CPU SFX PSU Fan Noise

[Mopar63]

Hey gang, I am running a system with the following specs:

• Rzyen 3600
• Gigabyte X570 ITX
• Inland Premium NVME
• 16 GB Crucial DDR4 3200
• Sapphire Pulse 5700XT
• Cooler Master NR200
• Cooler Master Master Liquid ML280
• 2x Noctua 120x15 and 2x Cooler Master Sickleflow 120 (both sets at 45% fan speed)
• FSP Dagger Pro 550

This setup has a power draw, according to my UPS of 360 or so watts under peak gaming loads. I see between 345 and 360 while playing RDR2. After about 10 Minutes of RDR2 I notice the noise from the PC has picked up. At first I thought it was the CPU or GPU coolers but checking, neither was making all that much noise, it was instead the PSU.

I am curious of a couple of things.

• Is my PSU underpowered to stay quiet, should I get a bigger PSU?
• Is the PSU fan based purely off of wattage pulled as the various vendor charts indicate or is heat an issue for fan speed?
• Is it just this PSU, would a different 550 in the same setup be quieter?

 

[smitty2k1]

Yes most, if not all, PSUs have their fan curves tied to power output.

You could try a fan mod or a different PSU. The Corsair gold and platinum PSUs are highly regarded as being the quietest SFX PSUs.

If your case can fit an SFX-L form factor PSU you have some more options, some of those have quieter 120mm fans.

 

[Mopar63]

The case will fit an SFX-L but the modular cables actually push down on the GPU backplate. I have tried to pull them up enough but just not happening.

I am considing a fan fan with a Noctua 92x14 and also looking at an SF750 or a Silverstone SX-700PT

 

[smitty2k1]

The case will fit an SFX-L but the modular cables actually push down on the GPU backplate. I have tried to pull them up enough but just not happening.

I am considing a fan fan with a Noctua 92x14 and also looking at an SF750 or a Silverstone SX-700PT

If you're willing to pay the price you can't go wrong with the SF750 platinum.