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MSI Z77A-G45

Seven Sub-$160 Z77 Express Motherboards, Reviewed
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Two enormous voltage regulator heat sinks, three graphics card slots, and an I/O panel full of connectors are perfect examples of how MSI sees its Z77A-G45 taking back the value crown from a certain similarly-priced competitor. Aesthetics aside, we’ll put those big sinks to use in our heat and overclocking analysis.

Those three long slots are configured as x16-x0-x4 or x8-x8-x4, with the four-lane slot deriving its connectivity from the Z77 PCH. That actually makes this a two-way SLI motherboard, according to both its slot configuration and its silk-screened logo, with the top two slots sharing the CPU’s sixteen PCIe 3.0 lanes. Three-way CrossFireX is available via the third slot, but we wouldn’t hamper any high-end card with so little bandwidth. These slots put the Z77A-G45’s graphics capability on-par with the more-expensive Gigabyte and ECS products in today’s comparison.

The biggest problem with the slots is not configuration, but documentation. MSI refers to the Z77A-G45 as three-way SLI-compatible, but Nvidia doesn’t support a third card through the slower four-lane, second-gen slot. And the documentation foibles don’t end there, as both the manual and specifications page try to convince us that both slots are 16-lane-capable. Four two-lane pathway switches above the top x16 slot let us know otherwise, and we think (or at least hope) that these documentation mistakes were accidental.

MSI saves one of the Z77’s PCIe 2.0 lanes by omitting the PCIe-to-PCI bridge needed by certain competing boards to support legacy slots, and then uses it on a PCIe-based network controller. Only three PCIe 2.0 lanes remain to feed four x1 slots, so MSI decided to connect both of the center x1 slots to the same pathway. These can’t be used simultaneously. Appearing to be a blatant move to artificially bolster the board’s spec sheet, we think MSI should have simply left off the x1 slot immediately below the top x16 interface. The GPU coolers of most high-performance graphics cards cover that slot anyway.

MSI doesn’t include a Port 80 diagnostics display to assist overclocking diagnostics, but does add a row of voltage checking points near the board’s front edge to address an overclocker’s voltage monitoring needs.

The Z77A-G45’s layout is fairly straightforward without any major issues to affect a majority of new builds. Users upgrading older systems may find that their hard drive cage blocks access to the board’s forward-facing SATA and USB 3.0 slots, or even that their front-panel audio cables are too short to reach the bottom-rear corner header. If either of these appear in doubt, we recommend starting your upgrade with a better case.

The Z77A-G45 we received was packaged for a different region, without the SLI bridge we would have expected. A quick check with one of our favorite vendors showed that U.S.-destined boards do get that part, but are still limited to two SATA cables.

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  • -3 Hide
    SpadeM , July 23, 2012 6:16 AM
    LAN performance .. ISC performance ... USB 3 .. well that's it then.
  • 1 Hide
    Crashman , July 23, 2012 8:48 AM
    SpadeMLAN performance .. ISC performance ... USB 3 .. well that's it then.
    Tom's Hardware has several controller comparisons, and publishes new ones frequently. So unless you think one of the boards has a broken controller, wysiwyg.

    The things that actually get screwed-up are typically related to the clock generator, multiplier control, memory timings and power options.
  • 0 Hide
    nikorr , July 23, 2012 9:54 AM
    I would place the ASRock and Gigabyte on the top as well : )

    Nice review.
  • 0 Hide
    jaquith , July 23, 2012 11:45 AM
    I always appreciate your Articles! :)  I know how much work you do to get them done.

    You're kidding - Biostar. I guess this article is not about the 'Best Sub-$160 Z77' MOBO's but about the best manufacturers sent you. The cheapest MOBO I recommend for the SB/IB (K) is the ASUS P8Z77-V which pops your 'unique' budget cap depending where you shop; found it here for $159.99 - http://www.gadgetneeds.net/asus-p8z77-v-atx-intel-motherboard/

    Interesting you didn't get an ASUS P8Z77-V LK ~$120 which offers SLI. The ASRock Z77 Extreme4 and Gigabyte Z77X-D3H for the price aren't bad.

