The Sharkoon Rebel P20 Gen2 is available now, and the 750-watt version costs 79.90 euros. The power supply complies with ATX 3.1, holds Cybenetics Gold certification, and features a native 12V 2×6 rail with a 600-watt load capacity. It is available in three power levels—750, 850, and 1,000 watts—all with fully modular cabling.
But the real news is on the price tag. The first Rebel P20 launched at 109.90 euros for the 750-watt model and 159.90 euros for the 1,000-watt model. The Gen2 undercuts that by 30 to 60 euros per model, and if you compare the Cybenetics report on the 750-watt model with that of its predecessor, you’ll see exactly where this price comes from.
TL;DR: The most important points in a nutshell
- Variants: 750 W (79.90 euros), 850 W (89.90 euros), 1,000 W (99.90 euros), available now
- Colors: All models in black; the 850-watt version is also available in white
- Standard: ATX 3.1, Cybenetics Gold, one native 12V 2×6 connector rated at 600 watts
- Cables: fully modular, flat cables, longest strand 97 cm
- Fan: 120 mm with Zero-RPM mode, operates passively up to approximately 225 watts load
- Efficiency: 90.14 percent on average at 230 volts, measured by Cybenetics on the 750-watt model
- The catch: significantly louder than its predecessor, only three 6+2-pin PCIe connectors and seven SATA ports
Rebel P20 Gen2 vs. Rebel P20: What Sharkoon Has Cut
The “Gen2” suffix sounds like a technical update, but it’s primarily a repositioning toward the lower end of the market. The first generation of the Rebel P20 covered four power levels up to 1,200 watts, and the two largest models were Cybenetics Platinum-certified. The Gen2 tops out at 1,000 watts and maintains Gold certification across the board.
Sharkoon has also scaled back on the number of ports. Whereas the old P20 featured four 6+2-pin PCIe connectors and eleven SATA ports, the new model now has three and seven, respectively. For a standard gaming PC with one graphics card and two to three drives, this isn’t an issue. However, if you plan to power four SATA SSDs, multiple hard drives, and a fan controller, you should check the number of ports beforehand.
| Feature | Rebel P20 (Gen1) | Rebel P20 Gen2 |
|---|---|---|
| Power Levels | 750, 850, 1,000, 1,200 W | 750, 850, 1,000 W |
| Certification | Cybenetics Gold; Platinum for 1,000 W and above | Cybenetics Gold |
| PCIe 6+2-pin | 4 | 3 |
| SATA | 11 | 7 |
| Fan Bearing (Manufacturer’s Specification) | Fluid Dynamic Bearing | Hybrid magnetic bearing |
| Efficiency at 750 W at 230V1 | 90.74% | 90.14% |
| Noise Level 750 W at 230V1 | 10.00 dB(A) | 34.01 dB(A) |
| MSRP at launch (750 / 1,000 W) | 109.90 / 159.90 euros | 79.90 / 99.90 euros |
1 Average values from the Cybenetics reports for the respective 750-watt model, measured across the entire load range at an ambient temperature of 30 to 32 degrees.
The fan is the big difference
In terms of efficiency, the two generations are practically neck and neck. Not so with noise levels: Cybenetics measured an average of 10.00 dB(A) at 230 volts for the first Rebel P20 750, compared to 34.01 dB(A) for the Gen2. Both measurements were conducted in the same setup at an ambient temperature of 30 to 32 degrees, so the comparison is reliable.
The reason lies in the fan curve. Up to 30 percent load—that is, up to about 225 watts—the fan remains completely still thanks to Zero-RPM mode. At 40 percent load, it jumps directly to 1,465 RPM and 38.1 dB(A), without the gradual ramp-up typically found in more expensive power supplies. Beyond that, there is hardly any further change.
| Load (750-W model) | Fan Speed | Noise Level |
|---|---|---|
| 10 to 30% (75 to 225 W) | 0 rpm | less than 6.0 dB(A) |
| 40% (300 W) | 1,465 rpm | 38.1 dB(A) |
| 60% (450 W) | 1,729 rpm | 42.6 dB(A) |
| 100% (750 W) | 1,769 rpm | 44.1 dB(A) |
In practical terms, this means: As long as your system stays below about 225 watts, you won’t hear the power supply at all. As soon as a game pushes the graphics card to its limits and system performance climbs above this threshold, the fan kicks in. In a sound-insulated case with other fans, the noise gets lost in the background; in a quiet office build or with an open mesh case, it stands out. Those who buy plenty of headroom and rarely draw more than 200 watts benefit twice over here.
