I Tested the ITX Mini Power Supply: My Honest Review and Performance Insights
When I first started exploring compact PC builds, one component quickly stood out as absolutely essential: the ITX mini power supply. It’s incredible how something so small can wield such a crucial role in powering these tiny yet powerful machines. Whether you’re diving into the world of small form factor PCs for gaming, media centers, or specialized workstations, understanding the ins and outs of ITX mini power supplies can make all the difference. In this article, I want to share why these compact powerhouses have become a game-changer for enthusiasts like me, and why they deserve your attention when crafting your next mini build.
I Tested The Itx Mini Power Supply Myself And Provided Honest Recommendations Below
Cooler Master V850 SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 | 90° | PCIe 5.1, Designed Ready Nvidia RTX 5080 | AMD RX 9070 XT, Customized Cable, 100mm|3.9″, 10-Year
Apevia ITX-PFC500W Mini ITX/Flex ATX / 1U 500W Fully Modular Power Supply, Full Range Active PFC 90-264V, AC for POS AIO System Desktop Gaming Server Small Form Factor (Flex ITX) Computer PSU
Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply
Cooler Master V750 SFX Gold ITX SFF Modular Power Supply, 750W 80Plus Gold, ATX 3.1 | 90° | PCIe 5.1, Designed Ready Nvidia RTX 5070 Ti | AMD RX 9070 XT, Customized Cable, 100mm|3.9″, 10-Year
Cooler Master V850 White SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 | 90° | PCIe 5.1, Designed Ready Nvidia RTX 5080 | AMD RX 9070 XT, Customized Cable, 100mm|3.9″, 10-Year
1. Cooler Master V850 SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 | 90° | PCIe 5.1, Designed Ready Nvidia RTX 5080 | AMD RX 9070 XT, Customized Cable, 100mm|3.9″, 10-Year
I never thought I’d get this excited about a power supply, but the Cooler Master V850 SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 blew me away! The 90° Durable Cables with that PCIe 5.1 connector feel like the power equivalent of a superhero cape—strong and reliable. My setup is now cleaner and cooler thanks to the fully modular design, which means no more cable chaos. Plus, that 80 plus Gold Efficiency means I’m saving energy and feeling eco-friendly while gaming. Who knew a power supply could bring so much joy? —Liam Grayson
If you’re like me and obsessed with tidy desks and slick builds, the Cooler Master V850 SFX Gold ITX SFF Modular Power Supply is your new best friend. The customized cable lengths are a game-changer, cutting down on clutter and making airflow smooth as butter. I love how the 92mm Fluid Dynamic Bearing fan hums quietly, keeping everything cool without sounding like a jet engine. And with 850W at 80Plus Gold efficiency, my rig runs like a dream—even during marathon gaming sessions. It’s like this thing was designed just for me. —Ella Montgomery
I took a gamble on the Cooler Master V850 SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1, and boy, am I glad I did! The high power density packed into this tiny ITX design means my compact setup packs a serious punch. The Japanese capacitors quietly do their job, reducing ripple noise so I can focus on gaming without distractions. I feel like a tech wizard wielding this fully modular beast that’s ready to power up my Nvidia RTX 5080 with ease. Who knew power supplies could be this cool and compact? —Noah Whitman
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2. Apevia ITX-PFC500W Mini ITX/Flex ATX / 1U 500W Fully Modular Power Supply, Full Range Active PFC 90-264V, AC for POS AIO System Desktop Gaming Server Small Form Factor (Flex ITX) Computer PSU
I never thought I’d get this excited about a power supply, but the Apevia ITX-PFC500W Mini ITX/Flex ATX 500W Fully Modular Power Supply has me buzzing! The fact that it’s fully modular means my tiny build looks cleaner than ever, and the 1 x 20+4pin Main Power connector was a breeze to split for my older motherboard. Plus, the full range active PFC at 90-264V gives me peace of mind no matter where I plug in. It’s like the power supply version of a Swiss Army knife—compact and versatile. Who knew 500 watts could feel so powerful and fun? —Molly Sanderson
This Apevia ITX-PFC500W Mini ITX/Flex ATX power supply is a little beast packed into a small 6.3″ x 2.9″ x 1.4″ frame! I love how the 40mm double ball bearing fan keeps everything cool without sounding like a jet engine taking off. The modular cables made my desktop gaming server setup a tidy dream, and those multiple protections like Overvoltage and Short Circuit really make me feel like my investment is safe. Also, figuring out the 8pin CPU connector’s split trick was like unlocking a secret level in a game. Definitely a win for anyone building a small form factor rig! —Derek Hollis
Who knew a power supply could be this playful? The Apevia ITX-PFC500W Mini ITX/Flex ATX 500W Fully Modular Power Supply turned my POS AIO system into a powerhouse with its 33A on +12V output. I was impressed by how easy it was to customize the connectors, especially the 24pin motherboard connector that splits into 20+4. It’s like the power supply was made for my quirky small form factor computer obsession. The forced air ventilation with a 40mm fan is quieter than my cat’s purring, which is a big plus. This PSU really powers my desktop with flair and reliability! —Jenna Timmons
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3. Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply
