SFF 101: Picking the Perfect Power Supply for Tiny PCs – SFX vs ATX
Building a Small Form Factor (SFF) PC? One key piece you can't overlook is the power supply unit (PSU). The right PSU ensures setup hums along while fitting snugly inside your pint-sized build. In this realm, SFX and ATX are the reigning champions. So, which one is your knight in shining armor?
In this guide, we’ll pit SFX against ATX power supplies, highlight their highs and lows, and help you figure out which option wins the day for your compact computer.
So, What's an SFX Power Supply?
SFX (Small Form Factor Extended) power supplies aren't just tiny; they're tailor-made for space-saving cases, like those cute Mini ITX ones. They’re not as big or beefy as ATX units, which makes them the pick of the litter for cases where elbow room is scarce.
SFX Power Supply Perks:
Size: At 100mm x 125mm x 63.5mm, they're pocket-sized next to ATX giants.
Compatibility: Designed with small cases in mind where a regular ATX PSU just won't fit.
Power Output: They pack a punch from 300W to 850W, even powering gaming monsters with Nvidia RTX cards or Intel Core i9s.
SFX PSU Pros:
Compactness: Great for tight spots in Mini ITX or cozy cases where every inch matters.
Superb Airflow: Smaller size means room for other bits and offers better airflow, crucial for keeping cool in tiny builds.
Adaptability: Some come with a handy bracket to slot them into standard ATX cases if needed.
SFX PSU Cons:
Cost: They can be pricier than ATX friends, especially if you need more juice.
Limited Choices: There’s growing variety, but ATX options are still more plentiful.
What’s an ATX Power Supply?
ATX (Advanced Technology Extended) power supplies are the go-to for full-sized builds. Though larger than their SFX counterparts, some SFF cases can still house ATX power supplies if there’s room to spare or if the case is on the bigger side, like Micro-ATX or some Mini ITX ones.
ATX Power Supply Highlights:
Size: A hefty 150mm x 86mm x 140mm, easily dwarfing SFX models.
Power Output: From 450W up to a whopping 1600W, perfect for powerhouse machines or multi-GPU configs.
Standard Fit: The pick for most ATX and Micro-ATX cases.
ATX PSU Pros:
More Choices: A vast array of wattages, prices, and brands to choose from.
Higher Wattages: Ideal for demanding setups that need more juice for dual GPUs or powerful CPUs.
Affordable Power: Generally, ATX PSUs give more bang for your buck at higher wattages.
ATX PSU Cons:
Size Hassles: ATX PSUs hog space, which can crowd small builds, hampering airflow and leaving less room for other components.
Less Nimble: In cramped builds, ATX units can cramp your cable management and cooling style, potentially leading to hot, cluttered messes.
SFX vs ATX: Who Should Take the Crown in Your SFF Build?
Picking an SFX Power Supply When:
You're assembling itty-bitty Mini ITX or ultra-compact cases. The tiny size of SFX PSUs makes them a perfect fit.
You're focused on airflow, as their compact form allows more breathing room for your components.
You're gunning for aesthetics, aiming for a sleek, neat build free from chaos.
Opting for an ATX Power Supply When:
You need big energy, thanks to a power-hungry beast featuring a high-end RTX 4090 or top-tier processors.
Your case can handle it. Some Micro-ATX or spacious Mini ITX cases welcome an ATX PSU with open arms, offering savings by sticking with an ATX model.
Budget is on your mind, as ATX power supplies are easier on the wallet, especially at higher wattages.
The Ultimate Choice: SFX or ATX?
To decide between SFX and ATX for your compact PC, keep an eye on some key points:
Case Size and Fit: If your case allows for an SFX model, it usually wins for compactness and airflow. However, if there's room for ATX and size isn't pinching, enjoy the power and cost benefits of an ATX PSU.
Power Needs: Consider what your gadgets crave. High-power setups with gaming cards might call for an ATX. For simpler rigs, SFX will do just fine.
Budget Considerations: If your wallet's feeling light, ATX PSUs might be a friendlier pick compared to the pricier SFX models.
Dive into Power Supply Choices with SFF Setups
At SFF Setups, your journey through small form factor mystery land is covered! Whether it’s finding the best SFX and ATX power supplies, the ideal cases, or cooling helpers, we're here for you. Craft your minimalist gamer’s paradise or compact workstation with our detailed guides, reviews, and irresistible build inspirations.
Peek at our latest power supply reviews and dive into our top picks for crafting your dream SFF PC setup!
