I finally laid down the bucks and got what I thought would be a really nice system and have been having no end of trouble.
The Motherboard is an ASUS P5B Deluxe (with intel 965 chipset)
2GB RAM
Intel Core 2 Duo Processor
Matrox SATA 300GB drive
nVidia e-GeForce 7300GS video (I want dual head)
dual Viewsonic vx2035wm monitors

It currently doesn't work, that I know of with:
my video card (apart from very primitively)
my lcd monitors (at all)
the sound card
My atapi cdrom/dvd burner

Installing Fedora core 5
First it wouldn't read my cd/dvd drive I finally found the
linux all-generic-ide
boot option
Then, the system wouldn't work with the LCD monitors in graphical mode. My first install was with them in text, the next night I plugged in a CRT and installed in graphical.
I tried to install the nvidia drivers
http://www.nvidia.com/object/linux_d..._1.0-9746.html
but the installer won't work if X is already up so I modified /etc/inittab to go to runlevel 3
(I can't remember if there's another way to change runlevel, except maybe shutdown)
The nvidia inataller program involves compiling against the kernel, but the kernel intalled with
yum install kernel-devel
doesn't match the kernel on the system and the installer program complains and punts
I downloaded a 2.6.20 kernel from kernel.org
make menuconfig
make clean all modules_install install
and the system hangs during boot.

The first two errors happen even if the system does boot
PCI:BIOS BUG MCFG area e700000 is not E 820 reserved
PCI not using mmconfig

Then I get a bunch of others
PCI cannot allocate resource region 2 of device 000:03:00.0
PCI cannot allocate resource region 3 of device 000:03:00.0
RedHat nash version 5.0.32 starting
mount could not find filesystem /dev/root
setup root: moving /dev failed: no such file or directory
setup root: moving /proc ailed: no such file or directory
setup root: moving /sys ailed: no such file or directory
switch root: mount failed: No such file or direcotry
Kernel panic - not syncing: atttempted to kill init

(note this is also posted at: http://community.livejournal.com/linux/1597729.html)

some progress: I did a
make allmodconfig
and rebuilt the kernel, and it will now boot to the point of getting a prompt on the display, but it won't recognize the keyboard.
I can ssh into it though.

I am pretty new to Linux, but replying since I am running almost identical eqpt as you. P5B, Core2Duo, Samsung LCD Monitor, GeForce 7300, large SATA HD, 2MB. (2 machines) I have tried several distro's, and most, but not all, of them work fine. In particular, Ubuntu Edgy, PCLinuxOS, and SUSE 10.2 all work fine. SUSE 10.2 requires you to preload the JMicron drivers, but PCLinux OS and Edgy just work. I see that you have already experienced the problem with JMicron drivers, which are not supported in the kernel itself.

You might burn a Ubuntu Edgy or PCLinuxOS CD and see if the CD will boot up as a Live CD and recognize and run your gear ok as they did with my identical equipment. I don't know about the dual monitor setup, since I just run one. I have not yet installed the nVidia specific drivers. Everything works right off the boot disk though. I tried some Fedora disks that I could not make work, but they may have not been current - were in a book I got at the local Linux User Group meeting.b

You may want to upgrade to the most recent ASUS BIOS, which is easy to do with the EZ Flash. But my system ran fine before I did this.

But if Edgy and PCLinuxOS will boot and run ok from the live CD, the problem would seem to be with the hardware recognition. Can't help at all with Fedora, sorry.

Bob