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GLind2
Beginner
1,303 Views

Slow LAN throughput / Painful web browsing

I have a Lenovo W510 laptop including 8GB RAM, Samsung SSD, and "Intel 82577LM Gigabit Network Connection" Ethernet adapter with what I believe are the latest available drivers. This machine was recently built (with SSD) and Win7. The machine connects to a Dlink Ethernet switch, to which is also connected a NAS box and Router (with connection to the Internet).

The machine and network configuration is capable of good performance, including:

- copy large file from the NAS to desktop at > 40 MByte/sec

- download from internet speed test site at > 30Mbit/sec

But after use (of various time lengths, typically minutes to hours...), the following happens:

- copy of large file runs 6 - 10 MB/sec

- I can detect a reduced "snappiness" in File Explorer operation;

- web site browsing becomes "painful". Curiously, internet speed tests still show circa 30 Mbit/s download speed.

A restart of the computer generally rectifies the problem (for a time). At all times, the "test tools" on the Intel card report good quality network connections, good quality cable and cable lengths in the 20-30 m range (depending on connection I use) and no problems.

I have connected to the Dlink switch on various ports - makes no difference.

I have another (more power desktop) machine using a Realtek LAN card - it experiences no such difficulties and performs very well consistently.

I am stumped by this. Can anyone offer any explanation or solution?

0 Kudos
2 Replies
st4
New Contributor III
41 Views

Hi Rau 16,

Tried using latest driver and contact Lenovo as this is onboard NIC, they can have customize driver for this.

rgds,

wb

GLind2
Beginner
41 Views

I have updated to the latest driver available from Intel, and also tried the latest that Lenovo offer on their site. Neither produce any improvement. After a restart, the machine performs well, then after a little while, the problems I summarised in the original post arise.

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