Demand for mini-ITX boards built around Intel’s socket 1156 has been rather high this year, and as a result, vendors like DFI, ECS, Intel and Zotac have enjoyed free reign of sales despite releasing products that don’t necessarily live up to or meet user expectations. Going mini-ITX means there will always be a few compromises on the hardware/peripheral front (many of which users are prepared to stomach), but what makes things less palatable all-round is when boards are delivered with partially functional BIOSes that lack any real finesse or control of key features. Sensing an opportunity, Gigabyte has stepped in to the fray with the keenly priced H55N-USB3 (MSRP $105) and is looking for a slice of the mini-ITX pie. It’s certainly a welcome move, because in general, Gigabyte delivers feature-packed BIOSes that are well laid out and easy to use.

We’ve been lucky enough to get acquainted with Gigabyte’s H55N-USB3 motherboard over the past week, and for once have our review ready around launch time. We’ll tell you right now that we rather like this little board, there are a few things that need attention, but overall it’s the best socket 1156 mini-ITX motherboard that’s passed through our hands to date. So without further ado, we’ll go straight to board pictures and layout commentary:

Gigabyte starts off with the standard Intel mini-ITX layout, placing the PCH above the processor, shifting the socket downwards and rather close to the lone PCIe slot, leaving no room for tower type processor coolers if the PCIe slot and both DIMM slots are occupied. The PCIe socket latch can also be a pain to get to when using the intel stock cooler as spacing is very tight.

The H55 has provision for up to six SATA ports, Gigabyte like other mini-ITX vendors are providing us with four, plus an eSATA port on the rear IO panel. As this is the H55 chipset, we forgo the option to run RAID, so if you’re looking for RAID functionality, Intel’s DH57JG is still the only option.

A total of six USB ports are available on the rear IO panel (four are on-board via headers).  Legacy lovers get VGA and a PS2 combo port for older hardware while DVI and HDMI out are on-tap for the newer stuff. The two blue ports are USB 3.0, fired by NEC’s controller, making this the only H55/H57 based mini-ITX motherboard with USB 3.0 as standard. Sure, plug in USB 3.0 PCIe cards are readily available if we choose to go with another vendor’s mini-ITX board, but that only makes sense if you don’t need the lone PCIe slot for anything else. USB 3.0 may not be an outright killer feature, but it certainly makes a nice addition to mini-ITX without sacrificing some of the limited upgrade options enforced by a small form factor.

The H55N-USB3 has just hit retailer shelves, Newegg have it on sale here. Team this board up with Lian Li’s PC-Q08B, and we’ve got the making of a fine little gaming machine, everyday PC, or file server. Whoops! We’re getting a bit carried away, there’s a review to finish and features to discuss first…

We mentioned tight socket~slot spacing and heatsinks earlier, here’s another reason why some aftermarket cooling solutions won’t fit without a few modifications:


Large cooler backplates may have problems – the Corsair H50 won’t fit (due to the circled transistor).

The lower right CPU mounting hole is surrounded by a few ICs, transistors and other small SMT components, which will cause problems with larger backplates such as those used by Corsair’s venerable H50 all-in-one water cooler. Excessive pressure on any of these ICs will crack component casing, resulting in a dead board. Just a little more thought from Gigabyte to this situation would not have gone amiss.



As far as we know, Gigabyte is shipping boards with either the F2 or F3 BIOS, which is also where our test journey began. One thing that tripped us up testing these early BIOSes was an issue we’ve seen before on Gigabyte’s H55/H57 boards. Setting AHCI mode for SATA ports results in not being able to boot from our Pioneer 215-DBK SATA DVD drive (IDE mode works fine). Fortunately there is a workaround for this, press the pause key during the POST sequence just before the drive boot sequence starts, let the board pause for a few seconds and then resume. We’ve reported the problem to Gigabyte and a fix BIOS should be up on the support site shortly, so you won’t need to work around if you flash over.

For Clarkdale processors, overclocking and underclocking is made easy thanks to a fully working multiplier control, and the ability to under-volt or over-volt CPUs in the H55N-USB3 BIOS. Memory overclocking is also rather good, all memory sub-timings are available, and each timing has an AUTO parameter which will scale with frequency, requiring no user-intervention to reach high operating speeds.

The Lynnfield story is tempered a little because when used with our i7-875K processor, the current BIOS won’t allow us to set a 23x or 24x multiplier. We’re either confined to 22x and under, or 25x and over. Given the limited cooling options and power delivery limitations we managed a stable 3.66GHz which passed Linpack with all cores loaded. This may not sound like much, but it is better than what can be achieved on boards from ECS and Intel, and betters boards from DFI and Zotac slightly by virtue of being stable at higher memory speeds. DFI limits their board to 180 BCLK, while Zotac have locked VTT to a 1.20V maximum, which will prevent the memory controller from scaling past a certain point.   

Other areas of testing were glitch free, and right on the money for things like S3 resume (we tested up to 200BCLK) and plug-in peripheral compatibility.

