Yes, two 1 GB Ethernet NICs can be connected to a PC and work together to boost internet performance.
Yes, two 1 GB Ethernet NICs can be connected to a PC and work together to boost internet performance.
You're looking at your Ciara Desktop I7-3770 with two 1GB Ethernet cards but only one Ethernet port. Considering an Ethernet splitter could help you use both ports, but it might not be necessary if you only need one. A 2.5GB NIC would give you more bandwidth and potentially better performance for your setup.
The Ethernet splitter only divides one port into two, but both ends still connect to the same port, so speed is limited by that single port. To run two network cards, you'd need them on both sides and support features like link aggregation. A 2.5 Gbit NIC won't help much unless your ISP router offers more than 1 Gbps and you're paying for higher speeds at home.
This relies heavily on your internet connection speed. Your ISP contract should list it, or you can run a speed test on speedtest.com.