Windows 7 64 bit rwin low

Brut · Post by **Brut** » Tue Nov 23, 2010 10:41 am

Hi all first time post here and I hope you can help me

My connection is adsl 6mb and my os is win 7 64 bit (latest drivers).
I have set the Optimal settings with tcp opt. (administrator) , reboot ecc..but my rwin seems too low.

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.23.2010 10:31
IP address: 93.40.xx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030801010402
MSS: 1460
MTU: 1500
TCP Window: 17408 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 68
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 696kbps (87KBytes/s)
BDP limit (500ms): 279kbps (35KBytes/s)
MTU Discovery: ON
TTL: 38
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Pinging [68.67.73.20] with 32 bytes ->bytes=32 time=156ms TTL=50
Pinging [68.67.73.20] with 32 bytes ->bytes=32 time=162ms TTL=50
Pinging [68.67.73.20] with 32 bytes ->bytes=32 time=161ms TTL=50
Pinging [193.10.252.19] with 32 bytes ->bytes=32 time=93ms TTL=243
Pinging [193.10.252.19] with 32 bytes ->bytes=32 time=94ms TTL=243
Pinging [193.10.252.19] with 32 bytes ->bytes=32 time=93ms TTL=243
Pinging [169.232.33.224] with 32 bytes ->bytes=32 time=227ms TTL=44
Pinging [169.232.33.224] with 32 bytes ->bytes=32 time=227ms TTL=44
Pinging [169.232.33.224] with 32 bytes ->bytes=32 time=228ms TTL=44
Pinging [74.125.232.112] with 32 bytes ->bytes=32 time=31ms TTL=54
Pinging [74.125.232.112] with 32 bytes ->bytes=32 time=31ms TTL=54
Pinging [74.125.232.112] with 32 bytes ->bytes=32 time=31ms TTL=54
Pinging [64.62.162.20] with 32 bytes ->bytes=32 time=192ms TTL=114
Pinging [64.62.162.20] with 32 bytes ->bytes=32 time=191ms TTL=114
Pinging [64.62.162.20] with 32 bytes ->bytes=32 time=202ms TTL=114
Ping statistics for above hosts:
Packets: Sent = 15, Received = 15, Lost = 0 (0% loss)
Approximate round trip times (RTT) in milli-seconds:
Minimum = 31ms, Maximum = 228ms, Average = 141ms

Any suggestion pls?

Thanks and sorry for my english

Rocky_Grim · Post by **Rocky_Grim** » Tue Nov 23, 2010 12:38 pm

Windows 7 autotuning factors in your latency when it produces a optimal RWIN value. It is normal to see small RWIN sizes on a low latency connection. In this paticular case you need to run TCP Optimizer again. For whatever the reason the optimal settings were not applied. Please run TCP Optimizer with optimal setting, click apply, and reboot. Then, post your new TCP Analyzer results. RWIN Scaling should look like this RWIN Scaling: 2 bits (2^2=4) when the tweak is properly applied. Please run a tracert to google.com and provide those results as well.

Brut · Post by **Brut** » Tue Nov 23, 2010 1:09 pm

Thanks Rocky_Grim

I have done as you said but the results is the same (except for TTL 38 and now 37)

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.23.2010 13:02
IP address: 93.40.xx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030801010402
MSS: 1460
MTU: 1500
TCP Window: 17408 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 68
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 696kbps (87KBytes/s)
BDP limit (500ms): 279kbps (35KBytes/s)
MTU Discovery: ON
TTL: 37
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Now the question is why the optimal settings were not applied?

Tracert to google.com :

Pinging [74.125.232.115] with 32 bytes ->
1 23ms 23ms 22ms 10.65.148.1
2 22ms 22ms 22ms 10.1.210.50
3 22ms 22ms 22ms 10.1.144.37
4 22ms 22ms 22ms 10.1.128.133
5 22ms 23ms 22ms 10.254.1.53
6 22ms 23ms 23ms 10.254.11.193
7 23ms 22ms 22ms 89.97.200.62
8 23ms 23ms 22ms 26.26.127.70
9 23ms 23ms 22ms 93.55.251.182
10 22ms 23ms 22ms 26.26.127.77
11 36ms 32ms 32ms 89.97.200.254
12 32ms 33ms 32ms 89.96.200.134
13 32ms 32ms 32ms 72.14.198.149
14 33ms 33ms 33ms 209.85.249.54
15 33ms 34ms 33ms 72.14.232.63
16 33ms 33ms 33ms 74.125.232.115
Traceroute complete: Destination is 16 hops away

Thanks again^

Rocky_Grim · Post by **Rocky_Grim** » Tue Nov 23, 2010 2:50 pm

Right click TCP Optimizer, run as admin, and reapply settings.

