# Montech CENTURY II 850W Power Supply Unit, 80 PLUS Gold, ATX, 20+4 pin ATX

**URL:** https://aio.lv/en/product--montech-century-ii-850w--11456400
**Data updated:** 2026-06-05 12:17 (EEST)
**Category:** Power Supplies (PSU)
**Manufacturer:** Montech
**Manufacturer code:** CENTURY II 850W
**EAN:** 4710562747263
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 94.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 78.09 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--montech-century-ii-850w--11456400

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 13.07.2026 | free |
| Pickup points | 16.07.2026 | 1.89 EUR |
| Courier delivery to door | 16.07.2026 | 4.99 EUR |

## Summary description

The Montech CENTURY II is an 850W ATX power supply unit featuring 80 PLUS Gold efficiency certification. It includes a 20+4 pin ATX motherboard connector and an active cooling system with a 135mm fan for optimal thermal management. Designed for high-performance PC builds, this unit provides stable power delivery and reliable operation. Its modular design and robust build quality make it an ideal choice for modern desktop computer systems requiring consistent power.

## Long description

The Montech CENTURY II 850W is a high-performance ATX power supply unit designed to provide stable and efficient power for modern desktop computers. Featuring 80 PLUS Gold certification, this unit ensures optimal energy conversion, reducing waste and heat generation. It is built with high-quality components, including Japanese capacitors and an advanced circuit design, to ensure long-term reliability and consistent power delivery for demanding hardware configurations.
Advantages
This power supply unit stands out due to its modular design, which allows for cleaner cable management and improved airflow within the PC case. The inclusion of a 135mm Fluid Dynamic Bearing fan provides efficient cooling while maintaining low noise levels, even under heavy loads. With support for the latest ATX 3.1 and PCIe 5.1 standards, including a dedicated 12V-2x6 cable, it is fully compatible with modern high-end graphics cards. Furthermore, the unit incorporates comprehensive safety protections such as over-power, over-voltage, and short-circuit protection to safeguard your system components.
Suitable for
High-performance gaming PC builds
Workstations requiring stable power delivery
Systems utilizing modern high-power graphics cards
PC builds where cable management and aesthetics are a priority
This power supply may not be suitable for ultra-compact small form factor (SFF) cases that require SFX power supplies rather than standard ATX units. Additionally, for systems with extremely low power consumption, an 850W unit may be overkill, and a lower-wattage model might be more cost-effective.
Key specifications
Total power: 850 W
Efficiency certification: 80 PLUS Gold
Form factor: ATX
Cooling: 135 mm active fan
Motherboard connector: 20+4 pin ATX
Modular design: Fully modular
Safety protections: OPP, OVP, UVP, SCP, OCP, OTP
To use the Montech CENTURY II, install the unit into your PC case using the provided mounting screws. Connect the 20+4 pin ATX cable to your motherboard and the necessary CPU and PCIe cables to your components. Because the unit is fully modular, you only need to attach the cables required for your specific build, which helps keep the interior of your computer organized. Ensure all connections are firmly seated before powering on the system.
What to consider before purchase
Verify that your PC case supports the ATX form factor
Ensure your total system power draw aligns with the 850W capacity
Check that your graphics card requires the included 12V-2x6 or standard PCIe connectors
Confirm the physical dimensions fit your specific chassis layout
For optimal performance and longevity, ensure the power supply intake fan has sufficient clearance from the bottom or side of the case to allow for proper airflow. Regularly clean dust from the fan intake to maintain quiet operation and thermal efficiency.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 850 W |
| Power Factor Correction (PFC) type | Active |
| Power protection features | Overheating, Over current, Short circuit, Under voltage, Over voltage, Over power |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 849.6 W |
| Combined power (+5V) | 100 W |
| Combined power (-12V) | 3.6 W |
| Max output current (+3.3V) | 20 A |
| Max output current (+12V) | 70.8 A |
| Max output current (+5V) | 20 A |
| Max output current (-12V) | 0.3 A |
| Input current | 10 |
| AC input frequency | 50/60 |
| AC input voltage | 100 - 240 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Motherboard power connector | 20+4 pin ATX |
| Number of SATA power connectors | 8 |
| Peripheral (Molex) power connectors (4-pin) | 4 |
| CPU power connector (4+4 pin) | Yes |
| PCI Express power connectors (6+2 pin) | 4 |
| Cabling type | Fully-Modular |
| Motherboard power cable length | 600 mm |
| SATA power cable length | 950 |
| Peripheral (Molex) power cable length | 950 |
| PCI Express power connectors (16-pin) | 1 |
| Number of SATA power cables | 2 |

### Performance

| Feature | Value |
|---|---|
| Purpose | PC |
| 80 PLUS certification | 80 PLUS Gold |
| Bearing technology | FDB |
| ATX version | 3.1 |
| Power supply unit (PSU) form factor | ATX |

### Design

| Feature | Value |
|---|---|
| Fan diameter | 135 mm |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| On/off switch | Yes |
| Product colour | Silver, Black |
| Illumination | No |

### Certificates

| Feature | Value |
|---|---|
| Waste Electrical and Electronic Equipment (WEEE) compliance | Yes |
| Compliance certificates | KC, TÜV mark, cTUVus, RoHS, RCM, Low Voltage Directive (LVD), KCC, Federal Communications Commission (FCC), Electromagnetic Compatibility (EMC), EAC, CCC, CB, BSMI |

### Weight & dimensions

| Feature | Value |
|---|---|
| Height | 86 mm |
| Width | 150 mm |
| Depth | 140 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating temperature (T-T) | 0 - 50 |

### Packaging data

| Feature | Value |
|---|---|
| Package type | Box |

### Logistics data

| Feature | Value |
|---|---|
| Country of origin | China |
| Warranty period | 10 year(s) |

## FAQ

### How much does the Montech CENTURY II 850W Power Supply Unit cost, and is it available for purchase?

The price is 94.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 259 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 13.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Montech CENTURY II 850W Power Supply Unit be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Montech products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Montech service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: total power, motherboard power connector, 80 plus certification, fan diameter, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/11456400/68835347_large.webp