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be quiet! Pure Power 12 550W vs Cooler Master GX III 750: Comparison
What is the difference between be quiet! Pure Power 12 550W and Cooler Master GX III 750?
The gap that matters here is wattage: be quiet! Pure Power 12 550W 550 W against Cooler Master GX III 750 750 W, which puts Cooler Master GX III 750 27% ahead. Cooler Master GX III 750 also leads on pcie 8-pin connectors, 2 on the be quiet! Pure Power 12 550W versus 3 on the Cooler Master GX III 750.
Who each one is for
Buy the be quiet! Pure Power 12 550W for Quiet mainstream gaming builds and RTX 4060/RX 7600-class GPUs, though it is the wrong buy for anyone wanting fully modular cables and high-end or multi-GPU builds. The Cooler Master GX III 750 is the one to take for RTX 4070/4070 Ti builds wanting native ATX 3.1 and mainstream gaming rigs with a long-term warranty focus, though it is not built for high-wattage multi-GPU or workstation loads and SFX/small-form-factor builds. Our rating of the be quiet! Pure Power 12 550W (7.8/10): A quiet, Gold-rated 550W unit that's the right call for mainstream builds that don't need full modularity.
Which is cheaper, be quiet! Pure Power 12 550W or Cooler Master GX III 750?
At the last price check the be quiet! Pure Power 12 550W was $74.99 and the Cooler Master GX III 750 $99.99, a 33% premium.
Where the two are identical
The common ground is wider than the gap: warranty, 80 plus rating, atx standard, form factor and single +12v rail are identical here. They match on 4 further specifications as well.
Frequently asked questions
Do the be quiet! Pure Power 12 550W and Cooler Master GX III 750 differ on fan size?
Yes. Fan Size reads 120 mm on the be quiet! Pure Power 12 550W versus 135 mm on the Cooler Master GX III 750.
Is the 12V-2x6 Connectors the same on the be quiet! Pure Power 12 550W and Cooler Master GX III 750?
It is. Both are listed at 1, so it is not a reason to pick one over the other.
Specs and benchmarks
Brand
- be quiet! Pure Power 12 550W
- be quiet!
- Cooler Master GX III 750
- Cooler Master
Wattage
- be quiet! Pure Power 12 550W
- 550 W-27%
- Cooler Master GX III 750
- 750 WBest
80 PLUS Rating
- be quiet! Pure Power 12 550W
- Gold
- Cooler Master GX III 750
- Gold
Model Number
- be quiet! Pure Power 12 550W
- Pure Power 12 550W
- Cooler Master GX III 750
- GX III 750
ATX Standard
- be quiet! Pure Power 12 550W
- ATX 3.1
- Cooler Master GX III 750
- ATX 3.1
Form Factor
- be quiet! Pure Power 12 550W
- ATX
- Cooler Master GX III 750
- ATX
+12V Rail Amperage
- be quiet! Pure Power 12 550W
- 45.8 A
- Cooler Master GX III 750
- 62.5 A
Single +12V Rail
- be quiet! Pure Power 12 550W
- Yes
- Cooler Master GX III 750
- Yes
12V-2x6 Connectors
- be quiet! Pure Power 12 550W
- 1
- Cooler Master GX III 750
- 1
Zero-RPM Mode
- be quiet! Pure Power 12 550W
- No
- Cooler Master GX III 750
- Yes
Sleeved Cables
- be quiet! Pure Power 12 550W
- Yes
- Cooler Master GX III 750
- No
PCIe 8-pin Connectors
- be quiet! Pure Power 12 550W
- 2-33%
- Cooler Master GX III 750
- 3
Connector Count
- be quiet! Pure Power 12 550W
- 1x 24-pin ATX, 1x EPS 4+4, 1x 12V-2x6, 2x PCIe 6+2-pin, 5x SATA, 1x Molex (all fixed)
- Cooler Master GX III 750
- 1x 24-pin ATX, 1x EPS 4+4, 1x EPS 8-pin, 1x 12V-2x6, 3x PCIe 6+2-pin, 8x SATA, 4x Molex
Fan Size
- be quiet! Pure Power 12 550W
- 120 mm
- Cooler Master GX III 750
- 135 mm
Fan Model / Bearing
- be quiet! Pure Power 12 550W
- 120mm be quiet! fan, rifle bearing
- Cooler Master GX III 750
- 135mm (Hong Hua HA13525H12F-Z)
EPS 8-pin Connectors
- be quiet! Pure Power 12 550W
- 1
- Cooler Master GX III 750
- 2
SATA Connectors
- be quiet! Pure Power 12 550W
- 5
- Cooler Master GX III 750
- 8
Molex Connectors
- be quiet! Pure Power 12 550W
- 1
- Cooler Master GX III 750
- 4
Cable Lengths
- be quiet! Pure Power 12 550W
- 24-pin 600mm, max cable length 550mm
- Cooler Master GX III 750
- 24-pin 610mm, EPS 600mm, PCIe 550mm, 12V-2x6 650mm, SATA 500+120+120+120mm, Molex 500+120+120+120mm
Length
- be quiet! Pure Power 12 550W
- 160 mm
- Cooler Master GX III 750
- 160 mm
Colour
- be quiet! Pure Power 12 550W
- Black
- Cooler Master GX III 750
- Black
MTBF
- be quiet! Pure Power 12 550W
- 100000 hours
- Cooler Master GX III 750
- 100000 hours
Modularity
- be quiet! Pure Power 12 550W
- Non-Modular
- Cooler Master GX III 750
- Fully Modular
Protections
- be quiet! Pure Power 12 550W
- OTP, OCP, OPP, SCP, OVP, UVP, SIP
- Cooler Master GX III 750
- OPP, OVP, OTP, OCP, SCP, UVP, Surge & Inrush
Price
- be quiet! Pure Power 12 550W
- 74.99 USD
- Cooler Master GX III 750
- 99.99 USD
Warranty
- be quiet! Pure Power 12 550W
- 10 years
- Cooler Master GX III 750
- 10 years
Which one should you pick?
Choose be quiet! Pure Power 12 550W if you want the higher 12V-2x6 connectors (1 vs 1), the higher MTBF (100000 hours vs 100000 hours) and the higher warranty (10 years vs 10 years).
Choose Cooler Master GX III 750 if you want the higher wattage (750 W vs 550 W) and the higher PCIe 8-pin connectors (3 vs 2).
Price comparison
| Retailer | be quiet! Pure Power 12 550W | Cooler Master GX III 750 |
|---|---|---|
| Amazon | $74.99 View on Amazon | $99.99 View on Amazon |
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Verdict
be quiet! Pure Power 12 550W
7.8 / 10 Expert Rating
A quiet, Gold-rated 550W unit that's the right call for mainstream builds that don't need full modularity.
Cooler Master GX III 750
8.2 / 10 Expert Rating
A well-rounded 750W Gold ATX 3.1 unit with a strong warranty, right in step with the best in this wattage class.