Since a few days, I'm only getting maximum 2Mbps downstream over the local wi-fi. Before that, it was a lot faster. Another notebook on the same network still gets 30+Mbps. Latency (<15ms) and upstream (1Mbps, a good value for a typical connection in the region) are unaffected on both machines. Tested with connection benchmark sites and downloads in a download manager. Android phone and tablet connected to the same network both get 16+Mbps downstream.
In the Windows 8 wi-fi status dialog, it shows full five bars of connectivity and a theoretical connection speed of 130Mbps.
I'm not aware of any software on my PC that might have changed it, although I did install some system-heavy software recently (SQL Server Express, VS2013 Express Preview and similar). From the timing, the installation of those would fit to when I first noticed the speed problems.
According to the Windows 8 task manager, my network has 0% workload. When I run a speed test, this jumps up to 2Mbps (all other processes but Chrome are at 0Mbps), but there it seems to be magically limited by something and doesn't go above, even though I know the router could do at least ten times as much. I can't figure out what causes this.
I do not have control over the router because I'm staying at someone else's place, but I do know that nobody touched it (e.g. to manually set QoS rules to affect me).
What gives, any ideas?
It's such a weird problem that I don't even know which keywords to google for.
Things I've tried:
- Remove and recreate wi-fi network connection
- Remove and redetect network adapter
netsh int ip reset
- On the network adapter, remove all "items" but IPv4
- Broadcom 802.11n adapter on HM55 chipset for Core i5 CPU
- Windows 8 Pro with all updates installed
- D-Link DIR-615 router
- Connected via WPA2-Personal with AES encryption (automatically chosen by Windows, not manually modified)