UM870 Slim Mini PC Barebone AMD Ryzen 7 8745H(8C/16T), Mini Desktop Computer Without RAM/SSD/OS, AMD Radeon 780M Graphics, USB4/HDMI2.1/DP1.4 Output, 2.5G LAN, 4xUSB Ports, WiFi 6E, BT5.3

Being an avid pc gamer who has to spend a few nights a month out of town for work, I wanted something powerful with a small footprint. I thought about a Steam Deck or a Rog Ally X, but came to the conclusion that id basically only be using it Docked mode, so the built in screen and controller would not be used, therefore not worth the added cost. Started researching and landed on this. The processor is great, the size is mind-blowing, and the 780m packs a punch for graphics. Gaming wise, here's the brutal truth- Steam AAA games with FSR still look pretty good, I spend most my time gaming on an RTX 4080, so definitely had to temper my ecpectations- knowing that, very happy with the performance. Being able to play newer games on the road is wild. Especially for something that fits on the palm of your hand and weighs about as much as an Xbox controller. Putting together was a snap, I actually did the entire thing in a hotel room with a screwdriver on my keychain. disregard the reviews about the feet needing to be pryed off- as of July 2025, the units no longer have the feet preattached to the barebone kit. Heres where this really shines, emulation gaming. Expect 1440p 60hz on PS3, Wii, Xbox 360 Expect 1080p 60hz on Switch Expect 4k 60hz on everything below (would be an infinite amount of FPS, but there are limits non related to this actual equipment). Bought a cheap case and have my whole setup to take literally anywhere now. 10/10, would buy again and again

First off, I did upgrade this thing to the max, 94Gb of DDR5 5600MHz RAM, and dual M.2 NVME drives. You have to go into the BIOS as set a dedicated portion of the RAM for use as video RAM (can be up to 16GB) and since it does not have an hard drive and OS then you will need the driver package from the MinisForum website. The model UM870 slim uses the same drivers as another model (like UM640 or something) but they work fine. This runs games faster and in better quality than my PS5 does. I definitely recommend it. And it was about the same price to buy this bare bones system and then get twice the RAM and hard drive size on my own than even the largest amount offered on a pre-built bundle. Not including an OS, but I already have a Windows 11 Pro key, so I didn't have to include that in the cost of building it on my own. The 4 stars out of 5 is just because of the way the bottom of the system is. First off, it is a bare bones system, meaning you absolutely have to open it to put in RAM and a M.2 drive (or 2) yet in order to open it up you have to pull off the 4 rubber feet that are held on by sticky tape, and it only comes with 2 replacement feet (by the way, you also have to remove the feet if you plan on using the vesa mounting bracket or you need to supply your own longer screws). Then you need to remove 4 screws that use thread locker on them, then you can pop off the bottom cover, and be careful not to pull it off too fast, because the cooling fan is screwed to the bottom, and attached to the motherboard with a 4 pin connector. Also, the cooling fan mount is just a thin sheet of metal and comes with 2 thermal pads on it so it is supposed to act like a heat sync for the 2 NVME drive slots, but does not allow you to put any 3rd party heat sync on the drives because there is no room for the cover to go back on. However I was able to modify the fan mount by basically cutting 90% of it off and moving the fan over so it is only held on by 2 of the 3 tiny screws that hold the fan to the bracket, and only 2 of the 4 screws that normally hold the bracket on, and having to cut a small notch out of the inside of the bottom cover. Basically they could have made it fit, and allowed for better heat syncs on the drives, but decided that one flat piece of steel would be better than aluminum finned heat syncs. Would have been 5 stars if the had just left the feet off and included them as an optional add-on in the box. Had not used that blue thread locker on 4 screws that 100% need to be removed by the customer, and had just moved the bottom cooling fan over far enough to allow for better 3rd party heat sync options to be used (without needing modifications). Also, I don't need the dual Ethernet ports, and would have much rather it had an extra USB-C port. But I just used one of those USB-C hubs to add a bunch of extra ports to it.

The only bad things I can say about it is the process to open it involves removing the feet which are stuck on and the stickiness will wear overtime if it's open to often. You then need to use a tool to undo the clips to remove the cover. Other mini PCs I've used just have exposed screws on the bottom and the panel is then free after they are removed. The fan noticeable at idle, and through under load it doesn't get much worse. The Good. Amazing performance at an extremely low power draw. Dual m.2 2280 NVME slots and pads are included so you can cool them. Note that you need bare NVME drives, ones with a case won't work as you won't be able to close the lid. Triple monitor output, I did run into issues where none of the Display Port to HDMI adapters or cables I had worked. However, a DP cable to a DP port on the monitor did work. I ended up getting a new DP1.4 to HDMI adapter which is labelled as "8K" and that adapter is recognized and works. It won't break any records versus a PC with a discrete GPU for gaming. But the specs match up to the Z1 Extreme and Z2 found in current handheld gaming PCs. But this has higher TDP, so it'll can hit more performance. You just don't be running them at 4K, but if the Steam Deck can run it, this will as well at better settings.

I bought this mini pc to use with Batocera. The wifi/bt card doesn't work. I had to purchase an Intel ax210 card.

nice product fast shipping

It worked really well for about 3 months, then it started to act up. Initially the ethernet device just vanished. I had to reset the BIOS and reinstall the driver then it reappeared. Then it started crashing on waking from sleep. The diagnostics always came back fine but there was no way to avoid crashing after sleep. I switched to hibernate. Then finally Windows 11 began giving errors. I tried to reinstall Win 11 and that's when error after error came during the installation. Basically, I could not reinstall Windows. After 2 days of attempting to reinstall Windows, I gave up. It's a low quality product and I would not buy. It looked really practical at the beginning but after 4 months, it is evidently an unreliable product.