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Item#: N82E16813157390

ASRock B85M-ITX LGA 1150 Intel B85 HDMI SATA 6Gb/s USB 3.0 Mini ITX Intel Motherboard

  • Intel B85
  • Core i7 / i5 / i3 / Pentium / Celeron (LGA1150)
  • DDR3/DD3L 1600/ 1333/ 1066

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews

With excellent performance and great affordability in an ITX design the ASRock B85M-ITX is a great foundation to build a "Haswell" based HTPC or other small form factor system. It's powered by the Intel B85 chipset and works flawlessly with 4th generation Intel Core process in LGA 1150 package. This motherboard is loaded with a wealth of cutting technologies and ASRock innovations for optimized performance and system tuning. You get all solid capacitor for best durability, XFast technology for improved overall system performance, and Home Cloud technology for remote access and control. And paired with proven quality and stability, this unit is the ultimate platform for your next build.

General information

High Density Glass Fabric PCB

What you’ve never understood about your computer is that it is scared to death of water, H2O, humidity or whatever you’d like to name it. And even though you do not see the water, actually there may be lots of excessive moist in the air killing your motherboard silently and slowly. No, your motherboard doesn’t melt when in contact with water like the wicked witch of the west, but it dies of short circuit. Luckily, ASRock has a new High Density Glass Fabric PCB design that reduces the gaps between the PCB layers to protect the motherboard against electrical shorts caused by humidity.

General information

All Solid Capacitor Design

ASRock is determined to use high quality materials to build the best motherboards, that's why all the capacitors on this motherboard are built with 100% solid capacitors. These solid capacitors bring long lasting durability and ultra stable performance.

General information

XFast 555 Technology

Exclusive ASRock XFast 555 technology — including XFast RAM, XFast LAN and XFast USB technology — optimizes your user experience with fast response and low latency. To boost performance, XFast RAM creates a virtual disk from the system memory. For Photoshop, It can perform five times faster than before. ASRock XFast LAN is a smart productivity tool that helps you manage your Internet application priorities, simplify your digital life, and accomplish more. XFast USB technology boosts up the USB transfer to a new level, enabling more data to be transferred in less time.

General information

FAN-Tastic Tuning

Configure different fan speeds for respective temperatures using the graph. The fans will automatically shift to the next speed level when the assigned temperature is met.

General information

Easy Driver Installer

For users that don’t have an optical disk drive to install the drivers from our support CD, Easy Driver Installer is a handy tool in the UEFI that installs the LAN driver to your system via an USB storage device, then downloads and installs the other required drivers automatically through the internet. Completely no CD or optical disk drive required!

General information


In a world where time is money, why waste precious time everyday typing usernames to log in to Windows? Why should we even bother memorizing those foot long passwords? Nobody has time for that! Just plug in the USB Key and let your computer log in to windows automatically!

General information


Limit and control your children's time spent on the internet. ASRock OMG (Online Management Guard) technology allows you to establish an internet curfew or restrict internet access at specified times. Administrators are able to schedule the starting and ending hours of internet access granted to other users.

General information


Dampness kills most electronics, so it's a better idea to keep your personal computer dry. Now users may prevent motherboard damages due to dampness by enabling Dehumidifier. When it is enabled, the computer will power on automatically to dehumidify the system after entering S4/S5 state.

General information

ASRock APP Shop

ASRock APP Shop is designed for your convenience. We provide various apps and support software for users to download. You can easily optimize your system and keep your motherboard up to date with ASRock APP Shop.

Learn more about the ASRock B85M-ITX

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details

Customer Reviews of the ASRock B85M-ITX

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  • dylan f.
  • 2/2/2016 8:41:46 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

4 out of 5 eggsLimited board

Pros: small, good bios.

Cons: only two connections for fan, cpu and board.
memory slot A inop.
otherwise, OK.

Other Thoughts: Doing an RMA

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  • Daniel D.
  • 1/28/2016 9:50:03 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

3 out of 5 eggsSolid board for the price

Pros: - Overall, is a good board that runs well as my media PC. Paired with a Core i3-4770, 2x8gb ram and a SSD.
- Quick
- Front USB 3.0

Cons: - Not sure why it would only have 2 USB 3.0 in the back but have 4 USB 2.0, if anything it should be the other way around
- Not sure if it's a problem with the board or my case, though I'm pretty sure it's the board, when I plug 2 different devices in the front hub USB 3.0, one of the ports won't work. Of the 2 available front ports I have, both work when they are the only one in use but if both are in use, 1 of the ports won't work. In my case, it was a USB 3.0 flash drive and a Logitech USB receiver for wireless mouse/keyboard and the Logitech peripheral will also fail to work if the flash drive is plugged in, regardless of which of the 2 USB 3.0 front port I use.

