Just joined the site and loving the content!
I'm working through the CompTIA A+ course, currently on the expansion cards episode.
Is it right in thinking that the 'Gigabit' PCIe card shown has only PCIe x1? If so is the card going to throttle the data throughput to 250mbs from the 1gbps lan connection or have I messed up somewhere? I just found this strange and I can't seem to find an answer online, however there are PCIe x4 Gigabit LAN cards?
CompTIA A+ Expansion cards: PCIe x1 and Gigabit Ethernet
You're correct. In one sense, as data comes in the the network, the NIC can receive at 1Gbps. The PCIe x1 @ 250Mbps accessing other devices internally on that PC @ 250 Mbps. So it is throttled, if the card is just a x1 card it is working at the max of the PCIe x1.
Ideally, we use a PCIe x4 or higher to do this, as long as the NIC is also a x4 or higher card too. If I were to put an x16 NIC into that x1 slot, it would still run @ 250Mbps.
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Ok that's great. I'd presume the thinking behind supplying PCIe x1 cards with 'Gigabit' would be to keep production and ultimately retails costs down, knowing the typical home/small office network wouldn't often push the upper bandwidth limits.
Anyway thanks for the quick response, onwards to USB...!