Thermaltake Berlin (OEM Sirtec) voltage 3.3v,5v rails problem?

Sep 3, 2018
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Hi guys,
I'm little worried about my PSU voltage rail, I'd like to know your opinion.

My specs are:
-H370 Aorus Gaming 3 wifi (BIOS F3)
-Intel core i5 8600k
-Cooler Arctic Freezer 33 plus
-2x8 GB Crucial Ballistix Sport PC4-19200
-GPU GTX 1050 Ti Zotac ZT-P10510A-10L
-SSD Crucial MX500 250 GB
-HD Western Digital Blue 2TB
-HD Western Digital Red 3TB
-PSU Thermaltake Berlin 630W (OEM Sirtec, 80 plus not bronze!!)
-Case Cooler Master N300
-3 case fans (1 cooler master and 2 noctua)

PSU is the only component I inherited from my previous rig (it's about 5-6 years old if I recall).
I premise my system works fine during working,gaming, etc. (just a little problem about booting time but i hope to solve reinstalling OS).
Anyway i'm paraoid :) so.. since few days, i'm monitoring PSU voltage and i can see in gigabyte hardwaremonitor:
-3.3V: basically fixed at 3.403V
-5V: basically fixed at 5.13V
-12V range: 12.38V÷12.45V (mostly stuck at 12.38)

Here's a pic about BIOS monitoring, showing about the same:
BIOS voltages

Are these temps fine by your opinion? I'm particularly worried about 3.3V rail very close to max suited voltage (3.465V i think). Also 5V doesn't sound so good.
I fear bad voltages could damage my hardware over time.
But I'm not an expert in the field so I wait for your more suitable voices.

Thank you very much!
 

Those values are fine. Most modern computers only utilize thw +12V rails anyway.
That being said, The TT PSU is not known as one of the better units. As it is 5-6 years old, and out of warranty, I would recommend getting a higher quality, 450-550 watt unit, say Seasonic Focus series, or Corsair CX (grey label, not green).