OK, I got my amd64 hardware ... actually an Opteron 140 but am having some problems.
Hardware:
After much hassle I got an ASUS SK8V MB. I first ordered a Gigabyte K8NNXP-940 (looked pretty good and I had good luck with another Gigabyte MB for dual athlons). This proved to an advertised and not really available product so I switch the order to an ASUS SK8N. When I went to pick it up, I was told that the RUMOR (NOTE, this is RUMOR, not FACT) that the SK8N had been recalled and if I wanted, they had an SK8V I could have. Now, this seemed better because the VIA chipset does not apparently have the acpi problem so I got it.
The video adapter is an ATI 9100 and (as expected from other comments) the onboard NIC did not work so I added a Linksys (tulip) NIC. The system has 1GB ECC Reg ram.
I installed i386 FC1 with no (well, see below) problems so this is hardware that FC1 should handle.
Problem 1 (I do not really expect help here but who knows):
I have a Dell 2000FP (analog) monitor which is connected to a total of four systems via a Belkin KVM switch. I have had zero problems with this setup (runs 1600x1200 just fine) on my other systems (dual P-III, single P-III and dual athlon).
When I poweron the Opteron the screen blinks a couple of times, some text comes up for some IDE/raid controllers but then I get a blank screen with the Dell saying it is in power-save mode. I finally dug out an old NEC XV17+ and connected it directly. OK, it comes up and I was finally able the get into BIOS Setup via the DEL key. I turned off some fancy ASUS/AMI graphic boot stuff and otherwise configured the BIOS to be more friendly ... this resulted in being able to at least bootup on the Dell but still unable to get into BIOS Setup this way (or at least get it to display). On the Dell this BIOS Setup image flashes but then the monitor goes into power-save mode. Once I get to with the FC1 i386 cdrom prompt or (after install) the grub panel, the display works fine.
OK, the conclusion I have come to is that the ASUS/AMI BIOS is using some video adapter parameters which drives the Dell monitor nuts and forces it into "off" mode.
I can't get this system to boot the floppy (it does boot the Maxtor harddrive and the cdrom (DVD drive) but not the floppy) -- I am not sure the floppy drive is even seen. This means that I cannot update the BIOS although there is an update available.
I have not yet tried attaching the Dell monitor directly or to use the DVI interface (both the 9100 adapter and the Dell monitor have a DVI interface in addition to an analog interface). However, I do not expect this to work any better since it seems (to me) to be video parameters that the ASUS/AMI BIOS is using.
As I said, I don't expect help here but any would be appreciated.
Problem 2 (installing FC1 X86_64):
I downloaded all of the files from fedora.linux.duke.edu, burned a cdrom using images/boot.iso, and made the directory tree available via an NFS share. The nfs shared fc1 directory tree has both i386 and x86_64 subtrees and I successfully installed fc1-i386 off the i386 tree.
When I boot the x86_64 boot.iso cdrom it comes up. I enter the appropriate system name and directory tree but then get "unable to mount" popup and am unable to get any further. As I said, I used this same process to install i386 FC1 and have checked the permission and they are OK.
Another strange thing is that I cannot switch to VT2 (ctl-alt-F2) although I can switch to VT3 and VT4 ... maybe I am not far along enough for VT2 to work.
Any help appreciated.