The Sharkoon Rebel P20 SFX 850 is a strong small factor PSU, ideal for potent gaming systems hosted in tiny chassis, where a normal ATX PSU isn’t an option.
The Sharkoon Rebel P20 SFX 850 is included in my best ATX v3.x & PCIe 5.x PSU picks article.
Sharkoon released two new power supply lines: one with normal-size ATX members and one with small-form-factor SFX models. I have already evaluated the ATX line and the strongest SFX model. In today’s review, I will evaluate the second strongest Sharkoon SFX model, with 850W max power.
- Sharkoon Rebel P20 1200W ATX v3.1 PSU Review
- Sharkoon Rebel P20 1000W ATX v3.1 PSU Review
- Sharkoon Rebel P20 850W ATX v3.1 PSU Review
- Sharkoon Rebel P20 750W ATX v3.1 PSU Review
- Sharkoon Rebel P20 SFX 1000W ATX v3.1 PSU Review
Andyson makes all Rebel P20 units, while the Rebel P20 SFX models use Sirfa’s platforms. Like the ATX models, the SFX ones feature a fully modular cable design, and they are all rated by Cybenetics, achieving Platinum efficiency, Standard++ (1000W and 850W), and A- (750W) noise ratings. The prices are increased because the smaller the form factor, the higher the cost, with the P20 SFX 850 currently sold at 170 euros in the EU market. None of the Sharkoon units are available in the US market, and I don’t know if this will change in the future.
- Manufacturer (OEM): Sirfa
- Max Power: 850W
- Cybenetics Efficiency: [115V] Cybenetics Platinum (89-91%) [230V] Cybenetics Platinum (91-93%)
- Noise: Cybenetics Standard++ (30-35 dB[A])
- Compliance: ATX v3.1, SFX12V 4.1
- Operating Temperature (Continuous Full Load): 0 – 40 °C
- Alternative Low Power Mode support: Yes
- Power 12V combined: 850W
- Number of 12V rails: 1
- Power 5V + 3.3v: 100W
- Power 5VSB: 15W
- Cooling: 92mm Fluid Dynamic Bearing Fan (S0921512HHB)
- Semi-Passive Operation: ✓ (selectable)
- Modular Design: Yes (Fully)
- High Power Connectors: 2x EPS (2x cables), 2x PCIe 6+2 pin (1x cable), 1x PCIe 12+4 pin (450W)
- Peripheral Connectors: 8x SATA (2x cables), 1x 4-pin Molex (adapter)
- ATX Cable Length: 300mm
- EPS Cable Length: 420mm
- 6+2 pin PCIe Cable Length: 420+150mm
- 12+4 pin PCIe Cable Length: 430mm
- Distance between SATA / 4-pin Molex: 150mm / +155mm
- In-cable capacitors: No
- Dimensions (W x H x D): 125 x 65 x 100mm
- Weight: 1.02 kg (2.25 lb)
- Warranty: 2-years
- MSRP (including VAT): 170€
Power Specifications
| Rail | 3.3V | 5V | 12V | 5VSB | -12V | |
| Max. Power | Amps | 20 | 20 | 70.8 | 3 | 0.3 |
| Watts | 100 | 850 | 15 | 3.6 | ||
| Total Max. Power (W) | 850 | |||||
The transformer’s visual impact is remarkable, but it is the optical effect compared to the size of the power supply. Seeing 1200w from such a small 850w power supply always makes a certain sense.