Six A75-Based Motherboards For AMD’s A8 And A6 APUs

By Thomas Soderstrom
published

Advanced on-board graphics put AMD’s Llano-based APU far ahead of Intel’s Sandy Bridge architecture, at least when it comes to 3D apps. But you’ll still need a new motherboard to support the Socket FM1 platform. Today we test six affordable contenders.

Overclocking ASRock's A75M

ASRock doesn’t let a low price stand in the way of an overclocker’s desires, instead equipping the A75M with most of the settings needed to extract optimal performance from the finished build.

Builders can set the CPU multiplier up to 47x, and CPU-Z even shows the added frequency. However, our multiplier-locked processor stayed true to its 26x ratio, in spite of that errant reading (as determined by benchmarking the overclocked system). The only useful method for overclocking is via the APU's reference clock, and the A75M is very good at using this method.

Our VGA output stopped working above a 107 MHz base clock setting, necessitating the use of HDMI to retain integrated GPU functionality.

The A75M even includes CPU Load-Line Calibration to assist in the removal of “droop” under high CPU loads. We didn’t need it, as the board pushed our CPU to 1.40 volts under four threads of Prime95 using its 1.365 V core setting.

Primary and secondary memory timings are also adjustable within realistic ranges. Each menu item must be changed from “Auto” to “Manual” to reveal a second menu beneath it.

Thomas Soderstrom
Thomas Soderstrom
Thomas Soderstrom is a Senior Staff Editor at Tom's Hardware US. He tests and reviews cases, cooling, memory and motherboards.
45 Comments Comment from the forums
  • dogman_1234
    Thank You for the Review. I am glad to see you guys taking this and pushing it to the limits. Can't wait until SB-E and Bulldozer reviews.

    Qne question, what does the APU,( either the A6 or the A8), have on F@H applications?
    Reply
  • Crashman
    dogman_1234Thank You for the Review. I am glad to see you guys taking this and pushing it to the limits. Can't wait until SB-E and Bulldozer reviews.Qne question, what does the APU,( either the A6 or the A8), have on F@H applications?Since I haven't joined F@H, I can only recommend going to a F@H forum to find someone who's tried it.

    I know F@H is a great cause, might cure cancer etc, but wouldn't it be more geeky to search for radio signals of little green men?
    Reply
  • _Pez_
    what about blue-ray playback? and power consumption when playing it. I'm planing a HTPC. And those small form factor are really appealing. especially Gigabyte’s A75M-UD2H, I will get that one.
    Reply
  • Crashman
    _Pez_what about blue-ray playback? and power consumption when playing it. I'm planing a HTPC. And those small form factor are really appealing. especially Gigabyte’s A75M-UD2H, I will get that one.SFF properly translates to DTX and Mini ITX. These are Micro ATX...

    I checked the CPU reviews and didn't see anything there either. You know it's going to be low utilization for these processors, which means it will be closer to the idle power than to the full-load power...
    Reply
  • buzznut
    I remember when the Gigabyte board first was launched, I though it looked pretty sweet then even posted a poll on it. I'd have to agree, it seems like the board to have for A8. Looks good too, although I a find Gigabyte's non-blue/white scheme offerings more attractive. Just ordered my 990FX UD5, can't wait!
    Reply
  • buzznut
    CrashmanSFF properly translates to DTX and Mini ITX. These are Micro ATX...I checked the CPU reviews and didn't see anything there either. You know it's going to be low utilization for these processors, which means it will be closer to the idle power than to the full-load power...
    I think micro atx fits into plenty of SFF cases. Maybe we need to redefine..

    I'd like to see a showdown of mini itx boards though, I think Anand did something like that recently. That's probably where the A8 CPU's need to go head to head with atom anyway, most reviews I've seen show the CPU's aren't all that cut out for desktop. Maybe the next batch that comes out in Q4/Q1 2012 will be better for desktop.
    Reply
  • tacoslave
    buzznutI think micro atx fits into plenty of SFF cases. Maybe we need to redefine..I'd like to see a showdown of mini itx boards though, I think Anand did something like that recently. That's probably where the A8 CPU's need to go head to head with atom anyway, most reviews I've seen show the CPU's aren't all that cut out for desktop. Maybe the next batch that comes out in Q4/Q1 2012 will be better for desktop.lol wut? Dude you got this QUAD CORE based on the phenom II architecture mixed up with the e-350 or the c-50 those are the ones that are going up against Atom.
    Reply
  • Crashman
    buzznutI think micro atx fits into plenty of SFF cases. Maybe we need to redefine.That would make you part of the problem rather than part of the solution.

    1.) SFF originally stood for Shuttle Form Factor and was proprietary, using 2-slots.
    2.) It was copied by companies like First International Computer and AOpen
    3.) AMD established a standard for "open architecture" systems of similar design, called DTX.
    4.) ITX is smaller than DTX and fits DTX cases.

    Notice this has nothing to do with Micro ATX. People who claim that anything shaped like a cube is SFF need only be shown a full ATX cube before they start making excuses. People who point to horizontal cases and say SFF need only look at ancient AT desktops before they're forced to come up with excuses.

    2-slots. That's what makes Shuttle copies different from everything else. Cubes can be any "size", HTPC's can be any "size", if SFF is a size standard it can only be used to apply to two-slot cases.

    Some competitors have been trying for years to expand the definition of SFF. They are, of course, wrong.

    Nobody's perfect, one of Tom's old team members once said that barebones always refers to SFF systems (even though full sized barebones existed long before SFF). But at least Tom's tries to fix those types of errors rather than force them into the vernacular.

    I'm just asking people to be specific. If you mean cube, say cube. If you mean desktop, say desktop. If you mean mini-tower, slim tower, or slim desktop, just say it. Then apply a form factor "Mini ITX slim tower" or "Micro ATX desktop". And if you're saying "SFF" rather than media center, well it's obvious that SFF can do other things so just be specific and say media center.

    If you're not specific, you might find yourself in a discussion about what the meaning of "is" is.

    Reply
  • noob2222
    I have the gigabyte board and undervolted by .2 running stock speeds. Its used for my HTPC setup so for me making it silent and less power draw were the key points. I have an oversized fanless heatsink and never have issues. When I do run a game on it for fun, the case fan will kick up, but watching movies it stays silent.

    Would love to see some benches on the gigabyte with those max overclock numbers as the GPU would benefit greatly from the memory oc.
    Reply
  • Crashman
    noob2222I have the gigabyte board and undervolted by .2 running stock speeds. Its used for my HTPC setup so for me making it silent and less power draw were the key points. I have an oversized fanless heatsink and never have issues. When I do run a game on it for fun, the case fan will kick up, but watching movies it stays silent.Would love to see some benches on the gigabyte with those max overclock numbers as the GPU would benefit greatly from the memory oc.Good News! Tom's Hardware is working on a memory article using one of these boards, and has included games in the test!
    Reply