I don't know to much about ubuntu, except I tried it and I think it sux. SuSE Linux Is 10 times better to me and a little easier tto use and learn. I'm running SuSE Linux on a Triple boot system with WinXP Pro and WinXP Pro x64.
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My Specs:
Intel Pentium 4 x64 /w HT 3.00 GHz
ASUS P5S800-VM Motherboard
2x Kingston 512 MB DDR Memory
250 Watt PSU
ATI All In Wonder 9800 PRO 128 MB
Maxtor 160 GB SATA II HDD
LG 52x CD R/RW
LG 16x Dual Layer DVD R/RW/RAM
Logitech X-530 5.1 Surround Sound
Canon i550 Printer
17" Compaq Monitor
Thermaltake Swing VB6000B Case w/ window