Segotep GM850 Power Supply 850W, PCIe 5.1 & ATX 3.1 Full Modular 80 Plus Gold Certified Gaming PSU for NVIDIA RTX 20/30/40/50 Series and AMD Graphics Cards
Want the best price and purchase timing?
Our AI advisor analyzes real-time pricing across all channels to find you the best deal.
AI Verdict
The Segotep GM850 is an entry-level ATX 3.1 power supply that delivers native 12VHPWR support for RTX 40-series cards, but cuts corners on fan quality and warranty length.
This PSU gets your RTX 40-series GPU running with native ATX 3.1 support and no messy adapters. The short cables restrict it to mid-tower or micro-ATX cases, and the 5-year warranty reflects its entry-level tier.
If you want peace of mind and a silent fan, step up to a Corsair RM850e or MSI MAG A850GL for a 10-year warranty and better bearing quality.
Regret Score™
Low RiskLower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity
Issues discovered after purchase
Critically weak dimension
Amazon rating vs actual quality
Chance this product isn't for you
Pros
- Includes a native 12VHPWR cable capable of delivering 600W to PCIe 5.1 graphics cards.
- Handles up to 200% total power excursions to prevent system crashes during GPU spikes.
- Flat modular cables bend easily around tight corners behind the motherboard tray.
- DC-DC structure with Full Bridge LLC resonance provides stable 12V synchronous rectification.
- Measures a compact 140mm long, leaving plenty of room for cable slack in standard ATX cases.
Cons
- 120mm hydraulic bearing fan often develops a loud ticking noise after 12 to 24 months of use.
- CPU power cables are too short to comfortably route through full-tower cases.
- PCIe cables are daisy-chained, leaving ugly extra connectors hanging off your GPU.
- Backed by only a 5-year warranty, half the industry standard for 850W Gold units.
Dimension Scores
80 Plus Gold certification and handles 200% power excursions, but voltage regulation isn't class-leading.
Produces an audible idle hum and suffers from widespread reports of fan bearings ticking after 1-2 years.
Internal DC-DC structure is solid, but the 120mm fan and 5-year warranty drag the score down.
Flat cables bend easily, but daisy-chained PCIe connectors and short CPU cables frustrate the building process.
Best For
- RTX 4070 Ti or 4080 builds inside mid-tower cases.
- Builders who specifically need white flat cables to match a snow-themed aesthetic.
- Upgrading an older rig to ATX 3.1 standards.
Not Recommended For
- Full-tower cases where the short CPU EPS cables won't reach the top left motherboard socket.
- Ultra-quiet setups due to the audible low hum at idle and potential fan bearing degradation.
Watch Out For
- The 12VHPWR connector requires extreme force to seat fully—if it's not flush, you risk melting the cable.
- The PCIe cables have pigtails (daisy chains), meaning you'll have extra connectors dangling visibly if your GPU only needs single 8-pin inputs.
- The 120mm fan frequently develops a mechanical ticking sound after a year, requiring an RMA process with a brand that has limited US support.
Full Specifications
| ASIN | B08F1NFSG4 |
| Brand | Segotep |
| Wattage | 850 watts |
| Model Name | GF850 |
| Form Factor | ATX 3.0 |
| Item Weight | 5.29 pounds |
| Manufacturer | Segotep |
| Connector Type | ATX 3.1, PCI Express 5.1 |
| Cooling Method | Air |
| Output Wattage | 850 Watts |
| Item model number | 850W |
| Compatible Devices | Gaming Console |
| Product Dimensions | 5.91 x 5.51 x 3.35 inches |
| Item dimensions L x W x H | 5.91 x 5.51 x 3.35 inches |
What Buyers Say
The native 12VHPWR cable is the main reason people buy this unit, as it completely eliminates the need for bulky GPU adapters. The honeymoon phase ends after a year for many buyers when the 120mm fan bearing starts clicking or ticking. Builders consistently complain about the short CPU power cables, which basically require extensions if you're building in anything larger than a standard mid-tower. While it handles heavy loads from RTX 3080s and 4080s without crashing, the daisy-chained PCIe cables make achieving a clean look difficult.
“Worked great for exactly 2 years powering my 3080, but then the fan bearing started making a constant ticking noise that grows louder everyday.”
Common Praise
- Native 12VHPWR cable handles RTX 4080s perfectly without melting or crashing.
