I just got 150 mbps cable modem service.
I have a Netgear R6300v2 router, a Motorola SB6141 cable modem, and a Netgear GS605v4 switch.
I have a Sony VAIO laptop that when hooked up to the modem directly, gets ~150mbps on speedtest.net. When it's hooked up to the router it gets ~150mbps, when hooked up to the switch it gets ~150mbps.
I have a Windows 7 PC with a Realtek PCIe GBE Family controller built into the motherboard. This PC will only get about ~50 mbps when hooked up to the same switch that the laptop gets good throughput for. Also, I have a Gateway computer running Vista that is also getting ~50 mbps when tested.
Why are the two PCs limited to that speed and what settings can I look for? I tried disabling a bunch of options in the driver for green ethernet and powersaving. And I removed Auto Negotiate and just set it to 1g full duplex.
What else am I missing that lets the Sony laptop utilize the full speed but limits the two PCs?
Update: Tried a Windows 8 Lenovo laptop connected to same switch with same cable and it's getting ~150mbps as well.
This is all with the same cord/cable as well.