I noticed this too on the Microsoft Surface Pro. I was only getting 2.5mbit down from Speedtest.net, but was able to use my full upload speed of 10mbit up.
Looking on the dd-wrt wireless status page, the TX was pegged at 5M while RX being 130M for my Surface Pro device. The only way I was able to increase it was to set Wireless Network Mode to G-only. Then both TX and RX were 54M and I was able to use my internet connection to the full extent..
I've heard some luck switching to Tomato, but haven't tried this myself yet. I also wasn't having this behavior on stock firmware (Using Cisco Valet M20 dd-wrt.v24-22118_NEWD-2_K2.6_std_nokaid_small same for 21061).
I'm also seeing this behavior on both bands of my Netgear WNDR3400 (rev1.)
I get about 400 kBps down, but much faster up. I get 2-4 MBps down on another (non WRT) n-lite router I'm using as an AP.
Oddly, the low download speeds on the 2.4GHz band are both on my local network and Internet, whereas on the 5GHz band, I can about saturate my cable modem on downloads, (over 4MBps. 37Mbps on speedtest,) but accessing stuff on my local network I'm limited to the 400ish kBps.
Other devices (like my phone) have more consistent performance.
I don't know what my bandwidth was before flashing WRT, but it was significantly faster.
Oh, and I've messed with security settings, N only, G only, A only, etc, nothing really had an effect.
Joined: 12 Mar 2008 Posts: 11 Location: California, USA
Posted: Sun Feb 16, 2014 4:49 Post subject: My findings
I'm using a Surface Pro (1st gen) and my dd-wrt page is showing 135M TX rate and 270M RX rate.
I'm connected on 5GHz (set to N-only) on a Linksys e4200(v1) with build 23320 K3.0 mega. I'm also completely up-to-date on the Surface firmware updates from Microsoft (they often include Wi-Fi fixes in there).
Hope this info helps anyone diagnose their problems! _________________ Linksys E4200v1