My Adventure with the Asus T91MT Tablet Netbook

imageI bought a netbook!

It’s a Tablet PC with a multitouch display AND a stylus for handwriting/precision and it comes preinstalled with Windows 7 Home Premium on it.  Built-in Bluetooth, 802.11n, camera, 2 USB ports, 2 SDcard slots, VGA & Ethernet… and 32GB of storage however it’s a Solid State Drive (SSD) so all accesses are lightning fast.  Windows 7 boots up to the Welcome screen in 20 seconds.

Of course it only comes with 1GB of RAM only which is easily upgradable.  I purchased the following 2GB DIMM from Amazon for $39 which is specifically compatible with the T91MT.

  • AMAZON: Crucial Technology CT25664AC800 2GB 200-pin SODIMM DDR2 PC2-6400 Memory Module ($38.99)

Turn of the device completely then unscrew the back and replace the 1GB DIMM with the 2GB.  When you first turn on the device, hit F2 until a menu appears asking if you want to go to System Setup.  Allow it to do so and from there you should see that 2GB is registered as system memory.  Hit SAVE & EXIT to allow the system to save it’s recognition of the new 2GB memory module.  Let Windows 7 boot which will

The processor in this thing is a ATOM Z520 clocked at 1.3Ghz.  This isn’t a very fast processor at all.  It turns out that it’s easily overclockable using a simple tool called SetFSB.


  1. Download SetFSB (shareware version), give the author $5 for his time, and get a activation key.  No, this will not work with the freeware version.
  2. Disable SuperHybridEngine.  This requires killing the SystemTray tool by right clicking the “AH” icon and clicking EXIT.  It also requires that you remove the SuperHybridEngine service from running.  The easiest way to do this is to download CCLEANER and go to TOOLS-STARTUP then disable the SuperHybridEngine process.  Finally, set Windows power scheme to Maximum Performance / Always on within Control Panel-Power.
  3. Run SetFSB, select ICS9LPR427CGLF (a little more than half-way down the list), click “Get FSB” button, & play with settings.  Setting the values to 260/760 will net you a CPU frequency of 1585.6Mhz and this generally works.  Hit “Set FSB” to apply the new frequency.  Going higher is at your own risk:  If your device freeze, turn it off immediately by holding down the power switch.  If “Set FSB” is successful in applying the new clock speed, hit the “Capture” button to keep this setting in the future.
  4. Download and run wPrime, post results along with clock speed achieved.

[modified version of instructions taken from]

You can overclock it up to 1.8GHz with high speed memory installed.  Most memory modules will only allow you to overclock to 1.6Ghz before it starts locking up and getting completely unstable.

It’s important to have the most recent BIOS and drivers available.  Fortunately, they’re all located in the same area.

2 Responses to My Adventure with the Asus T91MT Tablet Netbook

  1. Ki-tae Kim says:

    Hi, Kurt. I have stumbled upon your blog while searching for info for the T91MT memory module and realized that there are two speeds available for the tablet:

    1. 2GB 200-Pin DDR2 SO-DIMM DDR2 667 (PC2 5300)
    2. 2GB 200-Pin DDR2 SO-DIMM DDR2 800 (PC2 6400)

    The difference in price seems to be minimal ($5) on, but which is actually faster? #2 or #1? #2 appears to be faster, but #1 is lower in the CAS latency of 5 (in comparison to that of 6 with #2).Doesn’t a lower CAL latency translate into a faster speed?

    Also, how much of a difference does the added memory make a difference in the performance? Is it that noticeable?

    Thank you very much for your response in advance.


    Ki-tae Kim

    • kurtsh says:

      Funny you should ask about that. That’s a slightly more advanced question than I anticipated anyone asking. I actually read about this exact scenario online and it turns out that the higher speed (DDR2 800) as I understand it is somewhat important because it permits the CPU to be overclocked beyond 1.60Ghz which seems to be the upperbound limit on the memory I purchased. Others specifically reported faster speeds using faster memory up to 1.80Ghz through experimentation with the frequency setting tool I mentioned in the post. Personally, I rushed to purchase the memory upgrade simply because that’s the monster bottleneck in the T91MT. Does .2Ghz make that much of a difference to me? Not really, compared to the .37 uplift I was already getting from the new settings so I didn’t cry over the disparity.

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