Gigabyte do bundle quite a bit of software with their boards, and although we don’t find use for much of it personally, we’re happy to report that what you get with the board does work as intended for the most part. One of the glitches we found were with Gigabyte’s overclocking tool called OC Tuner; failing to report the VTT we’d set in BIOS correctly on occasion. Still, we don’t think there will be a huge need for OC Tuner on the H55N-USB3 as on-the-fly overclocking is best left to motherboards that are designed to be used for professional benchmarking purposes and that’s not this board’s intended purpose at all. 

The other problem was with some of the custom options of Dynamic Energy Saver which failed to respond to any of the low power changes we made to bus speeds. However, the rest of the phase switching modes work fine, and you can underclock this board rather well if need be via BIOS, so it's not something that we're going to be too harsh about, although we expect software to work as advertised. These problems have been reported back to Gigabyte, who told us a fix should be available shortly.

An extra fan header and extra speed control features would have been a nice touch. Currently, speed control is on offer for the CPU header only. That and the fact that spacing is tight for certain CPU cooler backplates are the only downers we can think of.  We’d possibly like to see some of the voltage ranges on tap for Lynnfield processors tightened up to prevent board failures, although Gigabyte are happy to leave things in the hands of over-current protection to shut the board off if users push too far. We decided to put this to the test and found that the over-current protection does work as intended. Whether or not it’s a global failsafe in the hands of users though, remains to be seen.

Everywhere else, we think Gigabyte’s H55N-USB3 is well-executed enough to become the de-facto choice for a Clarkdale based mini-ITX build, unless you have specific need for out-of-the box RAID which the H55 chipset does not support.

For a look at comparative performance figures, power consumption and overclocking results read on…

Performance Summary and Overclocking
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  • Rajinder Gill - Tuesday, June 15, 2010 - link

    I've just searched the web and found reports of TV tuner cards working with the Intel DH57JG with a Clarkdale CPU. Hope this helps shed a bit of light. I'll get some PCIe cards in to help out with testing this end too.

    I will contact Gigabyte for you first thing. Which motherboard is it?

  • ajp_anton - Tuesday, June 15, 2010 - link

    Motherboard: ga-h55m-ud2h
    Tuner: pxdtv 2300h

    Doesn't really matter to me now, I sold it and went for AMD instead.
  • Khenke - Tuesday, June 15, 2010 - link

    Was planing to build an ultra compact gaming rig (and build a case my self) with this moderboard an i5 750 and HD5850. My aim was to OC the 750 to 3.8GHz and use the H50 to cool it, but thanks to you guys I now know I have to wait until Asus releases a mini-itx card and do it right.

    But what would be nice is if you could test any other cooling on it that fit (so we know if any coolers at all fit), preferably low profile coolers as I want my case no thicker than 12cm :)

    Thanks for en excellent review.
  • Rajinder Gill - Tuesday, June 15, 2010 - link

    If you're willing to do a bit of DIY, you can trim the mount of the H50 down a bit to fit the hole. Not ideal I know. I'll see if Gigabyte have a list of low-profile coolers that will work (or if they'll put a list together) - any updates and I'll post back here.

  • forumator - Tuesday, June 15, 2010 - link

    Nice, would be great to have that info, thanks Rajinder.
  • Khenke - Tuesday, June 15, 2010 - link

    Ah. Thanks Raja.
    Since I'm planing to make an all aluminum 19x27x12cm (inner size so add max 1cm for the material) case a little work on the H50 wont be much of a problem :)

    But I am very interested in a list with low-profile coolers too, since I could slim it down 1cm then.. :)
    The H50 was the solution for a very bad placed cpu socket.
    Been hunting some info on compatible coolers but with no luck so far.
    I so want to get my gaming rig in a backpack..
  • Rajinder Gill - Tuesday, June 15, 2010 - link

    Off the bat, anything push-pin will work. Not sure how many push pin type coolers there are that make any sense over the Intel cooler though.

    Anything with a screw clamp fitting will need to be assessed on a case by case basis, as there are also some SMT resistors and a couple of what look to be feedback compensation capacitors to the left of the hole (near the circled transistor). You really don't want to knock those off or damage them.

    I'll ping GB in the morning and see if they want to put together a list for their homepage - I suspect a lot of people will appreciate the info. I only have a couple of old tower sinks and the H50 at hand, so I've either gotta scour around the web hoping I call it right, or enlist some help :)

  • jaydee - Tuesday, June 15, 2010 - link

    I am glad you posted results from "AutoCAD 2010 x64—Cadalyst 2008" with both the IGP and the discrete video card. Is there any chance we can see this benchmark on video card reviews (Ryan)? I'd be really interested in seeing a comparison of 3D benchmarks as well as games across the video card spectrum.
  • forumator - Tuesday, June 15, 2010 - link

    Would have liked more info on what aftermarket coolers will fit with a graphics card in the pcix slot...especially ones that would fit in a small case, this is a MITX board after all
  • jaydee - Tuesday, June 15, 2010 - link

    I would think that'd be way more dependant on the case, than it would be the motherboard.

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