I just bought crucial M4 128 GB. Updated to 000F and installed Windows7 64 bit on it. All the updates are installed and following is what I did
1) In the bios I disable IDE prefetch.
2) In Windows I disabled prefetch and superfetch. Disabled defrag, disdable HDD shutdown
 
I did the benchmark and getting the following

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CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
                           Crystal Dew World :
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* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]

           Sequential Read :   261.002 MB/s
          Sequential Write :   174.501 MB/s
         Random Read 512KB :   226.889 MB/s
        Random Write 512KB :   175.487 MB/s
    Random Read 4KB (QD=1) :    27.379 MB/s [  6684.4 IOPS]
   Random Write 4KB (QD=1) :    74.294 MB/s [ 18138.3 IOPS]
   Random Read 4KB (QD=32) :    29.658 MB/s [  7240.8 IOPS]
  Random Write 4KB (QD=32) :    98.855 MB/s [ 24134.4 IOPS]

  Test : 1000 MB [C: 14.6% (17.4/119.1 GB)] (x5)
  Date : 2012/04/14 9:18:39
    OS : Windows 7 Home Premium Edition [6.1 Build 7600] (x64)

Is this acceptable? Why is it so low. The SSD is Crucial M4 and 128GB connected directly to mother board.
 
Any help will be appreciated