I just built my system with

PQ53 asus mobo.
Q9550 quadcore processor
asus 4870 1gb ddr5
3 x 2Gb DDR3
600 watts PSU

and it keeps crashing. sometimes it will freeze sometimes the blue screen come out. and at other times it will restart itself
is it posibble because i just use 3 slot instead of four slot of ram?

can you guys help me?
thanks in advance guys...

Asus motherboards are quite well known for being picky about the RAM used per board model.

First, is the memory you are using recommended for your board?

Second, does your memory configuration match any of the recommended configurations per the mobo manual?

Yeah it is recommended Ram by Asus.

And yes, I put the first 2 Ram slot in Yellow Slot and 1 in Black slot...

How to get the windows/minidump in vista so i can attach the file to you guys at like other thread...

Read: All about Minidumps and attaching them

Still can find C:\windows\minidump....

and i refresh my page file right now....

Click on the link I provided above, then click on "Vista" link word (right at the end )

yeah i did that but i haven't get any Blue Screen.

how come i can find the Minidump?

What?

You mean "How come I cannot find the Minidump?"

Sometimes Minidumps are not created (ie sudden restart)

In this case you can check the Event Viewer for any issues
Start->Run-> Eventvwr.msc

Event filter with query "SELECT * FROM __InstanceModificationEvent WITHIN 60 WHERE TargetInstance ISA "Win32_Processor" AND TargetInstance.LoadPercentage > 99" could not be reactivated in namespace "//./root/CIMV2" because of error 0x80041003. Events cannot be delivered through this filter until the problem is corrected.

i got this.... all in the time that my windows crashed....

I found this:

Start->Run-> (elevated) CMD
and on the command prompt enter: winmgmt /resetrepository

Another similar post from Google

Delete the files in the REPOSITORY folders (..\System32\wbem) (you will have
to turn off the winmanagement service to do that) 'net stop winmgmt'

when i put 'net stop winmgmt' in the command prompt it ask me to answer yes or no....

i assume it for delete it right?

btw, i enter Y my access is denied (System error 5 has occured).

sorry i am newbie for this kind of thing...

=> How to Open / Copy / Paste to Command Prompt Windows

so i assuming there is no problem with my hardware right?

I'd say likely corrupt Repository folder (ie Software )
Anyway how did you go removing the files?

no blue screen atm...
but still freeze sometime. twice actually since i did delete the repository.....
is it possible because i installed 2 ram on the channel A and only one in channel B?

Well personally I'd say yes

Try removing the channel B 2Gig Ram card (giving you 4Gig dual Channel Ram )

if i remove it it's gonna be single channel only...

there are four slot in my mobo.
A1 2gb
A2 2gb
B1 2gb
B2 empty
so which one i have to remove?

Sorry I had to restart

Anyway, here's the answer -> No

Now pls remove the B1 (other) dual channel Ram (well trying to be anyway)

my comp start to restart itself...what's the matter?

i removed the B1 and it keep get my computer to restart itself..

read the my mobo manual and found out i have to put the memory in A2 and B2 if i want to put 2 stick only...
lets hope this is working...

Usually the colors match up, this making it easier for users to plug in the Ram

So are you saying that you now have 1 Ram card in Yellow and 1 Ram card in Black ?
That seems quite strange, are you sure the manual said to do this? (note: I haven't read your manual)