Hyte Unveils New Gaming PC Components: Enhanced Cooling, RGB Lighting, and Flexible Fan Settings for Motherboard Users
Deciding on Perfect PC Ventilation: The Battle Between PWM and DC Fans for Optimal Performance
If you’ve built a PC in the last few decades, you’ve almost certainly come across a 3-pin (or even 2-pin) DC fan or a 4-pin PWM fan (if not both) when setting up the cooling inside your case. And since you can connect a 3-pin fan to a 4-pin header or a 4-pin fan to a 3-pin header and the fans will spin, that may lead you to wonder what the difference is between the two and which is better.
The short answer is that DC fans typically spin at a static speed, unless they’re connected to something like a fan controller with hardware knobs. With some motherboards, you can also control DC fan speeds via the BIOS, but PWM fans can be adjusted in much finer detail. This can either be done manually, or dynamically based on things like temperature or CPU load, so that the fans can be quieter when less cooling is needed, and spin faster when things get toasty inside your chassis.
These days, three-pin DC case fans are far less common than PWM, for reasons that will become clear as we dig deeper into the differences between the two below.
DC (direct current) fans
(Image credit: Tom’s Hardware)
Direct current, or DC case fans (also often called three-pin fans for their three-pin fan connectors) are as simple as case fans get these days. DC fans are controlled by their current, which means, by default, they run at a fixed speed, unless you have them connected to something that can adjust the voltage, like an old-school front-panel fan controller.
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Many motherboards do technically allow you to control DC fans via the header if you switch to DC fan control mode. But this depends on your specific board, the control won’t be as granular as PWM control and, crucially, DC fans won’t be able to spin as slowly as PWM fans.
The most basic DC fans have just two wires, for power and ground. But DC fans meant for PC use these days also usually have a third “sense” pin that lets the PC know the fan’s current speed.
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PWM (pulse width modulation) fans
PWM fans , also known as 4-pin fans, use pulse width modulation to vary fan speed, accomplished via an extra “control” pin. In short, PWM fans can be ramped up and down via the motherboard or other connected device, by switching the power off and on quickly (modulating) at frequencies far too high for you to notice.
(Image credit: Tom’s Hardware)
When it comes to fans (as opposed to AIO cooler pumps or RGB strips, which also often use PWM), the speed is typically tied to temperature sensors inside the case or components, or CPU or GPU load, so your system only needs to be noisy when things get very warm. In other words, with PWM fans, you don’t need to dial the speed up or down manually, and you get much more granular speed control (and generally fans that can spin more slowly) than with DC fans.
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Which fans will you Find in Modern PC Cases?
Overwhelmingly, thebest PC cases to come out in recent years, even budget cases like thePhanteks XT Pro Ultra , will ship with PWM case fans – if any case fans are included at all. These days, you’re only likely to encounter DC fans in sub-$50 ultra-budget cases, and even then you’ll likely only find a DC fan used as exhaust. EvenCooler Master ’s Masterbox Q300L has a singular PWM fan, and it sells for around $40.
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## DC Fans can cost less, but that’s increasingly not trueAs you might have guessed at this point (or if you’ve shopped for case fans previously), the primary benefit of opting for DC fans over PWM models is cost – or at least it used to be. DC fans, especially if you’re willing to take a chance on no-name brands, can often be found only for very little money.
When we wrote this, you could finda three-pack of Darkrock 120mm DC fans on Amazon for $9 . But if you care at all about the benefits of PWM models, athree-pack of Thermalright TL-C12C PWM fans is less than $12 , or about a dollar extra per spinner. Clearly the price overhead for PWM has come down, and perhaps DC fan pricing has crept up due to diminished demand, at least in the PC cooling space. If you order individual fans, you can find PWM or DC fans starting at around the same price, with our search results starting at between $6 and $7.
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So why wouldn’t you opt for PWM fans?
With finer-grained control, typically quieter low-speed operation (because they can spin more slowly), and far more models available, almost anyone building or upgrading a modern PC should opt for PWM fans at this point. You might be able to save a couple of bucks (literally) by opting for DC spinners, but you’ll likely also be getting fans that are worse in other ways as well, since name brand companies primarily sell PWM fans, and have for a long time.
But DC fans do still have their place in the market – it’s just not the mainstream PC market. DC fans these days are mostly relegated to legacy PC hardware and specific repairs to old electronics. But if all our news coverage of legacy PCs and electronics is any indication, those old gizmos still mean something to many of you (and some of us). Just be sure that if you’re buying DC fans, you’ve at least evaluated competing PWM fans and are opting for DC for a very good reason.
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- Title: Hyte Unveils New Gaming PC Components: Enhanced Cooling, RGB Lighting, and Flexible Fan Settings for Motherboard Users
- Author: George
- Created at : 2024-08-15 06:27:01
- Updated at : 2024-08-16 06:27:01
- Link: https://hardware-tips.techidaily.com/hyte-unveils-new-gaming-pc-components-enhanced-cooling-rgb-lighting-and-flexible-fan-settings-for-motherboard-users/
- License: This work is licensed under CC BY-NC-SA 4.0.