Why you can trust Tom's Hardware Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.
Protection Features, Evaluated
Check out our PSUs 101 article to learn more about PSU protection features.
Our protection features evaluation methodology is described in detail here.
|OCP||12V: - 5V: 33.35A (133.4%) 3.3V: 36.72A (166.9%) 5VSB: 4.7A (188%), 55.18mV ripple|
|OTP||Yes (>46°C ambient w/ full load)|
|SCP||12V: Yes 5V: Yes 3.3V: Yes 5VSB: Yes -12V: Yes|
|SIP||Surge: MOV Inrush: NTC thermistor & bypass relay|
OCP on the minor rails is configured at the usual high levels. We measured over 50mV of ripple with 4.7A load on the 5VSB rail, so the OCP should definitely be set lower.
The OPP is set reasonably at 116.6%, while over-temperature protection kicks in at >46°C ambient as the PSU delivers full load. It didn't shut down immediately, though. Rather, the ST1200-PT turned off once we removed the load.
There is SCP on all rails, along with surge and inrush current protection. Lastly, the power-good signal isn't accurate since it lasts longer than the PSU's hold-up time.
Current page: Protection Features, EvaluatedPrev Page Efficiency, Temperature, And Noise Next Page Cross-Load Tests And Infrared Images
Stay on the Cutting Edge
Join the experts who read Tom's Hardware for the inside track on enthusiast PC tech news — and have for over 25 years. We'll send breaking news and in-depth reviews of CPUs, GPUs, AI, maker hardware and more straight to your inbox.
Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.
Wow!! Extremely impressed with Aris's more thorough "Advanced Transient Tests" !!Reply
Great to see a reviewer who never stops evolving his work!!
Amazing work Aris !!!
Nice review, Aris. $233 is a lot to spend on a PSU. You can get a Corsair HX1200i for $210 after mail in rebate, which is a well-regarded PSU with a 7-year warranty.Reply
"...and as you can see, the glossy silver surface makes taking pictures difficult."Reply
It sure does, because the pictures have the exterior looking like matte black.