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Written by Hank Tolman   
Sunday, 11 September 2011
Table of Contents: Page Index
MSI A75MA-G55 AMD FM1 Llano Motherboard
Closer Look: MSI A75MA-G55
MSI A75MA-G55 Detailed Features
AMD A-Series A75 Fusion Chipset
MSI A75MA-G55 Specifications
Testing and Results
AIDA64 Extreme Edition v1.1 Benchmarks
Passmark PerformanceTest
3DMark Vantage DX10 Benchmark Tests
3DMark Vantage DX10 Benchmark Tests
PCMark Vantage Benchmark Tests
SiSoftware Sandra
Cinebench R11.5 Benchmarks
DX10 and DX11 Gaming Benchmarks
Video Transcoding Tests
A8-3850 Overclocking, Power, and Temperature
MSI A75MA-G55 Motherboard Conclusion

A8-3850 Overclocking

Overclocking the Lynx platform is quite a bit more difficult than it was on the previous generation of AMD platforms. The Athlon-II and Phenom-II series of CPUs were excellent overclockers, and it was easy to do. With Black Edition Processors, the CPU multiplier was unlocked and you could crank it up as high as it would go and still boot. This is the best way to overclock the CPU alone, as increasing the reference clock ends up overclocking the RAM and GPU (if one is onboard) as well. On the A-Series APUs, however, the reference clock is the only way to overclock. Overclocking enthusiasts were dismayed when the Sandy Bridge CPUs were locked down tight on the H67 boards and severely limited on the P67 boards. Luckily, the AMD A-Series APUs are not limited to Turbo overclocking only, but, as I said, the only way to overclock them is through increasing the reference clock. The CPU and GPU are completely locked.

MSI_A75MA_G55_Box.jpg

I must admit that overclocking the MSI A75MA-G55 motherboard was a little more difficult to do manually than it was on the ASUS F1A75-M Pro motherboard. I think a lot of this had to do with the fact that the A75MA-G55 uses a BIOS instead of a much more friendly uEFI. Still, the manual overclocking wasn't that difficult. Unfortunately, the AUTO settings for voltage didn't increase automatically as I pushed up the reference clock like they did on the ASUS motherboard, so I had to manually adjust CPU and RAM voltages in addition to the reference clock. Just like with the ASUS motherboard, I had to tune down the RAM settings on the A75MA-G55 motherboard in order to get a decent overclock. Since I can only adjust the reference clock, it affects everything, including the memory bus. The integrated GPU didn't have any problems adjusting to the overclock. In fact, I wouldn't be surprised if there was actually more headroom in the GPU for higher overclocking. Unfortunately, I couldn't overclock it separately from the CPU due to the reference clock only restrictions.

Unsurprisingly, I reached the exact same overclock with the MSI A75MA-G55 motherboard as I did with the ASUS F1A75-M Pro motherboard, 130MHz on the reference clock.

Temperature

The MSI A75MA-G55 runs very cool. That being said, it ran a couple of degrees hotter than the ASUS F1A75-M Pro motherboard. These temperatures are still extremely cool.

Fresh Startup (15 min idle)

25 degrees

After 2hr Netflix Stream

37 degrees

Prime95 & Furmark Stress Test (2hr)

53 degrees

After 24 hours of normal use

39 degrees

Power Consumption

The Power Consumption on the MSI A75MA-G55 beat the already impressive ASUS F1A75-M Pro by at least a few watts in every measurement except the Netflix stream, where it pulled 1W more power. Still the power consumption was higher than that of the Intel H67 platform, even with the i5-2500K processor.

Idle

43 Watts

During 2hr Netflix Stream

91 Watts

Gaming

114 Watts

Prime95 & Furmark Stress Test (2hr)

154 Watts




 

Comments 

 
# RE: MSI A75MA-G55 AMD FM1 Llano MotherboardClaydough 2011-09-13 04:42
Per the ps2 not needed argument...
I thought 5 simultaneous button keyboard presses ( w + a movement + shift run with a spacebar jump fer instance ) were still only possible using a ps2 cable or adapter?
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# RE: RE: MSI A75MA-G55 AMD FM1 Llano MotherboardClaydough 2011-09-13 04:43
-edit

oops meant 4 presses..
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# I don't know.Hank 2011-09-13 07:09
If that is true, I will have to re-think my opinion. I do play games, after all, and that would certainly come in handy. I'll look into it and get back with you.
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# 6KROHank 2011-09-13 15:13
Sooo.. It is true that USB Keyboards are limited to 6 simultaneous key presses. They are known as 6KRO (Key Roll Over). PS/2 Keyboards are known as NKRO because there is no limit to the amount of keys that can be pressed at the same time and still register. Also, 6KRO USB Keyboards are limited to 4 modifier keys out of the 6 that can be pressed simultaneously. Modifier keys are alt, ctrl, shift, etc. They modify what the next key press does.

