Seasonic Prime TX-1300 ATX v3.0 PSU Review

The Seasonic Prime TX-1300 is one of the best performing PSUs in today’s market, in overall performance, noise output and efficiency. The lower capacity than its big brother, the TX-1600, helps it achieve top performance. Read the full review to find out what you get with 440 dollars, its current price! 

The Seasonic Prime TX-1300 is included in my best ATX v3.0 & PCIe 5.0 PSU picks article.

If you check our best ATX v3.x PSU article, you will notice that the Seasonic Prime TX-1300 achieves first place in the >1250W PSUs in almost all sections. This triggered my interest in providing a detailed review of this model.

I have already reviewed the following units from Seasonic in 2023:

Besides Titanium efficiency, in the Cybenetics scheme, the TX-1300 also has a Cybenetics-A++ noise rating, which is the best, meaning below 15 dBA average noise output. The maximum operating temperature is 50°C, but during the mining craziness and to avoid any problems, Seasonic started derating its PSUs at that temperature, stating that they can deliver only 80% of their max power continuously. If you want full power around the clock, you must remain at 40°C. Since the Prime series is backed up by the longest warranty possible in a power supply, 12 years, Seasonic had to ensure there would be no problems in the long run. With a price of 440 dollars, the TX-1300 is far from affordable, but the super long warranty and the top-notch build quality, as you will notice in the part analysis section, are two things that don’t come cheap.



Technical Specifications:
  • Manufacturer (OEM): Seasonic
  • Max Power: 1300W
  • Cybenetics Efficiency: [115V] Cybenetics Titanium (91-93%)
  • 80 Plus Efficiency: Titanium
  • Noise [115V]: Cybenetics A++ (<15 dB[A])
  • Compliance: ATX v3.0, EPS 2.92
  • Operating Temperature (Continuous Full Load): 0 – 50 °C (derating from 100 % to 80 % from 40 °C to 50 °C)
  • Alternative Low Power Mode support: Yes
  • Power 12V combined: 1300W
  • Number of 12V rails: 1
  • Power 5V + 3.3v: 125W
  • Power 5VSB: 15W
  • Cooling: 135mm Fluid Dynamic Bearing Fan (HA13525H12SF-Z)
  • Semi-Passive Operation: ✓ (selectable)
  • Modular Design: Yes (Fully)
  • High Power Connectors: 3x EPS (3x cables), 6x PCIe 6+2 pin (6x cables), 1x PCIe 12+4 pin (600W)
  • Peripheral Connectors: 18x SATA (5x cables), 3x 4-pin Molex (single cable)
  • ATX Cable Length: 610mm
  • EPS Cable Length: 700mm
  • 6+2 pin PCIe Cable Length: 750mm
  • 12+4 pin PCIe Cable Length: 750mm
  • Distance between SATA / 4-pin Molex: 150mm / 125mm
  • In-cable capacitors: No
  • Dimensions (W x H x D): 150 mm x 85 mm x 210mm
  • Weight: 3.04 kg (6.7 lb)
  • Warranty: twelve years
  • Street price (excluding VAT): $440

Power Specifications

Rail 3.3V 5V 12V 5VSB -12V
Max. Power Amps 25 25 108.33 3 0.5
Watts 125 1300 15 6
Total Max. Power (W) 1300
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One thought on “Seasonic Prime TX-1300 ATX v3.0 PSU Review

  1. 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.

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