I've run into the same problem, and haven't been able to find anything indicating that these cards are even supported under RHEL 4 (64 bit).
Here's what shows up in the dmesg log:
Code:
e1000: 0000:22:04.0: e1000_sw_init: Unknown MAC Type
e1000: probe of 0000:22:04.0 failed with error -5
ACPI: PCI interrupt 0000:22:04.1[B] -> GSI 34 (level, low) -> IRQ 66
e1000: 0000:22:04.1: e1000_sw_init: Unknown MAC Type
e1000: probe of 0000:22:04.1 failed with error -5
ACPI: PCI interrupt 0000:22:06.0[A] -> GSI 35 (level, low) -> IRQ 74
e1000: 0000:22:06.0: e1000_sw_init: Unknown MAC Type
e1000: probe of 0000:22:06.0 failed with error -5
ACPI: PCI interrupt 0000:22:06.1[B] -> GSI 32 (level, low) -> IRQ 217
e1000: 0000:22:06.1: e1000_sw_init: Unknown MAC Type
e1000: probe of 0000:22:06.1 failed with error -5
Can anybody confirm any sort of support for this card? drivers, patches, etc.