Originally Posted by Dark_Slayer
I keep feeling that 70-80 MB/s is good enough, but sometimes it intermittently drops to 50. I also have asrock boards with Realtek LANs. Thanks for sharing your experiences
With lower-end consumer gear, you'll save yourself a major headache if you don't worry about getting close to full theoretical GigE speeds. It's not like 100/T gear, where you can throw anything together and it will run full speed right out of the gate. Many vendors are still half-assing the details and not providing quality documentation or drivers. They can usually do decent speeds in an isolated test, but don't deal well with curveballs.
If you are getting 70-80MBps with the occasional drop to 50MBps under normal conditions, I would call that good enough. If it's not, then depending on your setup, there may be a more efficient solution, such as using a dedicated link for a specific connection (like a HD capture box to a storage server) or just getting more local storage for the clients so you aren't shuffling data around so much.