The Cooler Master X Silent Edge 1100W is the strongest passively cooled PSU up-to-date, delivering up to 1100W at 230V and up to 850W at 115V. This PSU uses a unique cooling solution, designed and manufactured by Cooler Master.
The Cooler Master X Silent Edge 1100W will be included in my best ATX v3.x & PCIe 5.x PSU picks article.
Cooler Master is an expert in cooling solutions, so I am eager to check out their first passively cooled unit, the X Silent Edge. This PSU promises high performance and insane power levels for a passive PSU. It uses an in-house platform, and according to CM, everything is made by its own production lines, including the chassis, all relevant cooling parts, and the PCB.
So far, users who wanted a strong, at the same time dead silent PSU didn’t have any options, especially if they also wanted an ATX v3.1 compliant unit. This changes with the X Silent Edge model, which uses a specially designed chassis with an embedded cooling solution to remove the heat from the PSU’s internals. This advanced cooling system allows for increased power levels without the need for forced cooling.
X Silent Edge 1100W Key Features
- Fanless Design
- Advanced Heat Pipe Technology
- Digital Monitoring: Features a digital monitor for real-time temperature and load tracking.
- High-Quality Components
- MasterCTRL Software Integration: Allows users to monitor and manage PSU parameters from their desktops
- Energy Efficiency: Incorporates an active bridge rectifier for improved efficiency and performance.
ATX v3.1 1000W PSU Reviews:
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- 1st Player NGDP 1000W PSU Review
- Cougar GEX X2 1000W PSU Review
- be quiet! Dark Power 13 1000W PSU Review
- Vetroo 1000W ATX v3.0 PSU Review
- FSP Hydro Ti Pro 1000W PSU Review
- Super Flower Leadex VII Gold 1000W (SF-1000F14XG) PSU Review
- Montech Titan Gold 1000W PSU Review
- be quiet! Pure Power 11 FM 1000W PSU Review
- Thermaltake Toughpower GF3 1000W ATX v3.0 PSU Review
- FSP Hydro G Pro 1000W ATX v3.0 PSU Review
- Sharkoon Rebel P20 1000W ATX v3.1 PSU Review
- Manufacturer (OEM): Cooler Master
- Max Power: [230V] 1100W [115V] 850W
- Cybenetics Efficiency: [230V] Cybenetics Platinum (91-93%)
- Noise: Cybenetics A++ (<15 dB[A])
- Compliance: ATX v3.1, EPS 2.92
- Operating Temperature (Continuous Full Load): 0 – 40 °C
- Alternative Low Power Mode support: Yes
- Power 12V combined: 1099.2W
- Number of 12V rails: 1
- Power 5V + 3.3v: 120W
- Power 5VSB: 15W
- Cooling: Passive
- Modular Design: Yes (Fully)
- High Power Connectors: 2x EPS (2x cables), 3x PCIe 6+2 pin (3x cables), 1x PCIe 12+4 pin (600W)
- Peripheral Connectors: 8x SATA (2x cables), 4x 4-pin Molex (1x cable)
- ATX Cable Length: 645mm
- EPS Cable Length: 645mm
- 6+2 pin PCIe Cable Length: 550mm
- 12+4 pin PCIe Cable Length: 650mm
- Distance between SATA / 4-pin Molex: 140mm / 120mm
- In-cable capacitors: No
- Dimensions (W x H x D): 150 mm x 85 mm x 180mm
- Weight: 2.65 kg (5.84 lb)
- Warranty: 15-years
- MSRP (including VAT): $400
Power Specifications
| Rail | 3.3V | 5V | 12V | 5VSB | -12V | |
| Max. Power | Amps | 20 | 20 | 91.6 | 3 | 0.3 |
| Watts | 120 | 1099.2 | 15 | 3.6 | ||
| Total Max. Power (W) | 1100 | |||||
I don’t agree with the warranty criticism. It is stated definitively without proof:
“Such a long warranty period will eventually create problems for both the brand and consumers”
Will? How about “might”? It’s actually refreshing to see a company stand behind their product. 15 years is not an unreasonable lifespan for a PSU.
With low loads the efficiency is terrible, much worse than many psu that are around at better prices. Together with other shortcomings I honestly do not understand how it could have taken the editor choice…. incredible. They did not take much more performing power supplies.
why was my comment deleted?
Is it necessary to have a case that allows natural convection, that is, one that has an opening for airflow in the part above the PSU? For example, the be quiet! Dark Base Pro 901 is not compatible with this PSU because it does not have openings on the shroud top?
Yes, this is required else the hot air will be trapped inside the PSU.
Thanks for the review.
Now this in SFX 750-850w and it’s golden.
Even if i had to pay 300€ for a Fanless and no coil whine.
A lot of what makes this sort of thing possible is the somewhat large size, since smaller PSUs need to pack components more tightly which reduces their exposed surface area and therefore cooling potential. This is why SFX PSUs tend to be louder, because the fan needs to spin faster to account for this difference and keep components cool. In other words, less surface area needs more airflow to dissipate heat, while more surface area will need less; this is why passive CPU coolers like the Noctua NH-P1 are so huge, and why rack-mounted servers are able to have such small heatsinks for how power-hungry server hardware can be.
This isn’t to say that a passively cooled SFX unit is impossible, but rather that it would require a lot of development and would have a much lower capacity. After all, safety should be the number one thing when designing (and indeed buying) a new PSU.
honestly I don’t see the point (it’s a showoff most likely), to require as much power you’d need a Threadripper and probably two 4090, there’s no way to cool these down passively
what we need are affordable 400W Passive SFX models instead
We might not need 1100W necessarily, but the smaller 850W model is very welcome and I’ll be buying one of these two when they’re finally available.
I have a RTX 4090 PC with custom watercooling that is completely silent even under heavy load and currently the Seasonic 600W passive PSU. It’s a tad undersized, so I want to upgrade – but for now, the only upgrade path has been the 700W Seasonic. I’m not spending that much money on a 100W upgrade that’ll be useless when GPUs inevitably use the full 600W the new cable can provide.
I do not consider an actively cooled PSU an option because I have yet to see one that’s certain to not add noise to my system at full load.