# Power Supply Unit Thermaltake SFX-850AH8FKG 850 W

**URL:** https://aio.lv/en/product--thermaltake-ps-stp-0850fnfage-1--7549939
**Data updated:** 2025-12-30 06:10 (EET)
**Category:** Power Supplies (PSU)
**Manufacturer:** THERMALTAKE
**Manufacturer code:** PS-STP-0850FNFAGE-1
**EAN:** 4713227535106
**Warranty:** 5 Years
**Availability:** Out of stock

## Summary description

The Thermaltake SFX-850AH8FKG is an 850 W power supply unit designed for PCs and servers. It features a 24-pin ATX connector, active cooling with a 9.2 cm fan, and 80 PLUS Gold certification for high efficiency. With an AC input voltage range of 100-240 V and a frequency of 50-60 Hz, it ensures stable power delivery. The PSU includes various cables: AC, CPU, PCIe, Peripheral (Molex), and SATA, with lengths suitable for most setups.

## Long description

The Thermaltake Toughpower SFX 850W Gold (model SFX-850AH8FKG) is a fully modular 850 W SFX power supply unit designed for small form-factor and ATX builds. It is 80 PLUS Gold certified, complies with Intel ATX 3.0 specifications and includes a native 16‑pin (12VHPWR) PCIe Gen 5.0 connector for next‑generation GPUs. The compact SFX form factor fits ITX and ATX cases and the unit ships with an SFX-to-ATX adapter bracket for flexible installation options.
Advantages
The PSU offers native PCIe Gen 5.0 support via a 16‑pin 12VHPWR connector capable of delivering up to 450 W to compatible graphics cards, full compatibility with Intel ATX 3.0 power‑timing and excursion requirements, and high energy efficiency with 80 PLUS Gold certification. It features low ripple noise (\<30 mV across +12V, +5V and +3.3V), strict voltage regulation (±2% on major rails), a minimum 17 ms hold‑up time at full load, and a high‑quality design with 100% Japanese 105°C electrolytic capacitors. The unit includes fully modular low‑profile flat cables, a 92 mm fluid dynamic bearing fan with Smart Zero Fan operation, and an SFX-to-ATX bracket for case compatibility.
Suitable for
Compact gaming PCs with PCIe Gen 5.0 graphics cards
Mini-ITX systems where space is limited
Small form-factor workstations requiring stable, high-current +12V supply
Upgrades to systems needing Intel ATX 3.0 compliance
Key specifications
Total power: 850 W
80 PLUS certification: 80 PLUS Gold
Motherboard connector: 24‑pin ATX
PCIe connector: Native 16‑pin (12VHPWR) supporting up to 450 W for GPU
Form factor: SFX (includes SFX-to-ATX adapter bracket)
Fan: 92 mm fluid dynamic bearing with Smart Zero Fan
Ripple noise: \<30 mV on +12V, +5V, +3.3V
Voltage regulation: \<±2% on major rails
Hold‑up time: ≥17 ms at 100% load
Capacitors: 100% Japanese 105°C electrolytic capacitors
Product colour: Black
Weight: 1 kg
How to use
Install the SFX power supply into your ITX or suitable ATX case using the included mounting hardware; if your case requires, attach the supplied SFX-to-ATX adapter bracket before mounting. Connect the 24‑pin ATX main power cable to the motherboard, attach CPU power and peripheral cables as required, and plug the native 16‑pin (12VHPWR) connector directly to a compatible PCIe Gen 5.0 GPU when needed. Use the modular cable selection to route low‑profile flat cables for improved airflow and tidy cable management. Observe standard safety precautions: power off and unplug the system before installation and ensure all connectors are fully seated.
Usage recommendations
For stable operation with high‑power graphics cards, follow the GPU manufacturer’s recommended wattage printed near the 12VHPWR connector and ensure your total system load stays within the 850 W rated capacity. Enable Smart Zero Fan behavior by allowing the PSU to operate under light loads to keep noise minimal; if sustained heavy loads are expected, verify case ventilation to maintain optimal cooling.

## Specifications

### Power

| Feature | Value |
|---|---|
| Total power | 850 W |
| Efficiency | 100 % |
| Power Factor Correction (PFC) type | Active |
| Hold time | 17 ms |
| Power protection features | Under power, Short circuit, Overheating, Over voltage, Over power, Over current |
| Combined power (+3.3V) | 100 W |
| Combined power (+12V) | 849.6 W |
| Combined power (+5V) | 100 W |
| Combined power (-12V) | 3.6 W |
| Combined power (+5Vsb) | 15 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 |
| Max output current (+5Vsb) | 3 A |
| Input current | 10 |
| AC input frequency | 50 - 60 |
| AC input voltage | 100 - 240 |

### Ports & interfaces

| Feature | Value |
|---|---|
| Motherboard power connector | 24-pin ATX |
| PCI Express connector | Yes |
| Floppy drive power connector | 1 |
| Number of SATA power connectors | 8 |
| Peripheral (Molex) power connectors (4-pin) | 4 |
| PCI Express power connectors (6+2 pin) | 2 |
| Cabling type | Fully-Modular |
| Motherboard power cable length | 300 mm |
| SATA power cable length | 300, 150 |
| Peripheral (Molex) power cable length | 300, 150 |
| PCI Express power cable length | 400 mm |
| Floppy disk drive cable length | 150 mm |
| PCI Express power connectors (16-pin) | 1 |

### Performance

| Feature | Value |
|---|---|
| Purpose | PC/Server |
| 80 PLUS certification | 80 PLUS Gold |
| Mean time between failures (MTBF) | 10000 h |
| Noise level | 29.8 dB |
| Bearing technology | FDB |
| ATX version | 3.0 |
| Silent mode | Yes |
| Supported motherboard form factors | Mini-ITX, Mini-ATX, Micro ATX, ATX |
| Power supply unit (PSU) form factor | SFX |

### Design

| Feature | Value |
|---|---|
| Fan diameter | 92 mm |
| Number of fans | 1 fan(s) |
| Cooling type | Active |
| Fan location | Top |
| On/off switch | Yes |
| Product colour | Black |

### Certificates

| Feature | Value |
|---|---|
| Compliance certificates | CB, CCC, CE, Federal Communications Commission (FCC), Low Voltage Directive (LVD) |

### Technical details

| Feature | Value |
|---|---|
| Sustainability compliance | Yes |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 1 kg |
| Height | 63.5 mm |
| Width | 125 mm |
| Depth | 100 mm |

### Operational conditions

| Feature | Value |
|---|---|
| Operating relative humidity (H-H) | 5 - 85 |
| Storage temperature (T-T) | -40 - 70 |
| Operating temperature (T-T) | 0 - 45 |
| Storage relative humidity (H-H) | 5 - 95 |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | SATA, Peripheral (Molex), PCIe, CPU, AC |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### 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 THERMALTAKE 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 THERMALTAKE 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 Thermaltake SFX-850AH8FKG?

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

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