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Rectangular matte-black ATX power supply with honeycomb fan grille and modular cable sockets

Seasonic

Seasonic PRIME GX-750 750W 80+ Gold Full Modular Power Supply

SKU CH-79YX-25AE6 MPN PRIME GX-750

A 750 W fully modular ATX power supply with 80 PLUS Gold efficiency, a 135 mm fluid dynamic bearing fan and hybrid fan control, single +12 V rail rated at 62 A.

  • Max wattage750 W
  • Modular cablingFull Modular
  • Fan configuration135 mm Fluid Dynamic Bearing Fan
  • Main power connector20+4Pin
  • 12V railsSingle
  • PCIe power connectors4 × 6+2-Pin

Model ATX Gold (750W)

  • Tight voltage regulation under .5 percent for stable high-performance operation
  • Fully modular cabling reduces clutter and improves case airflow
  • 80 PLUS Gold certification cuts energy waste during power conversion
  • Hybrid fan control offers silent fanless mode at low loads
  • 150000 hour MTBF at 25 degrees Celsius indicates long-term reliability

750W ATX Power Supply for High-Performance Builds

This 750-watt ATX 12V unit delivers a single +12V rail rated at 62A with micro-tolerance load regulation under 0.5%. It targets enthusiasts and gamers who need stable, efficient power for multi-GPU configurations and demanding components. Full modular cabling and a 140mm chassis depth simplify installation in compatible cases.

Ideal for Multi-GPU Systems.

The four 6+2-pin PCIe connectors and eight SATA ports support multi-graphics-card setups and abundant storage. A 135mm fluid dynamic bearing fan with hybrid control offers a fanless mode for quiet operation. Builders using space-constrained chassis should verify the 140mm length fits their case before purchase.

Single +12V Rail at 62A Decides Compatibility

The entire 750W capacity is available on one +12V rail rated at 62A, simplifying power distribution for high-end graphics cards and CPUs. If your combined +12V draw approaches this limit, a higher-wattage unit is required. This single-rail figure is the key specification for matching the PSU to your hardware.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $114.99
Cheaper than about 61% of the 10,869 comparable items (median $142.99).
Max wattage 750 W
Lower than about 60% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameSeaSonic
Product linePRIME Ultra Gold
Model namePRIME GX-750 (SSR-750GD2)
Product typeIntel ATX 12 V
Ports & slots
PCIe power connectors4 × 6+2-Pin
SATA power connectors8
Output type+3.3 V@20A, +5 V@20A, +12 V@62A, +5VSB@3A
Connection types1 x Main Power (24/20 pins)
2 x CPU (8/4 pins)
4 x PCIe (8/6 pins)
8 x SATA
3 x Peripheral
1 x Floppy
Power
Max wattage750 W
Modular cablingFull Modular
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Supply voltage100–240 V
AC input frequency50/60 Hz
Rated input current10–5 A
Size & build
Product dimensions5.91 in × 5.51 in × 3.39 in
Product weight7.5 lb (3.4 kg)
Shipping weight3.18 kg
Package size343 × 206 × 137 mm
Compatibility
PSU length limit140 mm
Environment & compliance
Regulatory approvalscTUVus, TUV, CB, CCC, BSMI, EAC, Energy Star, RoHS, WEEE, ErP Lot 6, REACH
More details
Fan configuration135 mm Fluid Dynamic Bearing Fan
Mean time between failures150,000 h MTBF @ 25 degree C, excl. fan

Other versions of this model

5 more in the same range

Questions about this item

What does the 750 W maximum power mean for a real build?

It provides up to 750 W total output with a single +12 V rail rated at 62 A, enough for high-end CPUs and GPUs while leaving headroom for drives and peripherals.

How does the 80 PLUS Gold certification limit efficiency in practice?

The unit meets 80 PLUS Gold requirements, so it runs at high efficiency across typical loads, lowering heat and electricity use compared with lower-rated supplies.

What clearance does the 140 mm length need in a case?

The power supply is 140 mm long, so the case must support at least that depth in the PSU chamber for a proper fit.

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