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Compare Lian Li SP750 vs RB550

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  2. Power Supplies
  3. Lian Li SP750 🆚 Lian Li RB550
Lian Li SP750 and Lian Li RB550 are both power supplies with the same EPS Connectors (2). The main differences are in Wattage, Modular, Efficiency and PCI-Express 6+2 Pin Connectors.
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Lian Li SP750 750W 80+ Gold Fully Modular
Lian Li SP750
Lian Li RB550 80 Plus Bronze Non Modular ATX 550W ATX 3.1 & PCIe 5.1 135mm Fan Active PFC Design (RB0550B)
Lian Li RB550
Prices
(Change region)
In Stock
Free shipping
$207.87
Prices
(Change region)
In Stock
$49.99
Last updated 14 minutes ago.
Out of Stock
$55.68
In Stock
Free shipping
$62.84
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Brand
Lian Li
Brand
Lian Li
Model
SP750
Model
  • RB0550B
  • G9P.RB0550B.B000.EU
  • G9P.RB0550B.B000
Release Date
-
Release Date
📅 October 2025
* First availability for purchase, it may not correspond to the actual market launch date.
User reviews
User reviews
Price history
View Details ►
Price history
View Details ►
Compatible PC parts
Graphics Cards ► Cases ►
Compatible PC parts
Graphics Cards ► Cases ►
Wattage
750 W
Wattage
550 W
Type
SFX
Type
ATX
Modular
Full
Modular
No
Efficiency
80+ Gold
Efficiency
80+ Bronze
PCI-Express 16 Pin 12VHPWR Connectors
0
PCI-Express 16 Pin 12VHPWR Connectors
0
PCI-Express 12 Pin Connectors
0
PCI-Express 12 Pin Connectors
0
PCI-Express 6+2 Pin Connectors
3
PCI-Express 6+2 Pin Connectors
2
PCI-Express 6 Pin Connectors
0
PCI-Express 6 Pin Connectors
0
EPS Connectors
2
EPS Connectors
2
SATA Connectors
8
SATA Connectors
3
Molex Connectors
4
Molex Connectors
1
Length
100 mm
Length
150 mm

Comparison and key differences summary

Reasons to buy the Lian Li SP750:

  • +200 Watts available
  • Fully modular power supply
  • Better 80 Plus efficiency
  • +1 PCI-Express 6+2 Pin connectors available
  • +5 SATA connectors available
  • +3 Molex connectors available

Buy now

Reasons to buy the Lian Li RB550:

  • 76% cheaper, you can save $157.88

Buy now

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