Biostar

Due to VGA card design limitation, ATI Radeon 6xxx series VGA card cannot use DVI to D-Sub converter to use D-Sub monitor.

N68 series motherboard will not support AHCI function. It's due to chipset support limitation.

However, RAID function will support properly.

Please refer the detail information from AMD website for the VGA card support list.

http://sites.amd.com/us/game/technology/Pages/crossfirex.aspx

Due to AMD AM3+ specification, two cores combined in one module. So you will only see "Compute 0" and "Compute 1"  in BIOS menu. Each of them will control two CPU cores. 

Please insert VGA cards on two white slot PEX16_1 and PEX16_2 for support SLI function.

Please press Delete key in POST screen to go to CMOS setup.

Then go to Chipset> Low MMIO Align and set to 64MB.

It will help to release some memory space for the Windows XP and system should support to 3.0G memory size.

Yes, motherboard's HDMI port will support 5.1 channel audio output.

However, please be sure to use source disk (DVD/Blue Ray), media player and HMDI audio decoder with 5.1 channel support.

Yes, on-board SPDIF will be able to support 7.1 channel audio output.

This problem can be resolve by update audio driver.

Please refer following link to download the audio driver.

https://download.biostar.com.tw/upload/Driver/Audio/VIA/HDA/v10100b.exe

Before driver installation, please remove previus version audio driver.

After reboot, then install the new driver version.

Due to motherboard design, A880GZ cannot support DVI to D-Sub converter to display analog display. A880GZ will support analog display only on D-Sub header and digital display on DVI header for the monitor support.