Something else stands out: Sharkoon lists a hybrid magnetic bearing in the spec sheet, whereas the Cybenetics report lists the installed POWERYEAR PY-1225H12S as a sleeve-bearing fan. It’s impossible to tell which is correct just by looking at it; clarification from the manufacturer would be helpful here.
Efficiency and Voltage Quality in the Cybenetics Report
The Cybenetics report on the Rebel P20 Gen2 750 was issued on January 27, 2026, and is publicly available. Cybenetics measures over 1,450 load combinations, rather than the three to four measurement points that are standard for 80 PLUS. The figures are therefore more meaningful than any manufacturer’s specifications.
At 115 volts, the power supply achieves an average efficiency of 88.03 percent; at 230 volts, it reaches 90.14 percent. For you in Germany, the second value is the one that matters. The Gold rating is accurate for both line voltages; for Platinum at 230 volts, it falls just short by one percentage point.
The voltage quality looks clean. The deviation on the 12-volt rail ranges from 1.23 to 1.25 percent, and the residual ripple under full load is between 46 and 50 millivolts. The ATX standard allows for 120 millivolts here, so the power supply remains well below that limit. However, the first Rebel P20 was even better, with a deviation of 0.73 to 0.96 percent. In standby mode, the unit draws 0.147 watts at 230 volts—significantly less than the 0.25 watts that Sharkoon lists as the maximum in the datasheet. No Cybenetics reports are yet available for the 850- and 1,000-watt models.
Connectors: three PCIe connectors, one 12V 2×6 connector rated at 600 watts
All three models share the same cable configuration: one 24-pin motherboard cable, two 4+4-pin CPU connectors, three 6+2-pin PCIe connectors, one native 12V 2×6 connector, seven SATA connectors, and one IDE connector. The cables are flat and can be neatly tucked away behind the power supply cover. The longest cable measures 97 cm, the motherboard cable 60 cm, and the CPU cable 70 cm.
Two CPU connectors are required for motherboards with dual EPS power supply. More important is the native 12V 2×6 connector, which Sharkoon specifies as 600 watts. It saves you from having to use an adapter, which, with older power supplies, combines three or four 8-pin connectors into a single 12+4-pin connector. A single, continuous cable requires fewer connectors, and each connector is a potential point where the connection might be loose.
It only gets tight in one scenario: With a graphics card featuring three standard 8-pin connectors, all three PCIe lanes are occupied, leaving nothing available for case fan hubs or AIO pumps with PCIe connectors. For RTX 50 series cards that use the 12V-2×6 connector, this isn’t an issue.
With the 60 cm long 12V-2×6 cable, it’s worth taking a look at the case. In large towers with the power supply at the bottom and the graphics card in the top slot, space can be tight, especially if the cable is routed behind the motherboard. In mid-towers like the Sharkoon S25 series cases, the length is sufficient.
Technical Specifications of the Rebel P20 Gen2 Series
| Specifications | Rebel P20 Gen2 750 | Rebel P20 Gen2 850 | Rebel P20 Gen2 1000 |
|---|---|---|---|
| Continuous Power | 750 W | 850 W | 1,000 W |
| +12 V (single rail) | 62.5 A | 70.8 A | 83.3 A |
| +3.3 V / +5 V | 18 A each, combined max. 100 W | ||
| Certification | Cybenetics Gold, ATX 3.1 | ||
| Input voltage | 100 to 240 V AC | ||
| Cable management | Fully modular, flat cables, max. 97 cm | ||
| 24-pin / 4+4-pin CPU | 1 (60 cm) / 2 (70 cm) | ||
| 12V-2×6 / 6+2-pin PCIe | 1 (60 cm, 600 W) / 3 (60 cm) | ||
| SATA / IDE | 7 / 1 | ||
| Fan | 120 mm, hybrid magnetic bearing according to Sharkoon, Zero-RPM mode | ||
| Capacitors | Exclusively Japanese capacitors | ||
| Protection circuits | OCP, OVP, UVP, SCP, OTP, OPP | ||
| Dimensions (D × W × H) | 140 × 150 × 86 mm | ||
| Weight (without cable) | 1.264 kg | 1.342 kg | 1.374 kg |
| MTBF | at least 100,000 hours | ||
| Operating temperature | 0 to +40 °C | ||
| Standby power consumption | Max. 0.25 W | ||
| EAN (Black) | 4044951045907 | 4044951045914 | 4044951045938 |
| MSRP | 79.90 euros | 89.90 euros | 99.90 euros |
The white 850-watt version is listed under EAN 4044951045921 and is technically identical to the black model. With an installation depth of 140 mm, the series adheres to the ATX standard and thus fits even in compact midi towers where a high-end power supply with a depth of 160 mm or 180 mm would collide with the hard drive cage.
