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be quiet! Power Zone 2 850W vs Gigabyte UD850GM PG5: Comparison
be quiet! Power Zone 2 850W vs Gigabyte UD850GM PG5 warranty compared
The gap that matters here is warranty: be quiet! Power Zone 2 850W 10 years against Gigabyte UD850GM PG5 5 years, which puts be quiet! Power Zone 2 850W 50% ahead. Add pcie 8-pin connectors to that, 3 on the be quiet! Power Zone 2 850W versus 4 on the Gigabyte UD850GM PG5, and the pattern holds. Hold-up time runs the same way, 21.1 ms on the be quiet! Power Zone 2 850W versus 16 ms on the Gigabyte UD850GM PG5, another win for be quiet! Power Zone 2 850W.
Who each one is for
Take the be quiet! Power Zone 2 850W for buyers who specifically prioritize measured, independently-verified quiet operation. The Cybenetics A+ rating here is uniquely strong at this wattage tier. It also earns its place with home theater PCs or quiet-room builds where any fan noise is noticeable. This unit is specifically engineered to minimize that concern. It is not the one for the tightest possible 850W budget. The Montech Century II, covered elsewhere on this site, delivers solid Gold-rated performance at a meaningfully lower price for buyers who don't need the acoustic advantage. The Gigabyte UD850GM PG5 suits Gigabyte AORUS-themed builds and RTX 4070 Ti/4080-class GPUs wanting native ATX 3.1, though it is not the pick for buyers wanting the most field-proven, established brand and Multi-GPU workstation loads.
Which is cheaper, be quiet! Power Zone 2 850W or Gigabyte UD850GM PG5?
At the last price check the Gigabyte UD850GM PG5 was $110 and the be quiet! Power Zone 2 850W $125, a 14% premium.
Frequently asked questions
Do the be quiet! Power Zone 2 850W and Gigabyte UD850GM PG5 differ on fan size?
Yes. Fan Size reads 140 mm on the be quiet! Power Zone 2 850W versus 120 mm on the Gigabyte UD850GM PG5.
Is the Modularity the same on the be quiet! Power Zone 2 850W and Gigabyte UD850GM PG5?
It is. Both are listed at Fully Modular, so it is not a reason to pick one over the other.
Specs and benchmarks
Brand
- be quiet! Power Zone 2 850W
- be quiet!
- Gigabyte UD850GM PG5
- Gigabyte
Wattage
- be quiet! Power Zone 2 850W
- 850 W
- Gigabyte UD850GM PG5
- 850 W
80 PLUS Rating
- be quiet! Power Zone 2 850W
- Platinum
- Gigabyte UD850GM PG5
- Gold
Model Number
- be quiet! Power Zone 2 850W
- Power Zone 2 850W
- Gigabyte UD850GM PG5
- UD850GM PG5
ATX Standard
- be quiet! Power Zone 2 850W
- ATX 3.1
- Gigabyte UD850GM PG5
- ATX 3.0
Form Factor
- be quiet! Power Zone 2 850W
- ATX
- Gigabyte UD850GM PG5
- ATX
Single +12V Rail
- be quiet! Power Zone 2 850W
- Yes
- Gigabyte UD850GM PG5
- Yes
Cybenetics Efficiency
- be quiet! Power Zone 2 850W
- Platinum
- Gigabyte UD850GM PG5
- Gold
Cybenetics Noise
- be quiet! Power Zone 2 850W
- A+
- Gigabyte UD850GM PG5
- A-
PCIe CEM Standard
- be quiet! Power Zone 2 850W