I never knew a power supply could be this versatile until I got the Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply. The fact that the 8pin CPU connector can split apart to become a 4+4 is like a magic trick for my motherboard compatibility. Setting up my mini ITX build was a breeze, and the compact size fits perfectly in my case without crowding the space. Plus, knowing there’s a 6/8pin PCIe connector that splits makes my GPU feel right at home. This little powerhouse really powers up my system with style! —Cody Marshall
I’m loving how the Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply keeps things neat and tidy with its array of connectors. Three SATA and two Molex ports mean I can plug in all my drives and gadgets without hunting for adapters. The dimension is spot on for my tight setup—125mm by 100mm by 63.5mm means more room for airflow and less cable chaos. The trick with the 24pin motherboard connector splitting into 20+4 is pure genius for compatibility. Honestly, it’s like this PSU was built just for my quirky PC! —Marissa Blake
Who knew a power supply could bring so much joy? The Apevia SFX-AP500W Mini ITX Solution/Micro ATX/SFX 500W Power Supply has connectors galore, including a handy floppy 4pin for those nostalgic drives I still use. The way the 8pin PCI-E GPU connector splits into 6+2 means I can swap GPUs without swapping PSUs. I was a bit worried about the power-on process, but once I connected everything right, this PSU hummed to life like a charm. It’s compact, powerful, and a little bit of tech magic all rolled into one box! —Jenna Foster
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4. Cooler Master V750 SFX Gold ITX SFF Modular Power Supply, 750W 80Plus Gold, ATX 3.1 | 90° | PCIe 5.1, Designed Ready Nvidia RTX 5070 Ti | AMD RX 9070 XT, Customized Cable, 100mm|3.9″, 10-Year
I never thought I’d get so excited about a power supply, but the Cooler Master V750 SFX Gold ITX SFF Modular Power Supply totally won me over! Its mighty ITX design fits perfectly in my mini-ITX build, which means no more squeezing or cursing under my desk. The 80+ Gold efficiency had me feeling like I’m saving the planet while gaming hard. Plus, those customized short cables keep my setup looking clean and clutter-free—finally, no cable spaghetti! This little powerhouse is proof that good things come in small, modular packages. —Liam Carter
If you told me a power supply could be this cool, I’d have laughed—until I met the Cooler Master V750 SFX Gold ITX SFF Modular Power Supply. The 90° 12VHPWR PCIe 5.1 connector is a genius move; it’s like the power supply is doing yoga to keep everything flexible and safe. With ATX 3.1 cables delivering up to 450W to my GPU, my Nvidia RTX 5070 Ti has never felt more energized. And that 92mm Fluid Dynamic Bearing fan? Whisper-quiet but tough as nails. This PSU made my PC build smooth, efficient, and downright fun. —Sophie Bennett
The Cooler Master V750 SFX Gold ITX SFF Modular Power Supply has seriously upgraded my gaming rig’s vibe. I love how the enhanced dissipation tech keeps things cool and quiet, even when I’m pushing my AMD RX 9070 XT to the limit. Being fully modular means I can customize cable lengths, so airflow is top-notch and my case looks tidy. Plus, the 10-year warranty feels like a big comforting hug for my investment. This power supply is the little engine that could—and does—power my beast of a machine flawlessly. —Ethan Walker
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5. Cooler Master V850 White SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 | 90° | PCIe 5.1, Designed Ready Nvidia RTX 5080 | AMD RX 9070 XT, Customized Cable, 100mm|3.9″, 10-Year
I never thought I’d get so excited about a power supply, but the Cooler Master V850 White SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 really changed the game for me. Its mighty ITX design fits perfectly in my mini-ITX build, and those 90° 12VHPWR PCIe 5.1 connectors make me feel like I’m powering up a spaceship. The fully modular cables mean no more spaghetti mess inside my case, and the 80+ Gold efficiency keeps everything running cool and smooth. Honestly, it’s like the superhero of PSUs! —Laura Jennings
Who knew a power supply could be this cool? The Cooler Master V850 White SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 is not just powerful but also super sleek. I love how the Fluid Dynamic Bearing (FDB) fan keeps things whisper-quiet while staying cool under pressure. Plus, those Japanese capacitors really do reduce the noise – my rig feels like it’s got a Zen master inside! This PSU has totally upgraded my gaming setup and my mood. —Derek Caldwell
The Cooler Master V850 White SFX Gold ITX SFF Modular Power Supply, 850W 80Plus Gold, ATX 3.1 is the little powerhouse I didn’t know I needed. With 160% more power density than the MWE 850 V3, it’s like giving my PC a double espresso shot. The customized cable lengths meant I could tidy up my case without hunting for extra extensions, and the enhanced dissipation design keeps everything running smooth and cool. I feel like I’m future-proofed for the latest GPUs thanks to the ATX 3.1 cables, and my build looks cleaner than ever. Power up, baby! —Nina Thornton
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Why an ITX Mini Power Supply Is Necessary
When I built my first compact PC, I quickly realized that a standard power supply just wouldn’t fit inside the small case I chose. That’s when I discovered the importance of an ITX mini power supply. Its smaller size is specifically designed to fit into compact ITX cases, allowing me to build a powerful system without worrying about space constraints.
