Pros: UPDATE 10-18-2016: Has been running Folding-at-Home from 8a.m. 'til midnight every day for several months now and i'm happy to report no problems. The Folding setting is on "Full" so all 4 cores are running at 100%. According to Cpuid's HW (hardware monitor) program, the cpu core temps. are between 50 and 54 deg. C. which is very acceptable, especially considering the cpu cooler is simply a heatsink with no fan! ORIGINAL REVIEW: ASRock website clearly states this board works with: "OS - Microsoft® Windows® 8.1 32-bit / 8.1 64-bit / 8 32-bit / 8 64-bit / 7 32-bit / 7 64-bit" According to other reviewers here it also works well with Linux and FreeNAS (for a home server). Incredible value in a low-power, passively cooled quad-core system.

Cons: None at the price!

Overall Review: i don't understand why people give lower ratings because of things they failed to check before buying. ASRock clearly states that the board works with Windows 7 and 8 (or 8.1). Nowhere do they claim that it works with Windows Server OS. Also, they clearly tell you the board has 4 x SATA ports so why complain that it doesn't have more? Please do your homework before you buy. As the ancient Greeks said - caveat emptor! Been running this board at home for about 5 months. Power consumption is very low and the system runs fairly cool even when left on 24/7 as a HTPC. We have a SiliconDust HD Homerun Prime cablecard TV tuner box (3 digital tuners built-in) which connects via ethernet cable to our home router. From there the TV tuner is available to every computer on our home network, both wired and wireless. Also connected to the router via ethernet cable is a Netgear 500Mbps powerline adapter. A second powerline adapter is in the other room where it's connected to the PC with the ASRock Q1900 motherboard running Windows 8.1 Pro with Media Center (installed on a Kingston 64GB SSD). There's a strong enough signal over the powerline adapter to allow Media Center to record up to 3 TV shows at once on a 2TB WD hard drive. Playback is perfectly smooth with excellent image quality. Have not played any Blu-ray discs on this PC, but there's no reason to think it wouldn't work. The whole setup has worked flawlessly and the Q1900-based PC is the lowest power consumption computer we have ever owned. It's roughly the equivalent of running a 20-watt light bulb and most of the time it idles at around 8 to 12 watts.

Pros: fast , low wattage , see other thoughts

Cons: noda

Overall Review: well I tried this motherboard with a 150w mini micro power supply and the power went down to 11w at idle . this is an incredible setup considering its low power usage. windows 7 64bit WEI total 5.2 cpu 6.5 memory 7.5 desktop aero 5.1 3D 5.9 disk 7.9 that's with 16 gigs of Kingston memory oh also almost forgot I just checked the memory timings with cpuz since it doesn't tell you anything in the bios about timings and the timings are 1333mhz at 8,8,8,23, T1 its very fast like this, runs flawless this makes the perfect HTPC and can play a few games too :) very happy windows 8.1 64bit is even faster

Pros: 4 cores Good RAM capacity Had the minimum # of SATA ports I needed USB 3.0 Low Power and high performance compared to ATOM or AMD solutions Price is right

Cons: SO-DIMM RAM but I knew that going in Limited # of SATA ports but 2 of each was fine for me 4 or more SATA3 ports would make this board the bees knees. For some reason these J1800 and 1900 boards don't get many SATA ports.

Overall Review: Created a Linux file server with this and Ubuntu 14. It boots from USB thumb drive. I checked power consumption with my watt meter and it was under 25 watts for board plus 8 gb ram, a couple of 2 tb green drives and usb thumb drive. Time will tell how long the thumb drive lasts. I also installed VirtualBox on it to run an old Windows XP machine when I need it. I have had about a half dozen motherboards for my file server for the last 15 years or so and this is one of the best so far. There is a 2 SO-DIMM version of this board if you need more memory.

