New machine

[efc]

Make sure the Sempron is a 64bit cpu:
http://www.hardwaresecrets.com/article/201

I thought AMD 64bit cpu can be used in 32 bit mode? If that is the case you may be suffering from memory speed problems. Did you also upgrade the motherboard and ram? If you only pgraded the CPU then you must see if your ram is compatible with the higher bus speed sempron.

Yes egghead, the sepmpron 754 is a 64 bit processor.

You did have some good suggestions. My memory was from two manufacturers. I ordered another 512 MB stick to have a matched pair. I also ordered a sata HD. Should not have made a difference, but I will leave no stone unturned.

I won't comment any more for a few days to allow parts time to get here.

[Big Booger]

Yes egghead, the sepmpron 754 is a 64 bit processor.

You did have some good suggestions. My memory was from two manufacturers. I ordered another 512 MB stick to have a matched pair. I also ordered a sata HD. Should not have made a difference, but I will leave no stone unturned.

I won't comment any more for a few days to allow parts time to get here.

Ubuntu is suitable for both desktop and server use. The current Ubuntu release supports PC (Intel x86), 64-bit PC (AMD64), UltraSPARC T1 (Sun Fire T1000 and T2000) and PowerPC (Apple iBook and Powerbook, G4 and G5) architectures.

http://www.ubuntu.com/

64bit download:
http://ubuntu-releases.cs.umn.edu//6...ktop-amd64.iso

And this thread:
http://forums.xandros.com/viewtopic....ighlight=64bit

discusses the 64bit solution to Xandros, apart from running the server version.

[efc]

Finally, some good news to report. Received memory and HD this morning. Everything worked after the discovery that the CDRW had to be set up as "slave" and the Vlink data rate in BIOS had to be change from 8x to 4x.

XandrOS is apparently happy on the new machine.

Thanks to everyone for trying to help.