There are three main differences between a VIA Hyperion 4in1 driver package and a VIA HyperionPro package, detailed below. All other recommendations remain.
1) The HyperionPro package includes SATA/RAID drivers whilst the Hyperion 4in1 package does not. The extra contents makes the HyperionPro package over 5MB larger than the Hyperion 4in1 package. Therefore if you are not utilizing a VIA SATA or RAID controller in your system, the Hyperion 4in1 package may be a better download choice.
2) The HyperionPro package supports 64 bit Microsoft Windows XP and 64 bit Windows Server 2003 whilst the Hyperion 4in1 package only supports 32 bit operating systems.
3) Compared with the previous Hyperion Pro driver package, version 5.00A, this version does include the IDE Filter driver, V1.20D. For Win9X/ME/2K the IDE filter driver is needed to support UDMA 6. The IDE Filter driver is not needed for WinXP SP1 and later Microsoft operating systems
Version 5.09A includes the following components:
INF V2.70B
AGP V4.50E
V-RAID V5.30C and RAID Tools v5.30
VIA Hyperion Pro drivers are suitable for ANY VIA chipset - but they are particularly recommended for KT4## series, P4X4## series and newer, for example:
Note:
If you have problems downloading VIA HyperionPro 5.09A,
please try to stop using your download manager
and avoid right clicking on files. Also, check
your firewall settings, because some mirrors may
require that you do not block the HTTP
referrers.
Note:
If you have problems downloading VIA HyperionPro 5.09A,
please try to stop using your download manager
and avoid right clicking on files. Also, check
your firewall settings, because some mirrors may
require that you do not block the HTTP
referrers. 
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