- PCIe 5.1
- Gigabyte UD850GM PG5
- PCIe 5.0
12V-2x6 Connectors
- be quiet! Power Zone 2 850W
- 1
- Gigabyte UD850GM PG5
- 1
Hold-Up Time
- be quiet! Power Zone 2 850W
- 21.1 ms
- Gigabyte UD850GM PG5
- 16 ms-24%
Sleeved Cables
- be quiet! Power Zone 2 850W
- Yes
- Gigabyte UD850GM PG5
- No
PCIe 8-pin Connectors
- be quiet! Power Zone 2 850W
- 3-25%
- Gigabyte UD850GM PG5
- 4
Connector Count
- be quiet! Power Zone 2 850W
- 1x 24-pin ATX, 1x EPS 4+4, 1x EPS 8-pin, 1x P4, 1x 12V-2x6 (600W), 3x PCIe 6+2-pin, 7x SATA, 1x Molex
- Gigabyte UD850GM PG5
- 1x 24-pin ATX, 2x EPS 4+4, 1x 16-pin 12VHPWR (600W native), 4x PCIe 6+2-pin, 8x SATA, 3x Molex, 1x floppy
Fan Size
- be quiet! Power Zone 2 850W
- 140 mm
- Gigabyte UD850GM PG5
- 120 mm
Fan Model / Bearing
- be quiet! Power Zone 2 850W
- Pure Wings 3 140mm (BQ PUW3-14025-HR), rifle bearing
- Gigabyte UD850GM PG5
- 120mm hydraulic bearing
OEM / Platform
- be quiet! Power Zone 2 850W
- FSP
- Gigabyte UD850GM PG5
- CWT
EPS 8-pin Connectors
- be quiet! Power Zone 2 850W
- 2
- Gigabyte UD850GM PG5
- 2
SATA Connectors
- be quiet! Power Zone 2 850W
- 7
- Gigabyte UD850GM PG5
- 8
Molex Connectors
- be quiet! Power Zone 2 850W
- 1
- Gigabyte UD850GM PG5
- 3
Cable Lengths
- be quiet! Power Zone 2 850W
- ATX 590mm, EPS 700mm, PCIe 600mm, 12V-2x6 600mm, SATA 550+150+150+155mm and 500+150+150mm
- Gigabyte UD850GM PG5
- 24-pin 610mm, EPS 600+200mm, 16-pin 700mm, PCIe 600+150mm
Length
- be quiet! Power Zone 2 850W
- 160 mm
- Gigabyte UD850GM PG5
- 140 mm
Colour
- be quiet! Power Zone 2 850W
- Black
- Gigabyte UD850GM PG5
- Black
Fan Bearing
- be quiet! Power Zone 2 850W
- Rifle
- Gigabyte UD850GM PG5
- Hydro
MTBF
- be quiet! Power Zone 2 850W
- 100000 hours
- Gigabyte UD850GM PG5
- 100000 hours
Modularity
- be quiet! Power Zone 2 850W
- Fully Modular
- Gigabyte UD850GM PG5
- Fully Modular
Protections
- be quiet! Power Zone 2 850W
- OTP, OCP, OPP, SCP, OVP, UVP, SIP
- Gigabyte UD850GM PG5
- OVP, OPP, SCP, UVP, OCP, OTP
Price
- be quiet! Power Zone 2 850W
- 124.99 USD
- Gigabyte UD850GM PG5
- 109.99 USD
Warranty
- be quiet! Power Zone 2 850W
- 10 yearsBest
- Gigabyte UD850GM PG5
- 5 years-50%
Which one should you pick?
Choose be quiet! Power Zone 2 850W if you want the higher wattage (850 W vs 850 W), the higher 12V-2x6 connectors (1 vs 1) and the higher Hold-Up time (21.1 ms vs 16 ms).
Choose Gigabyte UD850GM PG5 if you want the higher PCIe 8-pin connectors (4 vs 3).
Price comparison
| Retailer | be quiet! Power Zone 2 850W | Gigabyte UD850GM PG5 |
|---|---|---|
| Amazon | $124.99 View on Amazon | $109.99 View on Amazon |
| Newegg | View on Newegg |
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
Gigabyte UD850GM PG5
8 / 10 Expert Rating
A modern, well-specced ATX 3.1 Gold unit for Gigabyte-themed builds, docked slightly for being a newer, less field-tested platform.
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