Gigabyte UD850GM PG5
Expert rating8 / 10
- Wattage:
- 850 W
- 80 PLUS Rating:
- Gold
- Modularity:
- Fully Modular
- ATX Standard:
- ATX 3.0
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Manufacturer: Gigabyte Last updated: 2026-09-12
Where to buy
- AmazonGo to store
Gigabyte UD850GM PG5 Review
Building around a Gigabyte AORUS motherboard and looking for a matching PSU with native PCIe 5.0 support, the Gigabyte UD850GM PG5 brings ATX 3.1 compliance and a 12V-2x6 cable to Gigabyte's mainstream UD power supply line.
We'd recommend it for RTX 4070 Ti/4080-class builds that want the newest ATX 3.1 spike-handling spec without paying flagship prices. It's a newer, less proven platform than the established Corsair or Seasonic names, but the spec sheet checks every modern box.
ATX 3.1 and PG5
The 'PG5' naming signals PCIe Gen 5 native support: a single 12V-2x6 cable capable of delivering up to 600W to the GPU without an adapter, tested to the newer ATX 3.1 transient spec that tightens spike tolerances further than ATX 3.0.
Comparison to Alternatives
Against the MSI MPG A850G PCIE5 already in the catalog, the UD850GM PG5 matches the native 12V-2x6 connector and Gold efficiency at a similar price point, with Gigabyte's platform being the newer ATX 3.1-certified design. Against the Cooler Master GX III 750, the UD850GM PG5 offers 100W more headroom on the same ATX 3.1 spec.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8 / 10
A modern, well-specced ATX 3.1 Gold unit for Gigabyte-themed builds, docked slightly for being a newer, less field-tested platform.
Best for
- Gigabyte AORUS-themed builds
- RTX 4070 Ti/4080-class GPUs wanting native ATX 3.1
- Mainstream high-end gaming rigs
Not for
- Buyers wanting the most field-proven, established brand
- Multi-GPU workstation loads
- SFF builds needing SFX
Specifications
What these specs meanIdentity
| Brand | Gigabyte |
|---|---|
| Model Number | UD850GM PG5 |
Output and rails
| Single +12V Rail | Yes |
|---|
Standards and compliance
| PCIe CEM Standard | PCIe 5.0 |
|---|---|
| Hold-Up Time | 16 ms |
GPU power delivery
| Native GPU Cable Incl | Yes |
|---|
Connector inventory
| EPS 8-pin Connectors | 2 |
|---|---|
| SATA Connectors | 8 |
| Molex Connectors | 3 |
Form factor and fit
| Length | 140 mm |
|---|---|
| Colour | Black |
Cooling
| Fan Bearing | Hydro |
|---|
Build quality
| Topology | LLC resonant + DC-DC |
|---|---|
| MTBF | 100000 hours |
Cables
| Modularity | Fully Modular |
|---|---|
| Cable Type | Flat Ribbon |
Monitoring, protection and price
| Protections | OVP, OPP, SCP, UVP, OCP, OTP |
|---|---|
| Price | 109.99 USD |
| Warranty | 5 years |
| Wattage | 850 W |
|---|---|
| 80 PLUS Rating | Gold |
| ATX Standard | ATX 3.0 |
| Form Factor | ATX |
| Cybenetics Efficiency | Gold |
| Cybenetics Noise | A- |
| 12V-2x6 Connectors | 1 |
| Sleeved Cables | No |
| PCIe 8-pin Connectors | 4 |
| Connector Count | 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 | 120 mm |
| Fan Model / Bearing | 120mm hydraulic bearing |
| OEM / Platform | CWT |
| Japanese Capacitors | Yes |
| Cable Lengths | 24-pin 610mm, EPS 600+200mm, 16-pin 700mm, PCIe 600+150mm |
FAQs
What are the key specifications of the Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier)?
Key specs for the Gigabyte UD850GM PG5: Wattage 850 W, Modularity Fully Modular, Fan Size 120 mm, Warranty 5 years, 80 PLUS Rating Gold, Cybenetics Efficiency Gold.
Will the Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier) work with my current setup?
The Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier) lists Wattage is 850 W. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier) best suited to?
Best suited to: Gigabyte AORUS-themed builds; RTX 4070 Ti/4080-class GPUs wanting native ATX 3.1; Mainstream high-end gaming rigs.
What are the drawbacks of the Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier)?
Not the best fit for: Buyers wanting the most field-proven, established brand; Multi-GPU workstation loads; SFF builds needing SFX.
Compare and read more
- Antec HCG850 Gold Extreme (850W/80+ Gold/Fully Modular/ATX 3.0/High-End Tier) vs Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier)
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- ASUS TUF Gaming 750W Bronze (750W/80+ Bronze/Semi-Modular/ATX 2.x/Mainstream Gaming Tier) vs Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier)
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- be quiet! Pure Power 12 M 750W (750W/80+ Gold/ATX 3.0/Mainstream Gaming Tier) vs Gigabyte UD850GM PG5 (850W/80+ Gold/Fully Modular/ATX 3.1/Mainstream Gaming Tier)
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