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ITX PC Intake/Exhaust Design: Is Intake Needed?

Joined
Oct 21, 2005
Messages
7,111 (1.00/day)
Location
USA
System Name Computer of Theseus
Processor Intel i9-12900KS: 50x Pcore multi @ 1.18Vcore (target 1.275V -100mv offset)
Motherboard EVGA Z690 Classified
Cooling Noctua NH-D15S, 2xSF MegaCool SF-PF14, 4xNoctua NF-A12x25, 3xNF-A12x15, AquaComputer Splitty9Active
Memory G-Skill Trident Z5 (32GB) DDR5-6000 C36 F5-6000J3636F16GX2-TZ5RK
Video Card(s) ASUS PROART RTX 4070 Ti-Super OC 16GB, 2670MHz, 0.93V
Storage 1x Samsung 990 Pro 1TB NVMe (OS), 2x Samsung 970 Evo Plus 2TB (data), ASUS BW-16D1HT (BluRay)
Display(s) Dell S3220DGF 32" 2560x1440 165Hz Primary, Dell P2017H 19.5" 1600x900 Secondary, Ergotron LX arms.
Case Lian Li O11 Air Mini
Audio Device(s) Audiotechnica ATR2100X-USB, El Gato Wave XLR Mic Preamp, ATH M50X Headphones, Behringer 302USB Mixer
Power Supply Super Flower Leadex Platinum SE 1000W 80+ Platinum White, MODDIY 12VHPWR Cable
Mouse Zowie EC3-C
Keyboard Vortex Multix 87 Winter TKL (Gateron G Pro Yellow)
Software Win 10 LTSC 21H2
Just built this:
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Do I really need an intake fan? I tried running a 92mm intake on the right side but it just added noise. No cooling benefit at all.

GPU: Getting 70*C load Max 30*C Idle

CPU: Getting 65*C load Max 25*C Idle
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My power supply sucks in air and exhausts out the top, is this enough to cool my VRMs on the Z77E. My main concern is whether the motherboard can handle overclocks in the long term without an intake. The power supply is close enough to the side panel (sits directly above the itx) that it draws in air from that side and exhausts it out the top. The CPU has an AIO Cooler that dumps exhaust down to the bottom below the case. So the only real intake fan is the two on the GPU, and obviously that only benefits the GPU.

Runs a lot quieter and the temps seem the same side intake or not. I'm going to remove the Xeon and put the 2550k in soon enough. I just want to make sure I don't burn out my motherboard or something.
 
Well, experience would say you do need a intake to bring in cold air. But, if it doesn't add any cooling benefit to your hardware and you haven't had any overheating problems then its ultimately your choice.
 
Well, experience would say you do need a intake to bring in cold air. But, if it doesn't add any cooling benefit to your hardware and you haven't had any overheating problems then its ultimately your choice.

I am thinking that the two exhaust fans (power supply fan and radiator fan) serve as intake as well because of the large open hole and that running intake fans just disrupts the air flow. I just want to make sure I am not gonna kill my mobo. The mobo sensor temps are all pretty good, 35*C.
 
If it were me I would buy a new quiet fan just to be on the safe side. I personally like Noctua fans but there are other more affordable quite fans.

Or just pull it, stress everything on the system for at least a few hours and see where the temps are at for all the internals and the case itself. I use HeavyLoad & CPUID HWMonitor but again lots of options out there.
 
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