So, in that case, my opinion still stands. Even gaming, I'm not sure when I would push more than 6 keys at a time and I'm relatively sure I've never used more than 3 modifier keys at once.

Also, PS/2 keyboards have other limitations. Sure, you can press 188 keys at once, but you can't use a function key. Also, any of those specialty keys, mostly used for media functions, won't be found on a PS/2 keyboard. Oh, and those gaming keyboards? Forget about it.

-Hank
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# ghostingclaydough 2011-09-14 19:24
Researching myself, besides an interesting debate with the mechanical keyboard-centric purist @ geekHack:
#geekhack.org/showthread.php?5572-USB-vs-Ps2-Keyboards/page3
Where the consensus seems to be that ps2 polling is less intrusive, potentially less cpu intensive and in the end more responsive...
The ghosting problems ( multi-button rollover fail ). Doesn't seem to be limited to USB anyway. My sidewinderx6 seems to behave with most all my important navigation combinations cept for ctrl failing with certain combinations. ( in which case the ability to map crouch to at least press on/off is greatly appreciated ) But then again I found A ps2 version of intellipoint Pro that I might try morrow. But again ghosting seems to be a problem anyway with any given keyboard whether it's Supposed to support at least 6 rollover keys or not. :-(
Neat geekHacks thread read either way.
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# RE: MSI A75MA-G55 AMD FM1 Llano MotherboardTino 2011-12-17 18:31
Great review.

I couldn't find if the DVI port is Single-link or Dual-link. It doesn't say in the MSI's page.
Ive got a Dell U2711 (2560x1440), and I need a mobo with DVI-DL or DisplayPort to use it in native resolution. HDMI or DVI-SL only shows 1920x1080.
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# RE: MSI A75MA-G55 AMD FM1 Llano MotherboardTino 2011-12-17 18:35
About the FIS Switching, is necessary for using eSATA docks like TT BlacX Duet. Without FIS, you can use one port only (unless you use the USB 2.0 interface).
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# RE: RE: MSI A75MA-G55 AMD FM1 Llano MotherboardFred 2012-10-08 18:10
regarding the FIS switching the review says that the A75 FCH can utilize FIS based switching but the A55 cannot.
anybody know what the best graphics card works with an A6-3550 soon to be upgraded to an A8-3870 and what the benifits are to do dual graphics?
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# Apu `s and the a75 mbA6 6530d liano owner 2013-09-26 13:27
i am very happy i bought the buldozer Apu a6 its an monster al the new series Apus are stabalized core mine is still more powerfull then the current a 10 buldozer its powerfull but its stabalized and easyer to un lock if mine is fully unlocked then i need to sit on my system cuase it will fly away did an bench mark and came to my discovery tha it has cntrole mannidgeable self sutain system it means 12 core cluster of 5.8 ghz 8 for power 4 for distrubution controle to keep eth other 8 in check

i peaked over 72.0000 mhz an sec per core cluster not funny i can run 32x multyplyer and then its stable enough to do some bad as ripping it whas faster then the i7 pentuim and i9 had serious trouble its an awsomecombination this a75 chipset with the first gen a6 liano i can push it to 3.8 in optimalisation if i go water cooling i push 5.8 could go to 6.2 but thats dangerously risky just with the right tuning that system just uses his fins thill 3.8 and it wont get higher then 75 degrees i find that verry impressiv i down graded it to respectfull 3.2 thats perfect for gaming blew 3 gddr5 graphics cards in the last 2 years this year in doing it right shuff in 4 x 8 gb mem 2200 mhz heh and and decent expensive grahics card and am contend for the next 15 years
its has capabillaty of 64ggb memory insurtion

thats some bad as power and my mb has 2 x pci xpress 16x slots and 2 regular and the 6gb works like an charm no delays for some on that wants to buld an good pc for low costs this is it defently
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