- Flat ribbon cables are highly flexible and easy to stuff behind the motherboard tray.
- Compact 140mm length leaves plenty of room in the basement for hard drive cages.
- Survives heavy power spikes from power-hungry cards like the RX 6950 XT.
Common Complaints
- Fan bearing develops a loud, constant ticking noise after 12 to 24 months.
- CPU EPS cables are too short to route cleanly in full-tower cases.
- PCIe cables feature ugly daisy-chains instead of clean, single connectors.
- 12VHPWR cable is extremely stiff at the connector and hard to plug in all the way.
Ownership Tips
- The fan curve is aggressive, meaning you'll hear a low hum even when just browsing the web.
- You'll likely need to buy a CPU cable extension if your case is taller than 18 inches.
- The 12VHPWR connector requires a terrifying amount of force to click into the PSU side.
Frequently Asked Questions
Does this come with the 16-pin cable for RTX 40-series cards?
Yes, it includes a native 12VHPWR cable rated for up to 600W. You won't need to use the bulky Nvidia adapter.
Are the cables braided or flat?
The cables are flat, ribbon-style wires. They are not individually sleeved, which makes them easier to bend but less premium looking.
Will the CPU cables reach in a full-tower case?
Multiple owners report the CPU EPS cables are unusually short. They struggle to reach the top of large cases without extensions.
Is the fan loud under load?
It produces a low hum at idle. The bigger issue is long-term reliability, as many buyers report the fan bearing starts ticking or clicking after a year of use.
Is Segotep a reliable brand?
They are a massive OEM in Asia but sit around Tier B on Western PSU tier lists. The included 5-year warranty is shorter than the 10-year standard from top-tier brands.
Buying Guide
When buying an entry-level power supply, you are usually trading acoustic performance and warranty length for raw wattage. This unit gives you the modern ATX 3.1 connections you need for current graphics cards, but you are stuck with a 5-year warranty instead of the 10-year standard found on premium units. Pay close attention to your case size, as the included cables are shorter than average and might not reach your motherboard's top sockets.
ATX 3.1 / PCIe 5.1
This means the power supply can handle massive, split-second spikes in power demand from modern graphics cards without shutting down your PC.
12VHPWR Cable
A single, high-capacity cable that plugs directly into Nvidia RTX 40-series cards, replacing the messy 3-to-1 adapter dongles.
80 Plus Gold
An efficiency rating showing that the power supply wastes less electricity as heat compared to Bronze or White units, drawing less power from the wall.
Alternatives
Look for an 850W ATX 3.0 power supply with a 10-year warranty, a 135mm fluid dynamic bearing fan, and single-connector PCIe cables.
You Might Also Like
Micro ATX PC Case | Mini Tower Computer case | Pre-Installed 120mm*1 RGB Fan | ITX Desktop Chassis for MATX/ITX | 240 RAD | 280mm GPU | 160mm CPU Cooler Height - White S6
$0-$49This MAQUY S6 is a budget Micro ATX case with a pre-installed 120mm RGB fan, supporting 280mm GPUs and 240mm top radiators for entry-level builds.
Micro ATX Case, Mini PC ITX Desktop Computer Case MATX Case Support ATX PSU/250mm GPU/135mm CPU Cooler/1x 3.5’’HDD or 2X 2.5’’SSD/USB 3.0 Port
$0-$49This is a compact 38.5x19.5x32.5cm Micro ATX case supporting 250mm GPUs and 135mm CPU coolers, designed for budget workstation builds.
Small PC Case, ITX Mini Computer Case with 360 Degree Ventilation, 10.5L Compact Design for ITX Motherboard, SFX Power Supply, 4 x 2.5 Inch SSDs
$50-$99This 10.5L acrylic ITX case supports SFX/SFX-L PSUs, ITX motherboards, and GPUs up to 210mm, designed for compact builds.
Micro ATX PC Case | Mini Tower Computer case Support Vertical GPU Mount | Pre-Installed 120mm*1 RGB Fan | ITX Desktop Chassis for MATX/ITX | 240 RAD | 320mm GPU | 165mm CPU Cooler Height-Black
$0-$49A budget Micro ATX case with a mesh front, tempered glass, and support for 320mm GPUs and 240mm AIOs, but only one pre-installed 120mm RGB fan.