If you’ve ever built a small-form-factor (SFF) PC with an ITX motherboard (like me, a supplier that’s been deep in this niche for 6+ years), you know the allure: a compact rig that fits on a desk, in a backpack, or even a travel bag. But let’s cut the crap—those tiny boards come with way more tradeoffs than your standard ATX or mATX. I’ve seen hundreds of customers come to us frustrated because they bought an entry-level ITX board expecting “just works” and ended up with weird issues they didn’t see coming. Today, I’m breaking down the most common, real-world problems we deal with daily, no AI-generated fluff, just the stuff we hear from builders every single week. ITX Motherboard
First off, the big one: power delivery (VRMs) that can’t keep up with high-end CPUs. If you’re building an ITX rig for gaming or content creation, you’re probably tempted to pair it with a 12-core or 13-core Intel K-series CPU or a top-tier AMD Ryzen X chip. But here’s the thing: ITX boards only have so much space. ATX boards can fit 8, 10, or even 12 power phases for the CPU, but most consumer ITX boards max out at 4 or 6. Those tiny VRMs run hot, and they get overwhelmed when you crank up the CPU power limit for overclocking. We had a customer last month who built a $2,500 ITX rig with a Ryzen 9 7900X and a $100 no-name ITX board—his PC would crash mid-game or during renders, and he thought it was his CPU. Turns out the VRMs on that tiny board were throttling the CPU so hard it was dropping cores under load. We had to swap it for our mid-range ITX board with 8 digital VRM phases, and his problems disappeared overnight. Pro tip: don’t buy an ITX board that lists “8+2 VRM” if it’s only for a 12-core chip—more phases don’t always mean better, but the quality of the VRMs (like whether they’re digital or analog) and their cooling matter way more here.
Next up: limited connectivity, the ultimate ITX gotcha. ITX boards are so small that manufacturers have to cut corners on ports to save space. Let’s say you want to plug in a 4K 144Hz monitor, a webcam, a USB mic, a mechanical keyboard, and a gaming controller—good luck. Most ITX boards only have 2 or 3 USB-A ports, maybe a single HDMI or DisplayPort (if you’re using integrated graphics, that’s fine, but if you have a dedicated GPU, those video ports don’t work). We had a streamer come to us last week who tried to use an ITX board for his setup, and he had to daisy-chain his monitors with a USB hub, which added input lag to his gameplay. Also, storage? ITX boards almost never have 3 or 4 M.2 slots like mATX boards—most have 1 or 2, and one of those is often shared with a SATA port, so you can’t use both at the same time. If you want to add a second M.2 drive, you might have to give up a SATA port for your HDD or optical drive, which is a bummer for anyone storing large game files or media. And don’t even get me started on Wi-Fi—some cheap ITX boards use slow 2.4GHz-only Wi-Fi, not 5GHz or 6, so you’re stuck with lag if your router’s across the room.
Then there’s the overheating nightmare, especially for M.2 drives and VRMs. Because ITX boards are crammed into such a small space, airflow in an SFF case is already tight, and those tiny components don’t get enough cooling. We see this all the time with M.2 drives: if you don’t add a heatsink (and some cheap ITX boards don’t even have a mounting point for one), your NVMe drive will hit 80C+ during a 4K render or a long game session, and that will cause random crashes or slowdowns. I remember a builder who bought a super cheap ITX board that didn’t come with an M.2 heatsink, so he just stuck his drive in bare—his read speeds dropped by 20% after a month, and he thought his drive was dying, only to realize it was overheating. VRMs get just as hot too—without proper heatsinking, those tiny power phases can hit 100C under load, which shortens their lifespan and causes instability. One easy fix is to get an ITX board with pre-installed heatsinks for both the VRMs and M.2 slots, but a lot of budget boards skip that to cut costs.
Upgrading and expanding? It’s a total pain in the ass. Unlike ATX boards, which have plenty of room between slots and components, ITX boards are so cramped that even small upgrades can be a hassle. Let’s say you want to upgrade your RAM from 16GB to 32GB: most ITX boards only have 2 RAM slots, which is fine, but if you’re using tall heatspreaders on your RAM, they might collide with the M.2 slot on the board or with the GPU in your case. We had a customer last month who bought a set of 4000MHz CL16 RAM with huge heatspreaders, and they couldn’t install them because the M.2 heatsink on his ITX board was in the way—he had to take the heatsink off, which made his M.2 overheat. Also, GPU clearance is a huge thing for ITX builds: you can’t just stick any long GPU in an SFF case, and the ITX board’s PCIe slot placement can make it even tighter. If you have a full-length GPU, make sure your ITX board’s PCIe x16 slot is not too close to the RAM slots, otherwise the GPU will block the RAM slots when you’re upgrading them. It’s not a dealbreaker, but it’s a huge headache that builders don’t always anticipate when they’re ordering parts online.
Oh, and BIOS bugs that are way more common on entry-level ITX boards. Because manufacturers of cheap ITX boards don’t test their BIOS as thoroughly as they do for bigger boards, you’ll run into weird issues that don’t show up on mATX or ATX: like the board not recognizing your CPU after an upgrade, or the USB ports stopping working randomly, or overclocking settings not saving. We had a customer who updated his ITX board’s BIOS and ended up bricking it—turns out the firmware was buggy, and the manufacturer pulled it a week later, but by then he had to pay to RMA the board. The good news is that our mid-range and premium ITX boards get way more testing, and we provide regular BIOS updates to fix bugs, but if you buy a no-name board from Amazon for $50, you’re basically rolling the dice.
Wait, can we talk about the power supply issue too? ITX builds almost always use SFX or SFX-L power supplies, which are smaller than standard ATX PSUs, but they’re less powerful and often noisier at full load. And a lot of entry-level ITX boards only come with a 24-pin power connector, no extra PCIe power for the PSU? No, wait, no—most ITX boards work with SFX PSUs, but the problem is that cheap SFX PSUs are less efficient, so your whole system might be louder and use more power than an equivalent mATX build. Also, if you’re using a high-end GPU that needs two 8-pin PCIe connectors, some ITX builds can’t fit a PSU that has both connectors, so you might have to use an adapter, which can cause power issues.
Let’s be real—ITX motherboards aren’t for everyone. They’re perfect for people who want a portable, tiny PC for browsing, light gaming, or work, but if you need a high-performance rig for content creation or AAA gaming, you have to pick the right board, or you’ll run into these issues. As an ITX board supplier, we see these problems every single day, and that’s why we design our boards to mitigate them: we use high-quality digital VRMs with proper heatsinks, we add two M.2 slots with pre-installed heatsinks, we include enough USB ports for most builds, and we test every BIOS update before releasing it to customers.
If you’re building an ITX PC and you’ve run into any of these issues, or if you’re looking for a reliable ITX board that doesn’t come with all the headache, hit us up to talk through your build. We can help you pick the right board for your CPU, case, and budget, no bullshit, no pushy sales stuff.
Mini PC References
Tom’s Hardware. (2023). "The Best ITX Motherboards for 2024". Tom’s Guide.
PC Gamer. (2024). "Common SFF PC Building Mistakes and How to Fix Them". PC Gamer.
AnandTech. (2022). "VRM Selection Guide for SFF Gaming PCs". AnandTech.
Micro Center. (2023). "ITX Build Compatibility: RAM, GPU, and Power Supply Tips". Micro Center Knowledge Base.
Shenzhen HJS Technology Group
Shenzhen HJS Technology Group is one of the most experienced ITX motherboard manufacturers and suppliers in China, featured by quality products and good service. Please rest assured to buy CE approved ITX motherboard made in China here from our factory. For price consultation, contact us.
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