My first test is with a low powered motherboard.
Runs pretty quick for XP SP3. Seems to be designed for being a CarPC. Video - Audio are quick. I like the additional PCMCIA amd CF memory options for additional media.

Processor
Model : VIA Samuel 2
Speed : 600MHz
Performance Rating : PR540 (estimated)
Type : Standard
L2 On-board Cache : 64kB Synchronous, Write-Back, 4-way set, 32 byte line size

Mainboard
Bus(es) : ISA AGP PCI CardBus USB FireWire/1394 i2c/SMBus
MP Support : No
MP APIC : No
System BIOS : Award Software International, Inc. 6.00 PG
System : VIA Technologies, Inc. CLE266-8235
Mainboard : EPIA-M
Total Memory : 992MB DDR-SDRAM

Chipset 1
Model : VIA Technologies Inc VT8623 Apollo CLE266 CastleRock CPU to PCI Bridge
Front Side Bus Speed : 1x 133MHz (133MHz data rate)
Total Memory : 1GB DDR-SDRAM
Shared Memory : 32MB
Memory Bus Speed : 2x 133MHz (266MHz data rate)

Video System
Monitor/Panel : Digital Flat Panel (800x600)
Monitor/Panel : Generic Television
Monitor/Panel : Plug and Play Monitor
Adapter : VIA/S3G CLE266

Physical Storage Devices
Hard Disk : WDC WD800VE-00KWT0 (75GB)
CD-ROM/DVD : TOSHIBA CDW/DVD SDR2612C (CD 24X Rd, 24X Wr) (DVD 3X Rd)

MultiMedia Device(s)
Device : VIA AC'97 Enhanced Audio Controller (WDM)

Power Management
AC Line Status : On-Line

Operating System(s)
Windows System : Microsoft Windows XP/2002 Professional (Win32 x86) 5.01.2600 (Service Pack 3)

Network Services
Adapter : VIA Rhine II Fast Ethernet Adapter

Tested some new software called CarMedia - It is a basic no frills interface similar to CarX. One of the features was a plug n play IBUS module. The application found the IBUS interface and provided the choices for use (AUX, CD Changer, tape, etc). Once configured for AUX worked and very similar to CarX but without the video media player.

Because of the size of the VROOMII case I will not be able to fit it inside and below the NAV/Sirius unit. I ordered a second cover which I was going to modify with quick disconnects so that the CarPC could be installed on it with reinforced brackets. I found an Ignition on only power feed (which I am using for the Video GNET interface) and only have to feed power directly (fused of course) from the battery. Another feasible location is under the floor cover adjacent to the battery. This would present an issue though of lack of ventilation.

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E83 - Aero PKG Mods installed: Homelink mirror. CIS-IBUS video module, AUX, Rr Dr Release, stock wheels, Remote start, CarPC (Atom) & mud flaps - NAV - MKIV - NA Map DVD - 2011
E46 - 18.5 wheels/tires (summer), 17 stock (winter), Homelink, NAV software upgrade, BMW video module, Radio to V53, AUX, USB IBUS interface,BMW alarm install, CarPC(Epia), remote starter, tank battery & angel eyes. NAV - MKIII - NA Map CD - High Version 2008.1