DR. TCP Configuration Question

[bpatters69]

Hello Folks,

I have downloaded Dr. TCP to try to improve my downolad speed. Dr. TCP is simply a GUI that shows stats in the registry. The key attribute to change is something called, TWIN. Supposedly for XP the default is 17520. The readme on Dr. TCP gives me this calculation:

The formula for finding your "ideal" RWIN, is to take your latency (average ping time in ms x 1.5), multiply that by your advertised (download) speed, and divide that by 8.

I took the average latency from www.uga.edu and it came back at 131ms

So, my calculation is (I have DSL):

131ms x 1.5 = 196.5 (average ping time in ms x 1.5)

Now what? Do I take 196.5 x 1.5Mbps for my advertised download speed and divide by 8?

Here is the entire paragraph:

TCP Receive Window: This is where you set RWIN (RcvWindow). RWIN is the single most important tweak. Raising Rwin from default (8760 for Win95/98/98SE/NT and 17520 for WinME/2K/XP), can greatly improve download speeds. Why? Here is my kindergarten analogy: Default RWIN for broadband, is like having a tiny straw in a thick milk shake, only so much can get through the straw (line), so fast. By putting a larger straw (higher RWIN) in that same thick shake, you allow more shake (data) to come through faster, to a point that is. After which, there is no more improvement, and shake (data) can start spilling all over (packet loss). So the key is, to find an RWIN that fits your line just right. This is blank before changing from default.

What answer do you come up with? Is Dr. TCP any good?

Thanks, Bill

 

[bpatters69]

Anyone? Bueller? Voo Doo economics??

 

[kamper]

I'd say MS probably knows how to write a networking stack that works well enough without user intervention.

 

[JackMDS]

You can find the values on this page: Optimizing & Measuring the "Speed" of Internet Connection.

:sun:

 

[bpatters69]

Many thanks, Jack.