None of the five listed power supplies is specified as fully fanless, so none can be confirmed as a true fanless PC power supply. The closest match is the Cooler Master MWE Gold 850 V2, which is described as semi-fanless. The MSI and 1000W models may suit higher-power builds, while Thermaltake’s 500W and 600W units are conventional fan-cooled options. Use this guide to compare the listed choices and check the manufacturer’s specifications for the exact fan behavior before buying.
| Product | Best suited for | Fan information provided |
|---|---|---|
| Cooler Master MWE Gold 850 V2 | Quiet-focused systems needing 850W | Semi-fanless, low-noise |
| MSI MAG A750GL PCIE5 | 750W ATX 3.1 builds | Fan mode not specified |
| 1000W Fully Modular PSU | High-wattage builds | RGB low-noise smart fan |
| Thermaltake Smart 600W | Systems needing 600W | Fan mode not specified |
| Thermaltake Smart 500W | Basic systems needing 500W | 120mm cooling fan |
Cooler Master MWE Gold 850 V2
Best for: Buyers who want a higher-wattage unit with a stated semi-fanless, low-noise design. This is the closest listed option to a fanless PSU, but semi-fanless does not mean the fan never runs.
The unit is fully modular and rated at 850W, with 80 PLUS Gold efficiency. Its listed features include two EPS connectors and operation support up to 50°C. These details make it a candidate for builds that need more capacity and cable flexibility, while its semi-fanless description makes it more relevant to quiet-PC shoppers than the other options.
Limitation: The supplied product information does not specify the fan’s activation temperature or load threshold. Check those details if you need predictable fan-stop behavior.
MSI MAG A750GL PCIE5
Best for: Builders seeking a 750W fully modular supply with current ATX 3.1 and PCIe 5.1 support. The listed product name also specifies a native dual-color 12V-2×6 cable.
Its 80 PLUS Gold certification and compact design may suit a modern gaming build where modular cabling and the stated connector standard matter. The product listing includes a 10-year limited warranty. It is selected as a useful middle-ground capacity option, not as a fanless model.
Limitation: The supplied features do not describe a fan-stop or semi-fanless mode. Do not assume silent operation from the product name or efficiency rating alone.
1000W Fully Modular ATX 3.1 PSU
Best for: Buyers whose system calls for a 1000W supply and who want ATX 3.1 and PCIe 5.1 support. The listing specifies a native 12V-2×6 cable, fully modular cables, and a low-noise smart fan.
The product information also lists 80 PLUS Gold certification, 105°C-rated capacitors, and dimensions of 150 × 150 × 86 mm. Its modular design can help reduce unused cables inside a compatible case. It is included for high-wattage comparisons, but it is not fanless: the listing explicitly identifies a fan.
Limitation: “Low-noise” does not establish that the fan stops at idle. Verify fan-control details and case fit before choosing it.
Thermaltake Smart 600W
Best for: A system that needs 600W continuous output and uses the listed PCIe 6+2-pin connectors. The specifications cite Intel ATX 12V 2.31 and EPS 12V 2.92 compliance, 80 PLUS certification, and active power factor correction.
This is a conventional capacity-focused choice rather than a quiet-first recommendation. It is listed with 80% efficiency under typical load and an MTBF of 100,000 hours. Choose it if its output and connector details match your build and fanlessness is not required.
Limitation: Fan behavior is not described in the provided features, and the listing does not identify it as semi-fanless.
Thermaltake Smart 500W
Best for: Buyers with a system that needs 500W continuous output and can use two PCIe 6+2-pin connectors. The specifications include 80 PLUS certification, active PFC, and compatibility with the stated Intel ATX 12V 2.31 and EPS 12V 2.92 standards.
The product listing describes a 120mm ultra-quiet cooling fan and 80% efficiency under typical load. That makes it a fan-cooled budget-category alternative in this comparison, not a fanless solution. Choose it only when the wattage and connectors suit the planned components.
Limitation: It has a specified cooling fan, so it is not an appropriate choice when the goal is zero PSU fan noise.
Buying Guide: How to Choose a Quiet PC Power Supply
Do you need fully fanless or semi-fanless operation?
A fully fanless PSU has no cooling fan. A semi-fanless PSU includes a fan that may remain off under certain conditions and run when cooling is needed. Confirm the exact operating behavior in the manufacturer’s documentation; terms such as “quiet” and “low-noise” do not guarantee fan-stop operation. Among these five products, only the Cooler Master is explicitly described as semi-fanless.
How much wattage should you select?
Choose a PSU based on the power needs of the complete system, including the processor, graphics card, drives, and other components. The listed choices range from 500W to 1000W. Higher wattage alone does not make a supply quieter or more suitable; match capacity to the system and check the required connectors.
Which specifications matter for a modern build?
Compare connector requirements, standards, modularity, and efficiency. The MSI and 1000W listings specify ATX 3.1 and PCIe 5.1 support, while the 1000W listing also names a native 12V-2×6 cable. Fully modular models let builders detach unused PSU cables. Efficiency certification describes energy conversion performance, not whether a fan runs.
What should quiet-PC buyers verify?
Look for a clearly stated fan-stop mode, its activation conditions, and noise information from the manufacturer. Also confirm dimensions and case clearance, especially for compact builds. If zero fan noise is essential, select a product explicitly documented as fanless rather than inferring fan behavior from an efficiency label.
Frequently Asked Questions
Is any listed power supply fully fanless?
No. The Cooler Master is described as semi-fanless, and the 1000W model explicitly includes a smart fan. The other listings do not establish fully fanless operation.
Which listed PSU is closest to fanless?
The Cooler Master MWE Gold 850 V2 is the closest match because its listed features describe semi-fanless, low-noise operation. Verify when its fan turns on before purchasing.
Does 80 PLUS Gold mean a PSU is quiet?
No. 80 PLUS Gold describes efficiency certification. It does not, by itself, specify fan noise or fan-stop behavior.
Can a semi-fanless PSU become audible?
Yes. A semi-fanless unit has a fan that may operate when cooling is required. The provided Cooler Master details do not state the exact fan activation conditions.
Should I choose a higher-wattage PSU for lower noise?
Not automatically. Choose wattage to suit the system’s power requirements, then compare documented fan controls and noise information separately.