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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.
My experience with generic NICs is similar to what you're experiencing. I either always get a motherboard with a KILLER NIC or Intel NIC and usually get the real speeds. Can you try to transfer files from your Windows 7 PC across the network to see what kind of speeds you're getting? You may also want to try and disable IPv6 to see if that helps. – kobaltz – 2013-10-04T05:22:36.827
TeraCopy shows I'm transferring files from router's attached USB drive to the Win7 local drive at 20 MB/s. And back to router at same speed. – Chris Valentine – 2013-10-04T06:26:57.540
I just realized the 20MB/s might be USB speeds. File transfered to the Win8 laptop from Win7 PC in question seemed to be about 75MB/s most of the time. – Chris Valentine – 2013-10-04T06:40:48.390