshify 2, as they both are big enough to ultimately host a watercooling setup and are great in air cooling performance. The Fractal Torrent also has very low GPU temps, so headroom for oc'ing there.

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5 minutes ago, KKLawrence said:

Oh, if that's the case, then I'd aim for another case. Maybe the 5000D or Meshify 2, as they both are big enough to ultimately host a watercooling setup and are great in air cooling performance. The Fractal Torrent also has very low GPU temps, so headroom for oc'ing there.

They are all sligthly too big for me. I was looking for Lian LI LANCOOL II Mesh Performance or Corsair 4000D Airflow since they are both on sale. But I don't know how big the difference in temps will be. 

Intel Core i5 9700K 5.0Ghz / Gigabyte Z390 M Gaming / 16GB DDR4 3600Mhz CL16 /  Sapphire Pulse RX 5700 8GB GDDR6   /  WD Blue SN550 1TB / Crucial MX500 500GB / Corsair RM550x / Fractal Design Define Mini C TG / Windows 10 / 

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27 minutes ago, Lare111 said:

They are all sligthly too big for me. I was looking for Lian LI LANCOOL II Mesh Performance or Corsair 4000D Airflow since they are both on sale. But I don't know how big the difference in temps will be. 

If they are too compact and your GPU has not enough room and is too close to the sidepanel, then the problem will appear again. So yes, the 300a is very compact, but the Meshify 2 compact, 4000D airflow and similar cases are also not that wide

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2 minutes ago, KKLawrence said:

If they are too compact and your GPU has not enough room and is too close to the sidepanel, then the problem will appear again. So yes, the 300a is very compact, but the Meshify 2 compact, 4000D airflow and similar cases are also not that wide

That's what I'm afraid of too. Phanteks P600S is definitely larger, 40mm wider and also has cool features. Maybe that one would be a great case for years. It's a bit expensive though. 

Intel Core i5 9700K 5.0Ghz / Gigabyte Z390 M Gaming / 16GB DDR4 3600Mhz CL16 /  Sapphire Pulse RX 5700 8GB GDDR6   /  WD Blue SN550 1TB / Crucial MX500 500GB / Corsair RM550x / Fractal Design Define Mini C TG / Windows 10 / 

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welcome to why i hate modern cases.

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45 minutes ago, Lare111 said:

That's what I'm afraid of too. Phanteks P600S is definitely larger, 40mm wider and also has cool features. Maybe that one would be a great case for years. It's a bit expensive though. 

What about the P500a - it's wider and has also good airflow?

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3 hours ago, KKLawrence said:

What about the P500a - it's wider and has also good airflow?

Yeah. But I like the closed top. I have added sound dampening material on top of my P300A already since I don't have any top exhaust fans.

Intel Core i5 9700K 5.0Ghz / Gigabyte Z390 M Gaming / 16GB DDR4 3600Mhz CL16 /  Sapphire Pulse RX 5700 8GB GDDR6   /  WD Blue SN550 1TB / Crucial MX500 500GB / Corsair RM550x / Fractal Design Define Mini C TG / Windows 10 / 

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