Other Thoughts: - Overall, it's solid for a small build. Was able to get this on sale ($55) and pair it with Core i3-4770 ($80) so not bad for the price.

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  • Alexander D.
  • 1/26/2016 11:29:32 AM
  • Ownership: 1 week to 1 month
  • Verified Owner

2 out of 5 eggsNot so great

Pros: When it works, it does work well, and as advertised.

Cons: Lasted about a week, looks like maybe corrupt BIOS. Bizarre behavior, all testing points to motherboard. After first sign of failure, board ended up in an unusable state, strange graphical corruption in UEFI, no combinations of hardware alleviated the issue, and everything used was triple tested on other machines with no faults.

Other Thoughts: There is little more stressful than new component failure. I would recommend a different chipset, I have used Asrock hardware in the past with success, so this may be an exception.

Manufacturer Response:

Dear Alexander,

We sincerely apologize for any inconvenience this may have caused you.
Please trouble shoot the mainboard step below to check if its resolved.
• Turn the power off, clear the CMOS.
• Test with single memory module.
• Test with onboard video (remove the video card).
• Turn on the power (using onboard power button) to check if its post.

If you have any technical support inquiry, please contact us at
We will assist you shortly.

Thank you

ASRock Support
Tech Support Email:

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  • Anonymous
  • 1/24/2016 2:20:13 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsOC not supported on G3258 with new BIOS

Pros: -mini itx
-4 sata 3

I recommend this board if your doing a build that has a celeron, Pentium, i3, or i5

Cons: -no plastic on the I/O sheild, all metal
-You have to downgrade the bios to 2.30 to have overclocking options on the g3258
-Slow Internet downloads

Other Thoughts: My Rig:

Intel Pentium G3258 @4.3 GHz
8gb G.Skill Ripjaws DDR3-1400 (My CPU limits it to 1333, but I used XMP)
Intel stock cooler
Dell vostro 260 case
Mushkin chronos 480gb SSD
Corsair CX430m PSU

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  • Anonymous
  • 1/19/2016 1:40:04 PM
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggsGood amout of features for the price.

Pros: VGA, DVI and HDMI out. Optical digital audio out. Front panel USB 3.0

Cons: I can't find a case speaker output. It Shipped with BIOS 2.40 that oddly will allow Vcore up to 2 volts but has no multiplayer adjustment for my G3258.

Other Thoughts: I installed Windows 7 and flashed it to 2.30. I then overclocked my G3258 to 4.4 ghz with little more than a few clicks in the BIOS. Most everything still on auto. I noticed the Vcore is over 1.4v but it runs cool enough with the stock HSF. I spent most of a day updating Windows 7 and upgrading to Windows 10. It was working fine running Windows 10 overclocked. It went pretty smooth but took too long. I had absolutely no issues with the alleged Intel/MS sabotage of non Z overclocking until the next morning when I woke it up out of sleep and it was running 3.2 ghz again? I renamed mcupdate_GenuineIntel.dll, rebooted and it ran 4.4 ghz again. I bumped the multiplier up to 46 in Windows and it seems stable. 47 got a BSOD.

I have a Mushkin Enhanced ECO2 8GB (2 x 4GB) DDR3L 1600 running DDR3 at 1400 8-8-8-26

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  • Goran J.
  • 1/19/2016 6:48:35 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsGreat ITX board!

Pros: Great board for small desktop builds, firewalls, media center pcs, linux rigs. Paired with a SSD and a Celeron board performs great. I use ASRock most of the time and never had a single issue.

Cons: No onboard Intel NICs

Other Thoughts: This time shipping was super slow. Ordered on Thu, received it the next Wed. 6 days from Indianapolis to Chicago. Come on Fedex.

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  • James I.
  • 1/17/2016 9:04:35 AM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsWorking Properly

Pros: Running dual boot Windows 10 - 32 bit and Linux Mint 17.3 - 64 bit on a Silicone Power 120GB SSD with no issues. Typical ASRock fast booting.

Cons: None. Does exactly what I wanted.

Other Thoughts: I was reluctant to buy a ASRock B85M-ITX motherboard because of all of the comments about it not working with Linux. However, since the price was so attractive and the motherboard included all the features I wanted, I decided to give it a try. The Linux comments seem to be related to the lack of ASRock drivers for Linux. In my experience, the Linux drivers never come from the motherboard manufacturer and are either included in the Linux distribution or downloaded, as is frequently the case with printers and video cards. In my case, the Linux Mint 17.3 distribution supported my video, audio and LAN with no effort on my part. The only driver I had to install was for my Brother HL-3170CDW color laser printer.

