# Power Supply Unit Zalman ZM850-ARX 850 W

**URL:** https://aio.lv/en/product--zalman-zm850-arx--3559973
**Data updated:** 2025-12-29 13:32 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** ZALMAN
**Manufacturer code:** ZM850-ARX
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 170.49 €
**Prices and availability valid until:** 2026-08-02 23:59
**Price without VAT (21%):** 140.90 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--zalman-zm850-arx--3559973

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.89 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

The Zalman ZM850-ARX is a high-performance 850 W power supply unit designed for PCs. It features a 20+4 pin ATX connector, with a 60 cm motherboard power cable and a 55 cm PCI Express power cable. With an AC input voltage range of 100-240 V and a frequency of 50-60 Hz, it ensures compatibility with various systems. The PSU is 80 PLUS Platinum certified, ensuring high energy efficiency. It has an active cooling system with a 13.5 cm fan for optimal thermal management. The unit comes in a sleek black finish and includes necessary AC cables.

## Long description

The Zalman ZM850-ARX 850 W power supply unit delivers stable, high-efficiency power for desktop PCs. Designed with high-quality Japanese 105°C capacitors, an 80 PLUS Platinum efficiency rating and a single +12V rail, the unit supports demanding systems while maintaining reliable voltage regulation. The modular cable design and a quiet 135 mm fan simplify system building and improve internal airflow.
Advantages
High-quality components and a dedicated DC-DC module provide reliable performance under heavy load. Built-in Active PFC increases power factor and overall efficiency. Comprehensive secondary protection ICs guard against over-current, over-power, over-voltage, under-voltage, over-temperature and short-circuit conditions. The modular cables and compact black housing help with tidy installation and improved cooling.
Suitable for
 Gaming PCs and high-performance workstations
 Systems with multiple PCIe devices and high power draw
 Upgrades where efficient, stable 12V power is required
Key specifications
 Total power: 850 W
 Efficiency: 80 PLUS Platinum (up to 94%)
 Motherboard connector: 20+4 pin ATX
 Fan diameter: 135 mm (active cooling)
 Input: 100–240 V AC, 50–60 Hz
 Product colour: Black
 Weight: 2.95 kg
How to use
Install the Zalman ZM850-ARX into a compatible PC case following the motherboard and case manufacturer guidelines. Connect the 20+4 pin ATX cable to the motherboard and attach modular PCIe, SATA and peripheral cables as required. Ensure the AC input cable is connected to a properly rated mains outlet. Configure the system and verify stable power delivery under normal and load conditions.
Usage recommendations
For best results, pair this 850 W PSU with systems that demand high sustained 12V power and use quality modular cabling to maintain unobstructed airflow. Keep the PSU intake and exhaust clear and perform periodic dust cleaning of the 135 mm fan.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 850 W |
| Efficiency | 94 % |
| Power Factor Correction (PFC) type | Active |
| Power protection features | Over power, Over voltage, Overheating, Short circuit, Under voltage, Over current |
| Combined power (+3.3V) | 120 W |
| Combined power (+12V) | 840 W |
| Combined power (+5V) | 120 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 12.5 W |
| Max output current (+3.3V) | 25 A |
| Max output current (+12V) | 70 A |
| Max output current (+5V) | 22 A |
| Max output current (-12V) | 0.3 A |
| Max output current (+5Vsb) | 2.5 A |
| AC input frequency | 50 - 60 |
| AC input voltage | 100 - 240 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Motherboard power connector | 20+4 pin ATX |
| Floppy disk drive connector | Yes |
| Number of SATA power connectors | 12 |
| Peripheral (Molex) power connectors (4-pin) | 8 |
| EPS power connector (8-pin) | Yes |
| CPU power connector (4+4 pin) | Yes |
| PCI Express power connectors (6+2 pin) | 6 |
| Cabling type | Fully-Modular |
| Motherboard power cable length | 600 mm |
| CPU power cable length | 700 mm |
| PCI Express power cable length | 550 mm |

### Performance

| Feature | Value |
|---|---|
| Purpose | PC |
| 80 PLUS certification | 80 PLUS Platinum |
| Power supply unit (PSU) form factor | ATX |

### Design

| Feature | Value |
|---|---|
| Fan diameter | 135 mm |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Fan location | Top |
| Product colour | Black |

### Certificates

| Feature | Value |
|---|---|
| Certification | UL, FCC, CB, CE, EAC, KC, WEEE |
| Compliance certificates | RoHS |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 2.95 kg |
| Height | 86 mm |
| Width | 150 mm |
| Depth | 180 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 95 |
| Storage temperature (T-T) | -20 - 70 |
| Operating temperature (T-T) | 0 - 40 |
| Storage relative humidity (H-H) | 5 - 95 |

### Packaging data

| Feature | Value |
|---|---|
| Manual | Yes |
| Package type | Box |
| Number of straps | 5 |
| Cable storage bag included | Yes |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | AC |

### Other features

| Feature | Value |
|---|---|
| Number of screws | 4 |
| Screws included | Yes |
| Cable ties included | Yes |

## FAQ

### How much does the Power Supply Unit Zalman ZM850-ARX cost, and is it available for purchase?

The price is 170.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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 20.07.2026 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 Power Supply Unit Zalman ZM850-ARX 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 ZALMAN 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 ZALMAN 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, efficiency, motherboard power connector, 80 plus certification, fan diameter, weight, 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.

### Where can I download the instructions for Power Supply Unit Zalman ZM850-ARX?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/3559973/64787301_large.webp