Biostar

AMD A85 chipset will support 6 HDDs for RAID 0, 4 HDDs for RAID 10, 2 HDDs for RAID 1, 3~6 HDDs for RAID 5.

Yes, A880GZ will be able to support two 8GB memory module for total 16GB size.

In BIOS, there is an option can manually select for the USB detection time during boot up. Please go to CMOS > Advanced > USB Configuration > USB transfer time-out , then set it from default 20 sec to [5sec].

Due to chipset support limitation, Intel G41 chipset motherboard will not be able to support single side 4GB memory modules. System will not boot up properly when use single side 4GB memory.

The symptom is caused by BIOS option SATA/IDE combined mode set to "Enabled".
According to AMD chipset specification, when you set SATA/IDE combined mode to "Enabled", SATA5&6 will be set to IDE mode.
You can set the option "SATA/IDE combined mode" to "Disable" for all SATA port to run with AHCI mode.

Intel P55/H55 chipset will not be able to support 8GB (double side) or 4GB (single side) size memory module.

It's due to chipset support limitation.

Intel uses DVMT (Dynamic Video Memory Technology) for on-booard graphic share memory.
It will share system's on-board memory for graphic share memory, but keep most of system memory size for usage.

Please check VGA memory size refer to Intel's FAQ.
http://www.intel.com/support/graphics/sb/CS-033984.htm

With BIOS default setting, graphic memory only use 64MB physical memory, but total DVMT memory size is 1696MB under Windows. System memory availible size is 3.88GB out of 4GB.

Currently socket 1155 motherboard with Intel B75 / H61 / H67 / H77 / P67 / Z68 / Z75 / Z77 chipset will support single side 4GB memory module.

Older socket 1156 and 775 mainboard will not be able to support it.

Due to on-board CPU limitation, A68I-350 Deluxe will not be able to support dual channel memory.

It will only support single channel memory.

Win7 64 bit will support SATA in AHCI mode.

So it will be best to change DVD ROM or DVD disk for finish the Windows installation process.