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  • Mark R.
  • 1/16/2016 9:37:29 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsExcellent HTPC base, Windows 10 capable with some tweaking.

Pros: - Small form factor is exactly what I was looking for in a home theater PC build.
- Inclusion of S/PDIF audio, which other micro ITX variants are lacking.
- 3 separate forms of video out built on-board, if you're not using a dedicated video card.

Cons: - Newest iteration ships with BIOS version 2.4, which does NOT have overclocking functions enabled. Previous versions however, are overclock-able (see the "workaround" below if you are technically savvy).

Other Thoughts: Long story short, Windows 10 had some issues with this board and the G3258, up to the point that you either had to run at stock clock speeds, or disable a processor core (but why would you WANT to sacrifice that?!?).

After installing Windows 10, you will need to follow these steps: (thank you Cetus35, whoever you are)

1) Either disable one core of the CPU in the BIOS or remove all OC and return to stock settings or both. Whatever it takes to install Windows 10 successfully. (ignore this if you are already inside Windows 10)
2) Once booted into Windows 10, navigate to C:\Windows\System32 and find the file named 'mcupdate_GenuineIntel.dll'.
3) All you have to do is rename it. Most posts I've read say it's safe to just delete it but I prefer renaming it. Just add .old or .bak to the end of the filename. So it would look like 'mcupdate_GenuineIntel.dll.OLD' or 'mcupdate_GenuineIntel.dll.BAK' (or 'mcupdate_GenuineIntel.dll.MyStupidCat' will also work)
4) You will have to temporarily change permissions on the file to change the name since it's a system file and will say 'File Access Denied' when you try to rename it (or do anything with it, really)

Change the permissions:
This may seem like a lot of steps but it's necessary for someone who has no previous experience working with file permissions. For those who are, just set permissions as usual to allow renaming of the specified file.
1) Right-click on the file whose permissions you wish to change ('mcupdate_GenuineIntel.dll', in this case)
2) Select Properties then click on the Security tab.
3) Click on the Advanced button. A window named 'Advanced Security Settings for Data' will open.
4) Here you need to change the Owner of the file. Initially it should say the Owner is 'TrustedInstaller'.
5) Click the blue letters just to the right of that that says 'Change'.
6) A small window named 'Select User or Group' will open.
7) You will need to select a User or Group. There are a couple of ways to do this and this step may cause some confusion but here's how I do it:
a) Type your name or whatever the name is of the current user (click the Start button at the very lower left of the Desktop and the name is at the very top of the left column) into the box that is named 'Enter the object name to select'. The spelling must be exact.
b) Click on the Check Names button. It should then show the name of your computer plus the name you just entered.
c) Click OK.
8) Now you will provide yourself full access to the file. (which will allow the renaming of the file without the Access Denied message)
9) Close all the remaining open dialog boxes by clicking OK on each of them.
10) Right-click the file (mcupdate_GenuineIntel.dll) once more. Select Properties then click on the Security tab.
11) Click the Add button and the box from before named 'Permission Entry for Data' will open.
12) Click on the blue letters that say 'Select a Principal'. Once again the small Select User or Group box will open.
13) Again type in your name or the name of the current user (same as before) and click Check Names then OK.
14) This will take you back to the box named 'Permission Entry for Data'.
15) Make sure there is a check mark in Full Control then click OK and OK again to close all open dialog boxes. You can now rename the file.

Okay, once you made it this far, you need to go to ASRock's website, and download the *2.20* BIOS driver executable for Windows. Find it here:

After you run this exe, you will be spit back into BIOS where it will "downgrade", and re-enable your overclock functionality. I'm sitting happily at the 4.0ghz preset that was in the selection. I hope this helps!

1 out of 1 people found this review helpful. Did you? Yes No

  • James I.
  • 1/16/2016 2:13:09 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

5 out of 5 eggsNo Problems

Pros: Replaced older Intel LGA 775 ITX motherboard in iStarS-0112-DT Case using Pentium G3258 and Thermaltake Gravity i1 cooler. Running Windows 10 32 bit and Linux Mint 17.3 64 bit flawlessly.

Cons: None

Other Thoughts: Was reluctant to buy this motherboard because of reports of it not supporting Linux. Apparently the latest Linux versions address those issues.

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  • Anonymous
  • 1/15/2016 6:28:40 PM
  • Ownership: 1 day to 1 week
  • Verified Owner

4 out of 5 eggsGreat board

Pros: Price and features.

Cons: Transistor or chip in the stay out zone for back plates.

Other Thoughts: Great board, but there is a chip of some kind on the back of the board and the back plate of the hyper evo 212 hits the chip. I used a spacer to clear it, its odd as its the only chip on the area.

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Item#: N82E16813157390
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