SpeedGuide.net :: TCP Optimizer (2024)

SG TCP Optimizer

Details: The TCP Optimizer is a free, easy Windows program that provides an intuitive interface for tuning and optimizing your Internet connection. There is no installation required, just download and run as administrator.

The program can aid both the novice and the advanced user in tweaking related TCP/IP parameters in Windows, making it easy to tune your system to the type of Internet connection used. The tool uses advanced algorithms, and the bandwidth*delay product to find the best TCP Window for your specific connection speed. It provides for easy tuning of all related TCP/IP parameters, such as MTU, RWIN, and even advanced ones like QoS and ToS/Diffserv prioritization. The program works with all current versions of Windows, and includes additional tools, such as testing average latency over multiple hosts, and finding the largest possible packet size (MTU).

The TCP Optimizer is targeted towards broadband internet connections, however it can be helpful with tuning any internet connection type, from dialup to Gigabit+ :) It is completely free, works with most Windows versions from XP to Windows 11, requires no installation, and has been downloaded over 10 Million times over the years.

If you need help with the program, check the TCP Optimizer documentation, read our broadband tweaking articles, the Optimizer FAQ, and/or visit our Forums. The program can be freely (re)distributed, as long asyou give us proper credit as the author, and it is not sold for profit.

TCP Optimizer Download:
TCP Optimizer 4 (latest stable official SG release, works with all current Windows versions)

TCP Optimizer Download Mirrors:
SpeedGuide.net (latest version, recommended)
MajorGeeks.com
Download.com
Softpedia.com
CHIP Online (German) version 4,
GIGA Software (German)

OS: Windows 9x/ME/2K/XP/2000/Vista/7/2008/8/10/22/2012 Server/2019 Serverversion: 4.1.1date: 2021-01-08file size: 668 KB

Legacy Versions:
TCP Optimizer v. 3.08 (deprecated, supports versions up to Windows 7/2008 Server, does not support Windows 8/10/2012)
TCP Optimizer v. 2.03 (deprecated, unsupported, released 01/06/2006, supports versions up to Windows XP)
TCP Optimizer v. 1.00 (deprecated, unsupported)

Donations:
The TCP Optimizer software is completely free to use and distribute. We do not actively seek donations, however, we can accept and appreciate them. All donations will be used towards software/site development and server/colocation costs. You can donate via Paypal at , or Bitcoin at 15m4hb1fqqRh7js92qaYDQJP2YHF6jpQFS

SG Windows 7 / Vista / 2008 Misc Downloads

SG Vista TCP/IP Patch - NOT required if using the TCP Optimizer
Description: The SG Vista TCP/IP patch us a quick way to optimize Vista TCP/IP settings for broadband internet connections. It sets both netsh auto tunning levelsand modifies the Windows Registry as recommended by our Vista Tweaks article. It is recommended to run the patch when logged in withadministrative priviledges. The patch allows for reverting all settings to their respective Windows default values as well. Note you may have to right-click the link above and choose "Save Target As..." to save to your computer. To apply, save to your desktop and run as administrator (right-click -> run as administrator). Type Y when prompted to optimize parameters.
OS: Windows Vista 32/64, Server 2008| version: 1.5| date: 01/24/2010| filesize: 4.86KB

ReadyDriver Plus v 1.2
Description: The ReadyDriver Plus software allows for using unsigned drivers with Vista x64. This version works on both Vista x86 and x64 platforms. The developer, Uhlik, and SpeedGuide.netare not responsible in whole or in part for any problems that may incur from using ReadyDriver Plus. This software is also available for download directly from Uhlik, as well as Citadel Industries.
OS: Windows Vista 32/64| version: 1.2| date: 12/01/2009| filesize: 518KB

sg_vista_tcpip_limit_patch.zip
Description: This registry patch changes the limit of half-open TCP connections to 500 (from the default 2-25). Note that this should only be needed pre-Service Pack 2, and a patched tcpip.sys versionis necessary to utilize this tweak, as outlined in our Vista tcpip.sys connection limit article.
OS: Windows Vista 32-bit/64-bit| version: 1.0| date: 07/08/2008| filesize: 1KB

Older Windows 9x Registry Patches

We've added the optimal Registry settings for Cable Modems, DSL or any similar broadband Internet connection to the Registry patches below. Note that if you're using the TCP Optimizer program, there is no need to apply any of those registry patches, as they modify the same parameters. You should really experiment with different settings and add them manually or using our TCP Optimizer program above rather than applying generic patches, however we've added them for simplicity, ease of installation and the many requests. Please make sure you download the patch for your version of Windows, they are slightly different. If you'd rather try editing the Registry yourself, check the Registry Tweaks section of the site, or use our TCP Optimizer program.
Note: All patches are compressed and downloadable in "zip" format. You might need an utility, such as WinZip or WinRAR to uncompress the downloaded files before installation.

