The Sharkoon Rebel P20 1200 is an affordable high-power power supply that complies with the latest ATX specifications (v3.1) and can deliver double the power for a short time if required. Reason enough for me to once again let my friend Aris from Hardwarebusters have his say (and picture) on our site, as he has not only tested this power supply intensively, but has also officially certified it through his company Cybenetics. As it will certainly be of interest to you, I am happy to offer him the platform to share his findings with you here on a case-by-case basis. And don’t forget, his website and YouTube channel also offer real gems in terms of really well-founded reviews! The power supply is also featured in his article on the best ATX v3.x & PCIe 5.x power supplies. And please don’t be surprised, as always Aris writes in the “you” style, which I don’t want to change afterwards.
Sharkoon has taken a bold step in the power supply arena by launching two series simultaneously, one with full-size ATX power supplies and one with small form factor SFX models. I’ll be testing them all in due course, starting with the flagship 1200W Rebel P20 model. Andyson is the original equipment manufacturer of all the Rebel P20 units, who as a company suffered so much last year from EVGA’s problems that they almost ceased operations. It’s good to see Andyson back on their feet and I hope there will be no more problems with this manufacturer as I like their attitude and cooperative spirit.
The Rebel P20 1200 is a fully modular device with ultra-compact dimensions thanks to its shallow depth of 140 mm. As I have mentioned several times in previous reviews, I am not a fan of small power supplies, as the small dimensions usually affect the noise level. With this device, the average noise level is within 30-35 dBA (Cybenetics standard), which is quite acceptable considering the maximum output of 1200 W. When a powerful PSU delivers high loads, the overall system noise level is high as the CPU and GPU cooling solutions are stressed, unless a customized and powerful liquid cooling system is used for both. This means that even if the PSU runs quietly under heavy load, you can’t expect the other PC parts to do the same.
| Manufacturer (OEM): | Andyson |
| Max Power: | 1200W |
| Cybenetics Efficiency: | Cybenetics Efficiency: [115V] Cybenetics Platinum (89-91%) [230V] Cybenetics Platinum (91-93%) |
| 80 Plus Efficiency: | n.a. |
| Noise: | Noise: Cybenetics Standard (30-35 dB[A]) |
| Compliance: | ATX v3.1, EPS 2.92 |
| Operating Temperature: | 0-40 °C (Continuous Full Load) |
| Alternative Low Power Mode support: | Yes |
| Power 12V: | 1200 W on one single rail |
| Power 5V 3.3v: | 100 W |
| Power 5VSB: | 15 W |
| Cooling: | 120mm Fluid Dynamic Bearing Fan (HA1225H12F-Z) |
| Semi-Passive Operation: | Yes (selectable) |
| Modular Design: | Yes |
| High Power Connectors: | 2x EPS (2x cables), 4x PCIe 6 2 pin (2x cables), 1x PCIe 12 4 pin (600W) |
| Peripheral Connectors: | 11x SATA (3x cables), 8x 4-pin Molex (2x cables) |
| Cable Length: | ATX Cable Length: 600 mm EPS Cable Length: 7000 mm 6 2 pin PCIe Cable Length: 550 mm 12 4 pin PCIe Cable Length: 600 mm |
| Distance between SATA/Molex connectors: | 150/150 mm |
| In-cable capacitors: | No |
| Dimensions (W x H x D): | 150 mm x 85 mm x 140 mm |
| Weight: | 1.67 kg (3.68 lb) |
| Warranty: | 2 years |
Power Specifications
| Rail | 3.3V | 5V | 12V | 5VSB | -12V | |
| Max. Power | Amps | 20 | 20 | 100 | 3 | 0.3 |
| Watts | 100 | 1200 | 15 | 3.6 | ||
| Total Max. Power (W) | 1200 | |||||
Sharkoon Rebel P20 1200W ATX 3.1
 | in 2-4 Tagen lieferbar | 179,90 €*Stand: 20.04.25 15:18 |
 | Onlineshop: lagernd, 24-h Service möglich, Lieferung 2-3 WerktageHannover/Laatzen: lagernd (keine Online-Reservierung möglich)Berlin, Dortmund, Düsseldorf, Hamburg, München, Stuttgart: nicht lagerndStand: 20.04.25 14:20 | 179,90 €*Stand: 20.04.25 14:22 |
 | Lager Lieferant: Sofort lieferbar, 2-4 Werktage | 180,34 €*Stand: 20.04.25 14:52 |
- 1 - Introduction, overview and technical data
- 2 - Unboxing, cables and protective circuits
- 3 - Teardown: Topology, components, processing
- 4 - Load Regulation, Ripple Suppression
- 5 - Transient Response
- 6 - Hold-Up Time, Timings, Inrush-Current
- 7 - Average Efficiency and PF
- 8 - Noise and fan speed
- 9 - Summary and conclusion
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