PATA Speed problem of A8S-X (SiS756+965L)

[mac x86]

My PC's MotherBoard is A8S-X(SiS756 + SiS965L chipset combination : ASUS)

 

Now, Tiger 10.4.3 8F1111 Native install is applied.

 

Booting is well but file coping and Finder speed is very slow and

sound is snapped. I think the reason is PATA speed

 

I have test the speed using Xbench program, then disk test result is very low.

 

My PC spec is

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CPU : AMD Athlon64 X2 3800+

RAM : 1GB

MOBO : A8S-X ( SiS756 + SiS965L )

PATA : 60GB(maxtor : Tiger installed) + 80GB(maxtor)

SATA : 160GB (maxtor : Win XP installed -> No recognition in Tiger)

VGA : Gigabyte ATI X600pro 128bit/128MB ( CI & QE supports )

IEEE1394 : Ti Solution ( working very well )

Sound : Sky digital SoundEdge 5.1 (C-media 8738 chipset)

SCSI : 2940UW ( No recognition in Tiger )

Power : 475W

NIC : intel 8254oem ( works very well )

==========================================

 

How can I fix this problems ?

 

Please help!