Got Intel WiFi Link 1000 BGN in my laptop but I'm not getting wireless-N speeds (only 54 Mbps/wireless-G). My router is wireless-N (D-Link DIR-655) and my desktop using a Ralink RT2870 USB adapter is connecting just fine at wireless-N (270 Mbps). I tried all modes on the router for wireless-N (mixed mode bgn, mixed mode gn and n only) and nothing. Actually the WiFi Link 1000 BGN wouldn't connect at all when the router was in n only mode. In the NIC's properties I made sure "802.11n Mode" is set to Enabled and I toggled the "802.11n Channel Width for band 2.4" setting between 20 MHz only and Auto and still I only get G speeds.
The latest drivers are installed for the WiFi Link 1000 (22.214.171.124) and are 64-bit and I'm running Windows 7 Professional 64-bit.
I did a lil' searching on this forum and similar model NICs (5100/5300) have the same issue (with the same router). The fix lies in enabling WPA2/AES or enabling QoS or enabling WMM or a combination of two of these or all of them. I haven't had a chance to try any of these fixes yet though.
This information from another thread may help you.
Finally got this figured out. In case others have the same problem as I did (i.e., PC wouldn't connect at more than 54Mbps/wireless-G speeds) and want to avoid hours of frustration and deadends... To summarize what I did to get this to work
1. Have current Intel driver (on their website); Lenovo had not installed current driver on my new laptop; oh well
2. Set router to 20/40 Auto channel width, mixed n/g
3. Turn on WPA2/AES encryption
4. Enable WMM and QoS on router (QoS was already on for me, but people on Intel forum told me to check it was on so sure it must do something good)
Step 4 worked magic - went from 54Mbps to 270Mbps in a hurry. Speed fluctuates a bit it seems but still a vast improvement.