Seasonic Prime PX-1600 ATX v3.0 PSU Review

Protection Features

OCP (Cold @ 28°C)

12V: 181.6A (136.2%), 12.015V
5V: 34.4A (137.6%), 5.026V
3.3V: 37.9A (151.6%), 3.29V
5VSB: 3.6A (120%), 5.249V

OCP (Hot @ 41°C)

12V: 181.4A (136.05%), 12.013V
5V: 34.2A (136.8%), 5.015V
3.3V: 38.1A (152.4%), 3.283V
5VSB: 3.6A (120%), 5.25V

OPP (Cold @ 29°C)

2200.11W (137.51%)

OPP (Hot @ 40°C)

2169.16W (135.57%)

OTP

✓ (120°C @ 12V Heat Sink)

SCP

12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓

PWR_OK

Proper operation

NLO

SIP

Surge: MOV
Inrush: NTC Thermistor & Bypass relay

The over current protection (OCP) triggering points should be lower at high temperatures. The 12V rail has a higher set OCP than the TX-1600, which I don’t approve of; the same applies to over power protection (OPP). Moreover, the 3.3V rail’s OCP is set sky-high.

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5 thoughts on “Seasonic Prime PX-1600 ATX v3.0 PSU Review

  1. Based on your suggestions bought the PX-1600. Amazing quality and cables are braided. Saved around 130 USD compared to the TX version.
    I am using on a 220v socket so efficiency must be even better.

  2. Ok, thanks for replying crmaris. I’ve had good experience with Seasonic so far & their Prime range so I’ll stick with them, thanks again for your time & in-depth reviews.

  3. Hi crmaris, thanks for your reviews on the TX & this PX, awesome job.

    Are these cons significant enough to deter someone like yourself from buying one?
    Have you tested/reviewed a better high end alternative or more simply, which PSU in the 1300W+ category would be your go to right now?

    1. Hi! So far there isn’t any better choice in the ATX v3.0 and >1500W capacity. I haven’t tested something better. The Corsair AX1600i has higher overall performance but it isn’t ATX v3.0 compatible

  4. Very extensive review. I have the old Prime PX-1300 that has the 12v sense defect. I disconnected the wire and the PSU hasn’t turned off abnormally since when overclocking my 7900 XTX. My next PSU will definitely be ATX 3.0-compatible but I don’t think I need a new one, especially considering the limited choices now. I hope Corsair will update the AX1600i soon but I bet it will cost an arm and a leg.

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