1. Ro-ràdh
This manual provides detailed instructions for the installation, operation, and maintenance of your FSP Dagger Pro 850W SFX Power Supply. The FSP Dagger Pro series is designed for small form factor (SFX) systems, offering high efficiency and reliable power delivery for demanding components.
Key features of the FSP Dagger Pro 850W SFX Power Supply include:
- ATX 3.1 / PCIe 5.1 Compliance: Equipped with a native 12VHPWR connector and cable, supporting the latest generation hardware power demands.
- Dealbhadh làn mhodular: Allows for connecting only necessary cables, improving airflow and reducing cable clutter within compact PC builds.
- Compact SFX Form Factor: Compatible with most Mini-ITX and Micro ATX cases, ideal for small form factor PCs.
- Èifeachdas Teisteanas Òir 80 PLUS: Achieves over 90% efficiency at typical loads, contributing to lower power consumption, reduced heat output, and quieter operation.
- Single +12V Rail Design: Provides full power to VGA cards individually, preventing overloading conditions.

Image 1.1: FSP Dagger Pro 850W SFX Power Supply, showcasing its compact design and modular cable interface.
2. Fiosrachadh Sàbhailteachd
WARNING: Improper installation or use can result in serious injury or damage to equipment. Please read and follow all instructions carefully.
- Always disconnect the power cord from the wall outlet before installing, removing, or cleaning the power supply.
- Na fosgail an aonad solarachaidh cumhachd. Fuaim àrdtagTha pàirtean ann a-staigh, agus chan eil pàirtean ann a dh’ fhaodas an neach-cleachdaidh a chàradh. Ma dh’fhosglas tu an aonad, cuiridh sin às don bharantas.
- Ensure the power supply is installed in a well-ventilated area. Do not block any ventilation openings.
- Use only the modular cables provided with this power supply. Using third-party cables may cause damage to the PSU or connected components.
- This product is designed for use in computer systems. Do not use it for any other purpose.
- Keep the power supply away from water, moisture, and extreme temperatures.
3. Pasgan-susbaint
Dèan cinnteach gu bheil na nithean a leanas anns a’ phacaid agad:
- FSP Dagger Pro 850W SFX Power Supply Unit
- Modular Cable Set (including 12VHPWR, Motherboard 24-pin, CPU 8-pin, PCIe 6+2-pin, SATA, Peripheral)
- Corda cumhachd AC
- Sgriubha stàladh
- Leabhar-làimhe cleachdaiche (an sgrìobhainn seo)

Image 3.1: Illustration of the compact dimensions of the Dagger Pro PSU and the included modular cable set.
4. Setup agus Stàladh
Follow these steps to install your FSP Dagger Pro 850W SFX Power Supply into your computer system.
4.1. Stàladh Corporra
- Ullaich an siostam agad: Ensure your computer is powered off and the power cord is disconnected from the wall outlet. Open your computer case to access the power supply mounting area.
- Remove old PSU (if applicable): If replacing an existing power supply, disconnect all cables from components and remove the old PSU from the case.
- Mount the new PSU: Carefully place the FSP Dagger Pro 850W into the SFX power supply bay of your case. Secure it using the provided mounting screws. Ensure the fan is oriented correctly for optimal airflow, typically facing inwards or downwards depending on case design.

Image 4.1: The FSP Dagger Pro PSU mounted in a system, highlighting the rear power switch and AC input.
4.2. Ceanglaichean càball
The Dagger Pro 850W is a fully modular power supply. Connect only the cables required for your system components.

Ìomhaigh 4.2: Mion-fhiosrachadh view of the modular cable connection panel on the PSU.
- Motherboard Power (24-pin): Connect the 24-pin ATX cable from the PSU to the corresponding port on your motherboard. Ensure it clicks into place.
- CPU Power (4+4-pin or 8-pin): Connect the CPU power cable(s) from the PSU to the CPU power connector(s) on your motherboard. High-end motherboards may require two 8-pin connectors.
- PCIe Power (6+2-pin or 12VHPWR):
- For graphics cards requiring 6-pin or 8-pin PCIe connectors, use the provided 6+2-pin cables.
- For NVIDIA RTX 40 series graphics cards or other GPUs requiring the new 12VHPWR connector, use the dedicated 12VHPWR cable. Ensure it is fully seated into both the PSU and the graphics card.