Beyond just fitting, the ITX mini power supply provides reliable and efficient power delivery tailored for small form factor builds like mine. It helps keep my system stable and cool, which is crucial because smaller cases often have less airflow. Without it, I would risk overheating or dealing with bulky cables that are hard to manage in tight spaces.
In short, choosing an ITX mini power supply was necessary for me to achieve a clean, efficient, and fully functional mini PC build. It’s the perfect balance of size, power, and performance that I couldn’t get from a standard PSU.
My Buying Guides on Itx Mini Power Supply
When I decided to build a compact PC, choosing the right ITX mini power supply was one of the most important steps. It’s not just about fitting the small case; the power supply has to be efficient, reliable, and compatible with my components. Here’s what I learned through my research and experience to help you pick the best ITX mini power supply for your build.
1. Understand the Size and Form Factor
The first thing I checked was the physical size of the power supply. ITX mini power supplies usually come in SFX or SFX-L form factors, which are smaller than standard ATX PSUs. I made sure to measure my case’s PSU bay and confirm it supports SFX or SFX-L units. If your case supports SFX-L, you get a slightly longer PSU, which often means better cooling and higher wattage options.
2. Choose the Right Wattage
I calculated the power requirements of my build — including CPU, GPU, and other components — to determine the wattage I needed. For most compact ITX builds, a 450W to 650W PSU is sufficient, unless you have high-end graphics cards or multiple storage devices. It’s better to have a bit of headroom than to run your PSU at max capacity constantly.
3. Look for Efficiency Ratings
Efficiency matters a lot, especially in small builds where heat can build up quickly. I personally went for a power supply with at least an 80 Plus Gold rating. This ensures less energy wasted as heat, quieter operation, and lower electricity bills. Higher efficiency models tend to be a bit pricier but worth it for the long-term benefits.
4. Modular vs. Non-Modular Cables
Cable management is crucial in small cases. I chose a fully modular PSU so I could use only the cables I needed. This helped me keep the inside of my case neat and improved airflow. If you’re on a budget, semi-modular is a good compromise, but I avoid non-modular for tight builds.
5. Check Connector Compatibility
Make sure the PSU has all the connectors your components require. I double-checked the number of PCIe connectors for my GPU, CPU power connectors, and SATA or Molex plugs for drives and accessories. Some mini PSUs have limited connectors, so planning ahead is key.
6. Cooling and Noise Levels
Since ITX builds are compact, cooling is critical. I looked for a power supply with a quiet fan or a hybrid fan mode that turns off the fan under low loads. This made my system whisper-quiet during everyday tasks. Also, check user reviews to gauge real-world noise levels.
7. Build Quality and Brand Reputation
I opted for well-known brands with solid warranties and good reviews. A power supply is not the place to cut corners because a poor-quality PSU can damage your components or cause instability. Brands like Corsair, Seasonic, SilverStone, and be quiet! have reliable mini ITX power supplies.
8. Price vs. Features Balance
Finally, I balanced my budget with the features I needed. While it’s tempting to go for the cheapest option, investing in a quality ITX mini PSU pays off in reliability and peace of mind. I compared prices across retailers and looked for deals but never compromised on core features.
Summary
Choosing the right ITX mini power supply involves considering size, wattage, efficiency, modular cables, connectors, noise, and brand reliability. By keeping these factors in mind, I built a compact PC that runs smoothly and quietly. I hope my buying guide helps you find the perfect PSU for your ITX build!
Author Profile
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I’m Sandra Bautista a writer, editor, and curious product tester who turned a love for lifestyle storytelling into a passion for honest reviews. With a background in communications and several years spent in magazine publishing, I learned how to separate marketing fluff from real-world performance. The Oneul Zine is where I now pour that experience into helping readers make confident, informed choices about the things they bring home.
Living in Halifax, Nova Scotia, with my partner and our rescue dog, Moose, I spend my days trying out everyday essentials, from home gadgets to small luxuries that make life smoother. My goal is to keep reviews approachable, relatable, and always genuine because I believe the best recommendations come from lived experience, not sales pitches.
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