Seasonic Prime TX-1300 ATX v3.0 PSU Review

Box & Bundle

The box is enormous since it contains one of the largest PSUs in today’s market. The rich bundle includes cable combs, an ATX jump-start plug, a case badge, zip ties, Velcro straps, and fixing bolts.

Product Photos

The silver parts of the fan grille, extending to the sides, provide a luxury note. The vents on the sides remind me of a sports car, assisting in the nice looks. Although this is a colossal PSU, its design makes it look appealing, but you should be careful to check if the chassis you will use will support it.

Cables

Modular Cables
Description Cable Count Connector Count (Total) Gauge In Cable Capacitors
ATX connector 20+4 pin (610mm) 1 1 16-18AWG No
4+4 pin EPS12V (700mm) 3 3 16AWG No
6+2 pin PCIe (750mm) 6 6 16AWG No
12+4 pin PCIe (750mm) (600W) 1 1 16-28AWG No
SATA (510mm+155mm+155mm+155mm) 4 16 18AWG No
SATA (410mm+150mm) 1 2 18AWG No
4-pin Molex (460mm+125mm+125mm) 1 3 18AWG No
AC Power Cord (1390mm) – C19 coupler 1 1 14AWG

There are many cables and connectors, including two EPS and six PCIe connectors. There is also a high-power PCIe cable set at 600W. The amount of SATA connectors is vast, but this is not true for the 4-pin Molex connectors. An additional one would be ideal.

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10 thoughts on “Seasonic Prime TX-1300 ATX v3.0 PSU Review

  1. Hello, back here where it all began!

    Following this wonderful guide, I purchased the aforementioned beast. I’ve had it for 6 months now and I can confirm the splendid features in terms of efficiency but above all it is totally silent.

    However, with the release of the ATX 3.1 standards, I ask at this point if it is compatible with the new 3.1 and if the cable will be suitable for a hypothetical 5000 series GPU.

    Thank you

    1. Hi! The cable remains the same, so it will be compatible with 5000 series, given that Nvidia won’t change the connector on its own again (which I doubt)

      1. Okay, thanks for the reply! So there are no good reasons to change it with a PSU with ATX 3.1 and PCIe 5.1 standards like the 1600 Noctua edition?

  2. Aris, have you noticed any weird noise when the PSU fan starts or stops? Or erratic fan behavior in this unit?

    My Seasonic Prime PX-750 had the fan start up and stop constantly while I was gaming. The fan itself was quiet but I could hear a weird rattling noise for one second as the fan started or stopped. This also sometimes happened at idle.

      1. 100% sure. It would happen when I switched Hybrid mode on and off. There was nothing rattling around in the PSU, nothing was stuck in it.

        1. Alright, update. No such noises coming from this PSU’s fan, just as advertised on this review, it is extremely silent. I was shocked at how silent it was. Normal behavior both in hybrid and always on mode. I keep my fan always running.

  3. I see all your expensive testing equipment push to the limits but please no 30 pages ahah.

    This PSU is gorgeous, look amazing for the people with a pc case showing it on the side/bottom. Some luxury sport car with the chrome look.
    Breaded cables very nice. It’s a personnal pref but downside they are 60-75cm ! I built a few mid-tower pc and i never needed more than 50cm for the ATX and GPU. Big hassle to hide all this extra ;(
    510€~ on Amazon for this monster, if i was not beyond the return window for my own PSU i would be tempted.

    I snatched a MSI MEG AI1300P for 279€ with the MSI Cashback/Review. Decent for platinum 1300w. I like the fact that the fan control is possible with msi center and usb mobo. Plus it’s start running auto by default only when it’s 65°C i believe.

    1. I highly recommend setting the PSU to the minimum fan RPM of 700. You don’t need the MSI software to keep running after you set it.

      I have this PSU and in my opinion, the fan starts way too late. I don’t like the amount of heat the PSU puts out, so I left mine running like specified above, and the PSU never heats up past 48C even during intense gaming (4090 and 14900K).

      I will replace it with this Seasonic Prime TX-1300 unit in a bit, though. Only reason I got this MSI was because Seasonic had no ATX 3.0 units at the time. I always feel more comfortable with Seasonic in my rig – not to say the MSI is bad, far from it. It’s a very high quality unit. I’m just a Seasonic kinda gal.

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