Brut · Post by **Brut** » Tue Nov 23, 2010 3:23 pm

I've done this from the first time

maybe some bug?

Rocky_Grim · Post by **Rocky_Grim** » Tue Nov 23, 2010 9:04 pm

Do you have any other tweaking programs on your computer?

Brut · Post by **Brut** » Wed Nov 24, 2010 8:26 am

I use only Tcp Opt. How can i resolve?

If you need some more information tell me where I can check.

Rocky_Grim · Post by **Rocky_Grim** » Wed Nov 24, 2010 12:46 pm

Go to this website http://windows7themes.net/winsock-fix-f ... ows-7.html fallow the directions to reset winsock. Then, reboot your computer. Finally reapply the optimal settings from TCP Optimizer.

Brut · Post by **Brut** » Wed Nov 24, 2010 2:10 pm

Same

(exept for TTL)

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.24.2010 14:06
IP address: 93.40.xxx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030801010402
MSS: 1460
MTU: 1500
TCP Window: 17408 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 68
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 696kbps (87KBytes/s)
BDP limit (500ms): 279kbps (35KBytes/s)
MTU Discovery: ON
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

(2 months ago I've used FasterPing if I can help you) - I remember this just now

-

Thanks for your time

Brut · Post by **Brut** » Wed Nov 24, 2010 2:28 pm

I try to shootdown win7 and...

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.24.2010 14:26
IP address: 93.40.xxx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 17520 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 4380
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 701kbps (88KBytes/s)
BDP limit (500ms): 280kbps (35KBytes/s)
MTU Discovery: ON
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

You think is correct now?

Rocky_Grim · Post by **Rocky_Grim** » Wed Nov 24, 2010 2:33 pm

Yes this looks better. Also from what I have just read about Fast Ping it is for XP only.

Brut · Post by **Brut** » Wed Nov 24, 2010 5:06 pm

..inceredible..I'have done another time the test...How is possible?

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.24.2010 17:03
IP address: 93.40.xxx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030801010402
MSS: 1460
MTU: 1500
TCP Window: 17408 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 68
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 696kbps (87KBytes/s)
BDP limit (500ms): 279kbps (35KBytes/s)
MTU Discovery: ON
TTL: 42
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Yes this looks better. Also from what I have just read about Fast Ping it is for XP only.

It's true but the winsock fix should have to reset this right?

It's possible that all these problems are because it's 64 bit os?

Rocky_Grim · Post by **Rocky_Grim** » Wed Nov 24, 2010 6:04 pm

This is weird now it is reporting this again. Is that FastPing a program that can be uninstalled?

Brut · Post by **Brut** » Wed Nov 24, 2010 6:26 pm

Nope it's only an executable

It only aplly the fix for Tcp Ack Freq. and Nagle Alg. (that I do now manually from regedit)

Rocky_Grim · Post by **Rocky_Grim** » Wed Nov 24, 2010 6:40 pm

Okay... Well the most important thing is how are your speeds? Try running a speed test at speedtest.net to a place close to you. Lets make sure your speeds are good. I will look into this some more in the mean time. There is another post with a problem similar to yours. I am looking into it as well. I will let you know what else to try when I find something out. I am gonna reach out to some other people and see what they think.

Brut · Post by **Brut** » Wed Nov 24, 2010 6:52 pm

Thanks Rocky I'll wait for your help

My speed test with Firefox

With Chrome

Rocky_Grim · Post by **Rocky_Grim** » Thu Nov 25, 2010 11:45 am

Your speed tests look very good. Your paying for 6mb and getting 5.5mb - 6mb. After talking to Philip he told me that the results of TCP Analyzer can change with each test due to auto-tuning. RWIN Scaling doesn't have to be 2^2=4. If I hear anything more about it I will let you know. If you have any questions feel free to ask. Thanks for your time and patience.

Brut · Post by **Brut** » Thu Nov 25, 2010 1:31 pm

Thanks for your time and patience

Thanks Rocky!