This Gigabit switch proved a challenge to test. One of the limitations facing PCI is one of bandwidth. That being, it is limited to a 33MHz bus, which is 132 MB/s of available throughput. And that bus is shared. Now, not all of us are graced with wallets that can provide multiple 64-bit systems, which would allow a Gigabit network to stretch its wings. So we had to make do with the supplied 32-bit PCI 100/1,000 network cards.