Hi
I have just done a comparison on the two boards and there are not very many meaningful differences really. I have listed them below but if you want to check in detail you can go here:
http://uk.gigabyte.com/products/comparison/list.aspx?ck=2&pids=3449,3571UD3R1.Realtek ALC889 codec
2.2 x PCI Express x16 slot, running at x8
(PCIEX8_1/PCIEX8_2) (Note 3) (The PCIEX16_1, PCIEX16_2,
PCIEX8_1 and PCIEX8_2 slots conform to PCI Express 2.0
standard.)
3.2 x PCI Express x1 slots
4. Marvell 9128 chip:
1.2 x SATA 6Gb/s connectors (GSATA3_6, GSATA3_7) supporting
up to 2 SATA 6Gb/s devices
2.Support for SATA RAID 0, and RAID 1
GIGABYTE SATA2 chip:
1.1 x IDE connector supporting ATA-133/100/66/33 and up to
2 IDE devices
2.2 x SATA 3Gb/s connectors (GSATA2_8, GSATA2_9) supporting
up to 2 SATA 3Gb/s devices
3.Support for SATA RAID 0, RAID 1, and JBOD
JMicron JMB362 chip:
1.2 x eSATA 3Gb/s connectors (eSATA/USB Combo) on the back
panel sup- porting up to 2 SATA 3Gb/s devices
2.Support for SATA RAID 0, RAID 1, and JBOD
iTE IT8720 chip:
1.1 x floppy disk drive connector supporting up to 1 floppy
disk drive
Firewire header and ports
5.2 x eSATA/USB Combo connectors
USB31.Realtek ALC892 codec
2.1 x PCI Express x16 slot, running at x4 (PCIEX4_1)
3.3 x PCI Express x1 slots
4. 2 extra USB2.0 ports