Image 4.3: The 12VHPWR connector on the Dagger Pro PSU, designed for modern high-power graphics cards.
- Cumhachd SATA: Ceangail càbaill cumhachd SATA ris na SSDan, na HDDan, agus na draibhearan optigeach agad.
- Peripheral Power (Molex): Connect peripheral power cables for case fans, fan controllers, or other accessories that use Molex connectors.
- Riaghladh càbaill: Stiùirich càbaill gu grinn gus sruth-adhair agus bòidhchead a leasachadh taobh a-staigh do chùis.
5. Stiùireadh Obrachaidh
Once all components are connected and secured, you can power on your system.
- Ceangail AC Power: Plug the AC power cord into the power supply's inlet and then into a wall outlet or surge protector.
- Power On PSU: Flip the power switch on the back of the power supply to the "ON" (I) position.
- Siostam Cumhachd air: Brùth am putan cumhachd air cùis a’ choimpiutair agad.
5.1. Fan Operation (Semi-Fanless Mode)
The FSP Dagger Pro 850W features a semi-fanless design for optimized low-noise operation. The fan will remain off (0dBA) under low load conditions (typically below 20% load or <25°C internal temperature). As the load increases, the fan will gradually spin up to maintain optimal temperatures, ensuring quiet operation when not under heavy demand.

Image 5.1: Fan operation curve illustrating the semi-fanless mode for reduced noise at low loads.
6. Cumail suas
Nì cumail suas ceart cinnteach gum mair an solar cumhachd agad fad-beatha agus gum bi e ag obair gu math.
- Glanadh: Periodically clean the exterior of the power supply and its fan grill to prevent dust buildup. Use compressed air to gently clear dust from the fan and vents. Always disconnect the power cord before cleaning.
- Sruth-adhair: Ensure that the power supply's intake and exhaust vents are not obstructed. Maintain good airflow within your computer case to prevent overheating.
- Sgrùdadh càball: Thoir sùil bho àm gu àm air a h-uile ceangal càball gus dèanamh cinnteach gu bheil iad tèarainte agus saor bho mhilleadh.
7. A ’dèanamh trioblaid
If you encounter issues with your FSP Dagger Pro 850W power supply, refer to the following common problems and solutions:
| Trioblaid | Adhbhar a dh’fhaodadh a bhith ann | Fuasgladh |
|---|---|---|
| Chan eil cumhachd aig an t-siostam. |
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| Bidh an siostam a’ tòiseachadh ach a’ dùnadh sìos sa bhad. |
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| Chan eil fan a’ snìomh. |
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If the problem persists after trying these solutions, please contact FSP customer support.
8. Sònrachaidhean
Detailed specifications for the FSP Dagger Pro 850W SFX Power Supply (SDA2-850-G5):
| Feart | Mion-fhiosrachadh |
|---|---|
| Ainm Modail | SFX PSU |
| Àireamh Modail Nì | SDA2-850-G5 |
| Factor foirm | SFX |
| Toradh Wattage | 850 watt |
| Teisteanas 80 PLUS | òr |
| Inbhe ATX | ATX 3.1 |
| Inbhe PCIe | PCIe 5.1 (with native 12VHPWR) |
| Modalachd | Modular làn |
| Modh fuarachaidh | Air (92mm fan, semi-fanless) |
| Meudan toraidh (L x W x H) | 5 x 4 x 2.5 òirleach (125 x 100 x 63.5 mm) |
| Cuideam nì | 4.51 not (2.05 cileagram) |
| Innealan co-fhreagarrach | Computer, PC |
| Dèanadair | FSP Group U.S.A |

Image 8.1: Explanation of the single +12V rail design for stable power to VGA cards.
9. Barantas agus Taic
The FSP Dagger Pro 850W SFX Power Supply comes with a Barantas an neach-dèanamh 10-bliadhna, a’ dèanamh cinnteach à earbsachd agus fois inntinn san fhad-ùine. Tha am barantas seo a’ còmhdach lochdan ann an stuthan agus obair-ciùird fo chleachdadh àbhaisteach.
For technical support, warranty claims, or further assistance, please visit the official FSP weblàrach-lìn no cuir fios chun roinn seirbheis teachdaiche aca. Cùm dearbhadh do cheannach airson dearbhadh barantais.
FSP Official Weblàrach: https://www.fsplifestyle.com/