Different 2 BlueScreen ?

hi guys,
I'm new here, i have big problem bluescreen i dont know why,i test Memtestx86 it is ok

My system info
Win 7 x64
AMD Phenom(tm) II X4 965 Processor
6 Gb ram (1333 mhz)


2 bluescreen
080611-15132-01.dmp 06.08.2011 07:08:07 MEMORY_MANAGEMENT 0x0000001a
080511-16723-01.dmp 05.08.2011 23:18:15 NTFS_FILE_SYSTEM 0x00000024

Attachment 168771


and i upload 2 dmp file

Attachment 168772

and bluescreen same time kernel power error here

- <Event xmlns="Error">
- <System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />

<EventID>41</EventID>

<Version>2</Version>

<Level>1</Level>

<Task>63</Task>

<Opcode>0</Opcode>

<Keywords>0x8000000000000002</Keywords>

<TimeCreated SystemTime="2011-08-06T06:16:10.114411600Z" />

<EventRecordID>2298</EventRecordID>

<Correlation />

<Execution ProcessID="4" ThreadID="8" />

<Channel>System</Channel>

<Computer>anapc</Computer>

<Security UserID="S-1-5-18" />

</System>


- <EventData>
<Data Name="BugcheckCode">0</Data>

<Data Name="BugcheckParameter1">0x0</Data>

<Data Name="BugcheckParameter2">0x0</Data>

<Data Name="BugcheckParameter3">0x0</Data>

<Data Name="BugcheckParameter4">0x0</Data>

<Data Name="SleepInProgress">false</Data>

<Data Name="PowerButtonTimestamp">0</Data>

</EventData>


</Event>




pls help me