Timothy Murphy wrote: > So I'll ask again if anyone is happily running the x86_64 version of FC-6 > on an Athlon 64 machine? I suppose my previous answer wasn't *that* clear -- yes, my setup mirrored yours down to the 64 bit install, with a 3200 processor. I don't know if yours is one of the Socket 939 or Socket 754 variants, but that *really* shouldn't matter (mine's a Socket 939). I *do* know that I'm running on an NForce 4-based ASUS motherboard, whereas I think yours is Via-based. > OK, thanks for the responses. > Evidently the x86_64 version of FC-6 works fine, in principle. > > I also have an Asus motherboard and ATI Radeon 9600 video card, > though I only have 512MB RAM. > > What I find puzzling is that my machine works perfectly > under the i386 version of FC-6 and under Windows XP. > Under the x86_64 version it can be guaranteed to crash within 1 hour > (usually within 1 minute), even if run in text mode, > and even with a compiled vanilla kernel. Have you tried turning off ACPI? The ACPI subsystem does use a lot of stuff from the BIOS, which may well not have been debugged under a 64 bit OS. (Just a thought...) > Also, after the crash it is not sufficient to re-boot > by pressing the power switch for 10 seconds - > one has to switch the machine off and on at the back. > I take it this shows some kind of memory corruption. > > It's a Targa machine, and I looked at the www.targa.com > to see if they had upgraded the CPU or BIOS, > but they are still shipping the same versions, > so I assume there has been no general failure. If you're willing to risk it, you could always see if *Asus* have an updated BIOS. That should work on your motherboard. Or stick with the 32 bit install. Hope this helps, James. -- E-mail: james@ | Am I alone in receiving so much junk mail? Can these aprilcottage.co.uk | people not get it into their thick heads that I do not | *want* a Chinese boat? Yours sincerely, Mrs Trellis. | -- ISIHAC, BBC Radio 4