I have been using your site for many years to help me with my connections. Recently I put a Windows 7 computer in the mix wired to the router, and with a couple of a couple of tricks I learned long ago on this site, I have been getting speeds that Cox cable would be horrified to find that I'm getting (only paying for about 7Mbits/s but getting:

SG Speed Test Results

« 14881 kbps ↓

« 3688 kbps ↑


14881 kbps down (~14.88 Mbps, 1817 KB/s) ↓
3688 kbps up (~3.69 Mbps, 450 KB/s) ↑

Details:
10240 KB downloaded in 5.637 seconds
5120 KB uploaded in 11.372 seconds
Speed @ 252% of the average for lv.lv.cox.net
281 times faster than 56k dialup


I'm more than happy, especially since I have about 6 more devices consuming bandwidth simultaneously (Kindle, Roku, e-Print printer, two iPhones, and a laptop), but when I did a TCP/IP Analysis I got this:

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2012.06.21 06:27
IP address: 68.96.xxx.xx
Client OS/browser: Windows 7 (Firefox 13.0.1)

TCP options string: 020405b80103030201010402
MSS: 1464
MTU: 1504
TCP Window: 65700 (NOT multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16425
Recommended RWINs: 64416, 128832, 257664, 515328, 1030656
BDP limit (200ms): 2628kbps (329KBytes/s)
BDP limit (500ms): 1051kbps (131KBytes/s)
MTU Discovery: ON
TTL: 120
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)


I know enough to know that the RWIN value is wrong the TTL seems long and the MTU is too high, but I'm getting wonderful results. Also I'm unfamiliar with the TCP/IP Autotune function in Windows 7. Should I bother changing these values? A quick and to the point answer would be appreciated.

Thanks so much,
Troutdog