HP Pro Mini 400 G9 Jack black 2024

The HP Pro Mini 400 G9 is a pint-sized Windows desktop with a 14-core i5, 16GB DDR5, and a wealth of ports. It's whisper-quiet and built like a tank, but the integrated graphics are underwhelming and the 256GB SSD is stingy. At $745 it's a decent business mini; at the high end of its price range it's shockingly overpriced. Unless you need Windows in a tiny, port-heavy box, the Mac mini M4 offers far more oomph for less cash.

The HP Pro Mini 400 G9 sits at the intersection of two trends that have reshaped office computing: the move toward compact, energy-efficient mini PCs and the need for hardware-level security that doesn't require a dedicated IT army. HP stuffed a full-fledged 14-core Intel Core i5-14500T, 16GB of DDR5 memory, and Windows 11 Pro into a chassis you can literally hide behind a monitor. It's aimed squarely at businesses, home offices, and anyone who wants a quiet, unobtrusive desktop that handles spreadsheets, Zoom calls, and a dozen browser tabs without complaint.

What catches your eye first is the port situation. You get six USB-A ports (a mix of fast and legacy), a USB-C, DisplayPort 1.4 out, an HDMI 2.1 port, and gigabit Ethernet. That's more connectivity than many full-size towers, and it's a clear signal that HP understands the realities of desk life: dongles stink, and separate hubs add clutter. Add in Wi-Fi 6E and you've got a machine ready for modern wireless networks too.

But there are a couple of asterisks that keep this from being a no-brainer recommendation. The integrated Intel graphics are fine for 2D work but utterly outclassed by even a $40 add-in card from five years ago. And the 256GB NVMe SSD, while speedy, lands in the bottom fifth of all desktop storage we track. That's a crunchy amount of space once Windows 11 Pro and a few Office 365 apps settle in. Still, if you're deploying dozens of these into a call center or a clinic, the combination of size, quiet operation, and HP's Wolf Security make a strong case.

We don't have synthetic benchmark numbers for this exact config yet, but our mini PC database paints a clear picture. The Core i5-14500T, a 35W chip with six performance cores and eight efficiency cores, falls right around the middle of the desktop CPU pack. For everyday office chores it feels snappy, Outlook, Teams, and a pile of Chrome tabs don't phase it. The 16GB of DDR5 is about average, giving you enough headroom for multitasking but not much more if you're a power user who likes to keep 30 tabs and a bloated CRM running all day.

The real drag is the GPU. Intel's integrated UHD Graphics 770 sits in the lower third of all desktops we test, and our gaming suitability score for this machine is a sad 11.6 out of 100. Don't expect to play anything newer than Stardew Valley or maybe CS:GO at low settings. It's fine for driving a couple of 4K displays for productivity, but if your workflow touches even light photo editing or CAD, the GPU will quickly become the bottleneck. Storage capacity is equally underwhelming; the 256GB SSD is among the stingiest we've seen in this category, meaning you'll be reaching for an external drive or cloud sync sooner rather than later. The drive itself is NVMe, so boot times are brisk, but capacity is the achilles heel.

HP's official pricing is all over the map, and that's being kind. We've seen retailers list this exact configuration from $745 all the way up to $1,771. If you can snag one around the $745 mark, you're getting a well-built, secure mini PC that undercuts many of HP's own smaller business desktops. But if you're staring down a $1,300 or higher price tag, something's gone wrong. At that point, you could buy an Apple Mac mini M4 with a faster CPU, vastly superior GPU, and the same 256GB storage for $599, or a 512GB version for $799.

The value proposition hinges entirely on your need for Windows and legacy ports. For an IT department managing a fleet of these with existing images and group policies, the HP's manageability and security suite might justify a premium. For a freelancer or home office user who just needs a tiny PC, the Mac mini offers a lot more horsepower per dollar, even if you have to live with macOS and a dongle or two.

There's no escaping the elephant in the room: the Apple Mac mini M4. It's even smaller, starts at $599, and its M4 chip absolutely demolishes the Intel i5-14500T in both CPU and GPU tasks. The HP fights back with Windows 11 Pro, a glut of USB-A ports, an HDMI 2.1 and DisplayPort 1.4, and HP Wolf Security. If you're locked into a Windows ecosystem, need to plug in a half-dozen legacy peripherals without a USB-C hub, or require manageability tools like HP Image Assistant, the Pro Mini 400 G9 is the obviously better pick. But for raw performance per cubic inch, the Mac mini wins without breaking a sweat.

Then there are the full-sized gaming towers that show up in this price bracket. The Lenovo Legion Tower 5i, ASUS ROG G700, and MSI Aegis RS2 all offer dedicated GPUs, faster processors, and easy upgradability for roughly the same money as a high-priced Pro Mini. They're hulking and they'll light up your desk like a rave, but they'll also play modern games at 1440p and chew through video renders. If you don't need the ultra-compact form factor and you do anything graphically intensive, one of these towers is a far smarter buy. The HP simply can't compete in GPU-bound workloads.

If you plan on gaming, video editing, 3D modeling, or any task that leans on a GPU, skip this machine entirely. The integrated graphics simply can't keep up, and a $750–$1,000 gaming tower will deliver a dramatically better experience. Likewise, if you need more than 256GB of local storage right out of the box without cracking open the case, look elsewhere—this config fills up fast with Windows and a handful of apps. Creative pros who want a compact Windows powerhouse should consider a small-form-factor system with a dedicated GPU or even a mini PC from Minisforum or Intel NUC that offers a discrete laptop-grade GPU. And if you're comfortable with macOS, the Mac mini M4 blows the HP out of the water on performance and price, unless you absolutely need those six USB-A ports.

For the right use case, the HP Pro Mini 400 G9 is a quiet, no-fuss desktop that disappears into a workspace. We'd happily recommend it for business deployments where size, security, and reliable Ethernet/USB-A connectivity are top priorities. Think reception desks, point-of-sale systems, medical offices, or remote workstations that need to sit behind a monitor and never be heard. It handles everyday productivity without breaking a sweat, and HP's support and security tools give IT admins peace of mind.

But for anyone whose work or play goes beyond Outlook and Excel, there are simply too many trade-offs. The integrated graphics are a dealbreaker for creative work or gaming, and the small SSD guarantees you'll hit a capacity wall quickly. Upgrading the storage is possible, but that adds cost and time. If you have the flexibility, the Apple Mac mini M4 is the better compact PC, and if you can tolerate a larger chassis, a gaming desktop like the Lenovo Legion Tower 5i delivers orders of magnitude more GPU power for the same dollars. The Pro Mini 400 G9 is a specialist, and it's worth it only if you fit its narrow niche.