    There's NO WAY I'm recommending Biostar in the forum, folks and myself would thing I've lost my mind.
  • 1 Hide
    jimishtar , July 23, 2012 11:47 AM
    It would be nice to see the CPU voltage for every board when overclocking.
  • 4 Hide
    Crashman , July 23, 2012 12:21 PM
    jimishtarIt would be nice to see the CPU voltage for every board when overclocking.
    1.25V
  • 0 Hide
    gorillagarrett , July 23, 2012 12:33 PM
    No peripherals performance tests? Those are the only tests that differentiate those motherboards from each other.

    Would really like to see how the UD3X Atheros Ethernet controller fares against the Intel and broadcom ones.
  • 3 Hide
    Crashman , July 23, 2012 12:38 PM
    gorillagarrettNo peripherals performance tests? Those are the only tests that differentiate those motherboards from each other. Would really like to see how the UD3X Atheros Ethernet controller fares against the Intel and broadcom ones.
    I'll let the integrated controller guy know you'd like to see those parts compared :) 
  • 0 Hide
    gorillagarrett , July 23, 2012 12:42 PM
    Quote:
    I'll let the integrated controller guy know you'd like to see those parts compared


    Thank you!
  • -1 Hide
    rolli59 , July 23, 2012 1:34 PM
    I would have liked to see the Asus P8Z77V-LK version instead of the LX since it is better equipped.
  • 0 Hide
    Crashman , July 23, 2012 1:37 PM
    rolli59I would have liked to see the Asus P8Z77V-LK version instead of the LX since it is better equipped.
    It's also mentioned in the article. It was over $160 (at $165) when the comparison was set up.
  • 0 Hide
    nevertell , July 23, 2012 1:44 PM
    Why are there no DCP latency tests ? These differentiate the motherboards
    This is what differentiates them performance wise.
  • 0 Hide
    pacioli , July 23, 2012 3:33 PM
    Wow, Biostar...? I wonder what the longevity of that board is...
  • 0 Hide
    Crashman , July 23, 2012 3:36 PM
    pacioliWow, Biostar...? I wonder what the longevity of that board is...
    It's hard to tell, but the last Biostar board I had in a system lasted 12 years before it got dismantled for its entire processor selection being too slow.
  • 0 Hide
    CaedenV , July 23, 2012 4:17 PM
    Nice to see a Mobo review where the charts are not all identical bars lol. It has been a long time sense the stock performance has had much of any variance between brands, and we are getting much more feature variety as well. I thought as more and more parts became integrated into the CPU that the bars would become more and more similar, and mainstream features would become more and more homogeneous.

    Also, I love the True Studio Pro software, if you are running digital audio it really makes any idea of a dedicated sound card a thing of the past. Every computer I build now either has True Studio Pro with the mobo, or I purchase the MB2 software suite, it makes such a difference if using headphones or quality speakers, and much less buggy that Creative's sound cards and driver issues that we all know and love.
  • -5 Hide
    jamie_1318 , July 23, 2012 4:18 PM
    On-motherboard start buttons are a useless feature. Anyone who could actually use it should know they can just short across the power switch header using any piece of metal.
  • 0 Hide
    delaro , July 23, 2012 4:28 PM
    At this point SATA 6GB, USB 3 and PCI-e 3.o should be a standered and not a side option.
  • 0 Hide
    g-unit1111 , July 23, 2012 4:34 PM
    As good as Asus motherboards are - why do they include such poorly made I/O brackets? Even Biostar and ECS include ones that are better made than Asus does.
  • -2 Hide
    goinginstyle , July 23, 2012 5:06 PM
    Another comment about why the P8Z77V-LK board was not reviewed. I own this board now after a total disaster with one of the boards you awarded so why is it missing? The ASUS P8Z77V-LK was priced at $149.99 when I purchased it and is now $139.99 with a rebate down to $119.99 after a quick check this morning. Based on your comments about the Biostar and ASRock boards having additional features like SLI/CF or additional USB 3 ports it is hard to understand why this board was not reviewed. The P8Z77V-LE is priced at $165 not the LK board. As to the 4-dimm testing, did you try the DDR3-2666 ratio or is the test overclocking the 2400 ratio?
  • 0 Hide
    Crashman , July 23, 2012 5:19 PM
    goinginstyleAnother comment about why the P8Z77V-LK board was not reviewed.
    Because it was priced at $165 two months ago when the invitations went out. End of story.
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