Pros: Low cost very low power fanless system with a fair amount of umph. I rebuilt a 10+ yo mythtv setup using 3 of these boards. I first bought one to test with modern (0.27 as opposed to my old 0.20) mythtv SW and see how it handled the video decode task. I was so impressed I immediately bought two more. The first board is now a low power back end only system (from a mythtv perspective but it performs many other server functions). It's a headless system that lives on a shelf in my laundry room and boots with only a power cable and network cable. It's been running reliably 24/7 for about three weeks now and I have no reason to believe that it won't go for many years. With 4GB RAM, a SSD boot drive, two 4TB drives, and a gigabit network link it is drawing about 28W at the wall using an old 80+ power supply that would really like to be delivering more power. I may pick up another pico-supply as I would expect that it would be closer to 20W at the wall. (80+ isn't 80+ if you are only drawing a little more than 5% of the supply rating.) The CPU utilization rarely goes about 10% on this system and it runs cool even though it is behind bifold doors. The two front end systems are in small cases with SSD boot drives, pico-supplies, and remote control receiver HW. They connect to their TVs using HDMI to deliver a 1080p image. The cases have adequate ventilation so the systems are fanless and create no noise. Even after an extended viewing period decoding OTA HD MPEG2 being streamed over the network from the back end, I find that the CPU core temperatures are just shy of 60C while the SSD is usually 32C. The CPU has enough horsepower to decode OTA HD (720p and 1080i) in SW with about 20% utilization on 3 cores and 35% on the 4th. With HW decode (using VAAPI) the utilization drops even more. This means that even with SW decode there is plenty of CPU bandwidth left to ensure that response to user input is quick. These make great little HTPCs.

Cons: One of the memory sticks is adjacent to the end of the heat sink. If one were inclined to use a fan to blow over the end of the heatsink the memory is blocking the flow.

Overall Review: Awesome fanless HTPC. No issues with any of the three boards I bought.

Pros: Just worked with Linux, no BIOS flashing, no abtruse UEFI settings silent and quite snappy for only 10W or so

Cons: None so far, though a a model with a single DC power input option would be nice. Sort of silly to use even a 60 watt PS for this low of a power drain,

Overall Review: Graphics need 3.12 or > linux kernel Great for a fanless system

Pros: Had the SO-DIMM slots that I needed for testing laptop RAM. I have just been using this Mobo for RAM testing but it has been working great for hundred of hours of RAM testing. It supports both the standard voltage and low voltage RAM so it is perfect for my uses - doesn't seem to be picky about RAM type either - so far all brands work.

Cons: None for me

Pros: SOLID SOLID SOLID. I have this in a torrent/NAS box I built and have it on 24/7. Not a single crash or error from this thing. I also run two VM's on this machine (Windows 7 and Ubuntu) to run some scripts, no sweat. I really like the fact that it's passively cooled so there is no CPU heat sink fan noise. If you're worried about running this thing 24/7, I did not really notice a change in my electricity bill. Maybe $1-2/month at most to run it all the time with a 4TB hard drive and case fan.

Cons: Really really small con but due to the Intel graphics chipset I cannot get full resolution on my Samsung 4K monitor when remoting into the machine through Windows 7. The width of the screen is fine but the height is clipped a little.

Overall Review: If you're thinking about buying this and can wait... probably wait until "Skylake" comes out. This motherboard/cpu was released sometime in 2013.

Pros: The only thing that would make this board a better MythTV box would be to have 6 sata ports instead of 4 on the motherboard. Low power, fanless, with HDMI and Intel HD graphics makes it a near perfect HTPC.

Cons: - no built in wifi if you need it - needed to add a controller card to get to the number of ports i needed (+$40)

Overall Review: I used it to rebuild my Ubuntu NAS replacing an aging D2700MUD (atom) that never lived up to the billing. For this, I installed Mythbuntu 14.04.1 and everything worked flawlessly out of the box. After adding VAAPI for HW video acceleration, I tested it with a 1080p bluray rip and it it was using less than 10% CPU. I added a sata controller card in the PCI-e slot. It now boots to an SSD and is running a 4x3TB SW Raid5 array. Great small form solution to fit my Mythbuntu + NAS needs.