Pricing and Availability
The three models are available now. The MSRP is 79.90 euros for the 750-watt model, 89.90 euros for the 850-watt model, and 99.90 euros for the 1,000-watt model. All models come in black; the 850-watt version is also available in white. Sharkoon does not specify a warranty period on the product page or in the datasheet, and Cybenetics does not provide this information either.
This places the Rebel P20 Gen2 squarely in the middle of a highly competitive segment. At a similar price point, it competes with products such as the ASRock PRO Series, which also uses ATX 3.1 and lists PCIe 5.1 in its spec sheet. Those who need more power will find what they’re looking for in the next higher class, such as the be quiet! Power Zone 2 and Pure Power 13 M with 1,200 watts.
FAQ on the Sharkoon Rebel P20 Gen2
How much does the Sharkoon Rebel P20 Gen2 cost?
The MSRP is 79.90 euros for the 750-watt model, 89.90 euros for the 850-watt model, and 99.90 euros for the 1,000-watt model. All three models are available now.
What’s the difference from the first Rebel P20?
The Gen2 does not include the 1,200-watt model or the Platinum certification found on the larger variants. It has one fewer PCIe connector and four fewer SATA ports, and it runs noticeably louder under load. However, it costs 30 to 60 euros less than the first generation did at launch.
Is a 12V 2×6 connector enough for my graphics card?
Yes. Current consumer graphics cards use at most one 12V 2×6 connector, and Sharkoon specifies the connector’s capacity as 600 watts. This also covers an RTX 5090 with a 575-watt TBP. In addition, three 6+2-pin PCIe power connectors are available.
What wattage class do I need?
For a computer with a mid-range graphics card and an 8-core CPU, 750 watts is sufficient. If you have a graphics card with a power draw of 300 to 400 watts, an 850-watt power supply will give you more breathing room. Of the three models, only the 1,000-watt power supply is suitable for an RTX 5090.
How loud is the power supply?
Cybenetics measured an average of 34.01 dB(A) at 230 volts for the 750-watt model. The fan remains silent up to a load of about 225 watts; at 300 watts and above, it spins at 1,465 RPM and 38.1 dB(A), and at full load, it spins at 1,769 RPM and 44.1 dB(A).
How long is the warranty?
Sharkoon does not provide this information in the datasheet. The MTBF of at least 100,000 hours serves as a reference point, though it does not indicate the warranty period.
Conclusion
The Rebel P20 Gen2 isn’t a successor in the traditional sense, but rather a more affordable take on the same concept. ATX 3.1, a native 12V 2×6 connector rated at 600 watts, and fully modular flat cables for 79.90 euros make for a compelling offer, and the Cybenetics report confirms—with 90.14 percent efficiency at 230 volts and a solid 12-volt rail—that the technology behind it is sound.
The trade-off is noise. An average of 34 dB(A) compared to 10 dB(A) for its predecessor isn’t a rounding error—it’s a deliberate choice in favor of the more affordable fan and a more aggressive fan speed curve. If your computer stays below 225 watts most of the time or is housed in a sound-insulated case anyway, you’ll hardly notice it and you’ll get a good deal price-wise. If you’re building a truly quiet system, you should keep an eye out for the first-generation Rebel P20 on sale or go for a higher-end model.
Sources: Sharkoon (Rebel P20 Gen2, Black), Sharkoon (850 W, White)
