This page has heresay or limited information and may needs a more analytic basis
Provide a listing of motherboards and how well they are supported. If work-arounds are needed, for example, disabling ACPI, or tweaking the BIOS, that information is welcome here.
This information is based on personal experience and/or information found around the web and in mailing lists. It is not necessarily 100% accurate. Corrections are welcome.
Slightly older 64-bit PCI-X, dual xeon motherboard. Solid as a rock, no hacks needed.
Provides 2 64-bit PCI-X slots, one 32/33 PCI slot, dual Xeon processors. Recent versions work great, though some earlier versions had a hardware flaw that prevented the 3rd port of 4-port ethernet adapters to fail in slot 5. If a riser is required, make sure each of the PCI slots is independent.
Provides 2 64-bit PCI-X slots, one 32/33 PCI slot, dual Xeon processors. Placing a 2-port Intel pro/1000 NIC in slot 5 causes a hard hang on FC2 and 188.8.131.52 kernels. One person reported success with 2.4.29 after setting PCI-X busses to 100Mhz and disabling ioapic.
Single processor P-IV motherboard. Works fine except that acpi had to be disabled for the PS2 keyboard to work on kernel 184.108.40.206. In particular, one with BIOS Rev 1.1a failed. Other P8SCi boards have not had this problem so it may be only a particular revision or BIOS that exhibits this problem.
Since this motherboard has a PCI-X 133Mhz PCI bus, it can handle at least 900Mbps transmit and receive on two ports of an Intel pro/1000 NIC. The 2 built-in broadcom gigabit ports are not handled by the default Fedora Core 2 kernel, but work fine with a more up to date kernel.
For high performance risers, try those from http://www.adexelec.com (Adex Electronics) They may be more expensive than generic ones, but they are worth it!