Tweaking RWIN (TCP receive window)
Open Dr. TCP and tab to the TCP receive window section. Type the corresponding RWIN matching your download speed in the TCP receive window box and press apply, exit, and re-boot. Remember that the RWIN is the single most important tweak setting that will make a difference. An RWIN limits the amount of bandwidth sent to a user in the downstream direction. Rwin sizes:
1.5mbps: About 22000
1.0mbps: About 11000
768kbps: About 10000
512kbps: About 8000
384kbps: About 6000
256kbps: About 4000
Of course you may want to experiment with different rwin sizes to see what difference in makes! Now, go do a speed test and you may see a big or small increase in download speed!!!
Tweaking TTL (Time to Live)
Every packet you send has an TTL attached to it that makes it expire after a certain number of hops, such as 64. Windows 98 has a 128 TTL default. People wonder if a lower TTL can improve connection stability. The answer is hard to tell. It may help, but I doubt you will notice any difference. However, there are a certain things you may want to know. How to change TTL? Open Dr. TCP and look for it on the top right!
1) If you are surfing a lot of websites that are VERY far away from you (international), then you may want to try an TTL of 255 if some websites won't load for you.
2) If you are surfing a lot of websites that are national (In the US), then you may want to try an TTL of 128 or 64. Try to not use 32 since the Internet is international and not a network designed for your town. ;)
Tweaking Max Duplicate Acks
This setting gives you the option to set the maximum number of packets that should be resent if a packet is dropped. Microsoft tried to achieve an optimal number for Windows 98, which is 3 by default installation, and 2 for Windows 2000. You may want to try 2 if you do NOT experience packet loss in audio or video streams on the Internet, AND Internet games.
Tweaking Windows Scaling
Scaling is needed to enter any RWIN number higher than 65535. However, you must also have the updated vtcp.386 patch (WinME/2K does not need a patch). Relax though, most users do not need to go higher than 65535. Windows Scaling defaults to off (No).
Tweaking Time Stamping (Attention satellite users)
The need for this seems to be in question, at least with RWIN under 65535. If you have a line where your latency (or ping) varies a lot, or a "long fat pipe" (for example, pure satellite connection), then Time stamping should be beneficial, so give time stamping a try. Time Stamping defaults to off (No).
Tweaking Selective ACKS
This improves throughput (speed) on lines that tend to lose packets, by re-transmitting only packets that were lost, if any. Defaults to on (Yes) in Win98/98SE/ME/2K and is N/A in Win95/NT (sorry Windows 95 and NT users, time to upgrade!). ;)
Tweaking Path MTU Discovery
This automatically sets your MTU (maximum transmission unit) to what type of line you have (dial-up (576), broadband). This is the size of packets that you can receive. The highest MTU that one can have is 1500. For users with PPPoe connection software, 1492 and lower. Defaults to on (Yes)in Win98/98SE/ME/2K/NT, and is N/A in Win95.
Tweaking Black Hole Detection
This discovers routers on the WEB that cause MTU Discovery to work sub-optimally. Do not turn this on! Turn it off. Defaults to off (No) in Win95/98/98SE/ME/2K.
Tweaking ICS (Internet Connection Sharing)
This option is enabled only if you are sharing your connection with another computer. ICS is a program used by some who do not have a router. This is where 2 or more PCs share the same Internet connection, though only one can "surf" at a time. ICS MTU should match that of the PC. This is grayed out if ICS is not being used.
Now that you are done, go ahead and reboot! Enjoy the new speeds!!! ICQ me at if you would like to know also how to speed up your browsing speed in Internet Explorer. I hope you enjoyed this guide and will come back for more. Till then, make sure you break before every turn!
PRICING: You can find products similar to this one for sale below.
United States: Find other tech and computer products like this over at Amazon's website.
United Kingdom: Find other tech and computer products like this over at Amazon UK's website.
Canada: Find other tech and computer products like this over at Amazon Canada's website.
- We at TweakTown openly invite the companies who provide us with review samples / who are mentioned or discussed to express their opinion of our content. If any company representative wishes to respond, we will publish the response here.
Latest News Posts
- ONRUSH gameplay trailer reveals new game modes
- YouTube star John 'TotalBiscuit' Bain has died age 33
- God of War reaches a massive 5 million units sold
- The Wolf Among Us Season Two hit with 2019 delay
- Nintendo's '2nd Unit Set' for the Switch is dockless, $230
- the best value, budget upgrade for me
- best value budget upgrade path
- Buy 3 Pieces Samsung Galaxy S9 SM-G960UZKAXAA 128GB $1.422
- X58a-ud5 rev 1.0 Bios with VT-d support
- HyperX FURY DDR4-3466 16GB Dual-Channel Memory Kit Review
- Micron Launches Industry's First Enterprise SATA Solid State Drives Built on Leading 64-layer 3D NAND Technology
- Micron, Rambus, Northwest Logic and Avery Design to Deliver a Comprehensive GDDR6 Solution for Next-Generation Applications
- Toshiba Memory America Unveils UFS Devices Utilizing 64-Layer, 3D Flash Memory
- ASUS Announces GeForce GTX 1070 Ti Series Gaming Graphics Cards
- ASUS Announces ASUS Hangouts Meet Hardware Kit