Yes, even defective memory or the controller can cause it.  I'm afraid it does sound 
like a motherboard change is in order.  When you are running the drives in DMA mode, 
you are essentially bypassing the CPU for the most part and loading data directly 
into memory, so CRC can be referenced without really knowing what the cause is, either 
memory/memory controller/slots/IDE controller or the drives can be at fault.  All 
I can say is good luck!!!  ;-)  If that doesn't work(motherboard change), then test/swap 
everything one at a time including all of the drives.  Sometimes that's all we can 
do, even on a test bench.







On Friday, October 12, 2007 at 5:31 pm, PCnerd wrote:

>u mean even a defective memory may cause this? cos i DO hav a defective ram slot 

>on the motherboard. Of course it's empty now, but does it still affect the system 

>as a whole?

>

>And also, the crc error only come while i attempt to install  big software. But 
miraculously, 

>I installed 5 software in a row without restarting the computer yesterday.(NFS carbon, 

>C&C3, Bioshock, MOH Aiborne and Office 2007). But after i restart the com and attempt 

>to install resident evil 4, the error comes back.

>

>I just discover another fault in my system, windows only load some of the essential 

>drivers during startup. I installed the display drivers, audio drivers umpteen times 

>because of this. The computer never startup loading both the drivers, either i hav 

>the display one and not the audio one or vice versa.

>

>Does all this faults come down to one comclusion: 

>

>Change the motherboard?

>

>

> 

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