sguide_tweak_9x.zip
Description: Generic Registry patch for Windows 95/98/98SE/ME (includes a fix for 98SE ICS, as well ascorrected SackOpts location). This is an updated version of our original regstry patch, it's an .inf file thattweaks the Registry and adds all the optimum settings for Cable modem, DSL, or any similar broadband connection.To install, extract the file first, then just right-click (on the .inf filename) and choose "Install" from thePull-down menu. You need to reboot for changes to take effect.
OS: Windows 9x/ME| version: 1.0| date: 11/23/00| filesize: 1KB

sguide_tweak_9x_pppoe.zip
Description: Generic Registry patch for Windows 95/98/98SE/ME and DSL connection using PPPoE. (includes a fix for 98SE ICS, as well as smaller MaxMTU, corrected for PPPoE)This is an updated version of our original regstry patch, it's an .inf file that tweaks the Registry and adds allthe optimum settings for Internet connecions using PPPoE. To install, extract the file first, then just right-click (on the .inf filename) and choose "Install" from thePull-down menu. You need to reboot for changes to take effect. The PPPoE patch generally applies only to some xDSL connecions, it is not for use with Cable modems. For additional info on PPPoE check out our Terms & Definitions page.
OS: Windows 9x/ME| version: 1.0| date: 11/23/00| filesize: 1 KB

sguide_default_9x.zip
Description: A patch that returns all TCP/IP related Registry entries to the Windows default state. You can use it with Windows 9x/ME.To install, extract the file first, then right-click (on the .inf filename) and choose "Install" from the Pull-down menu. You need to reboot for changes to take effect. If you don't like the changes all the other patches make, or in case they have negative effect on your throughput, either restore the Windows registry to it's previous state, or use this patch to return to the default Windows TCP/IP entries.
OS: Windows 9x/ME| version: 1.0| date: 11/23/00| filesize: 1 KB

sguide_tweak_2k.zip
Description: Generic patch for Windows XP and Windows 2000 (all versions). This patch will optimizeyour TCP/IP Registry settings for high speed Internet connections. To install, extractthe .inf file first, then double-click (or right-click on filename and choose install fromthe pull-down menu) and reboot for changes to take effect.
OS: Windows 2K/XP/2k3| version: 1.0| date: 12/18/01| filesize: 1 KB

sguide_tweak_2k_pppoe.zip
Description: Generic patch for Windows XP/2000 and DSL connections using PPPoE. This patch will optimize your TCP/IP Registry settings for high speed Internet connections. It is specifically designed for PPPoE DSL connections. To install, extract the .inf file first, then double-click (or right-click on filename and choose install from the pull-down menu) and reboot for changes to take effect.
OS: Windows 2K/XP/2k3| version: 1.0| date: 12/18/01| filesize: 1 KB

sguide_default_2k.zip
Description: Patch that reverts the Windows XP / 2000 Registry to its default state regarding TCP/IP, deleting all tweaks.To install, extract the .inf file first, then double-click (or right-click on filename and choose install from the pull-down menu) and reboot for changes to take effect.
OS: Windows 2K/XP/2k3| version: 1.0| date: 12/18/01| filesize: 1 KB

winxp_dnscache.zip
Description: Patch Windows 2k/XP not to cache failed DNS entries. By default, when a DNS lookup fails (due to temporary DNS problems), Windows still caches the unsuccessful DNS query,and in turn fails to connect to a host regardless of the fact that the DNS server might be able to handleyour lookup seconds later. This patch fixes the problem by configuring the DNS client to continue sending queries to an unresponsive network.To install, save to your HD, unzip the .reg file, then double-click the filename.
OS: Windows 2K/XP/2k3| version: 1.0| date: 05/14/01| filesize: 0.5 KB

winxp_dnscache_undo.zip
Description: Patch to reverse all changes made by winxp_dnscache.reg. To install, save to your HD, unzip the .inf file, then right-click on the filename and choose "install" from the pull-down menu. Note: don't open the file, just right-click on the .inf filename and choose "install".
OS: Windows 2K/XP/2k3| version: 1.0| date: 05/14/01| filesize: 2 KB

Web Patches - faster loading of Web Pages

The following patch increases Web page loading speed, by doubling the number of possible concurrent open connections. For example, imagine a web page has 20 images and some text - in order for your browser to get all these files, it opens 2 or 4 concurrent connections, depending on the Web server. Increasing the number of open connections allows for faster retrieving of the data. Please note that the patch sets some values outside of the HTML specs. If you decide to install it, backup your Registry first. Changes will take effect after you reboot. Download the patch appropriate for your OS:

sg_webtweak_9x.zip
Description: SpeedGuide Web Patch for Windows 95/98/98SE/ME
OS: Windows 9x/ME| version: 1.0| date: 12/18/01| filesize: 1 KB

sg_webtweak_2k.zip
Description: SpeedGuide Web Patch for Windows 2000/XP
OS: Windows 2K/XP/2k3| version: 1.0| date: 12/18/01| filesize: 1.5 KB