Here is a list of the extras you can use to unlock the power of your graphics card.
Older nVidia users (up to GeForce 500 series) should install nVidia’s own “System Tools” package for access to extra motherboard and GFX options (very useful for nForce motherboards).
http://www.nvidia.com/object/nvidia_system_tools.html
Find ideal settings for your nVidia card.
http://www.geforce.com/optimize/optimal-game-settings
First make sure ALL your Drivers are up-to-date, including Motherboard chipset, sound and DirectX
https://www.microsoft.com/download/details.aspx?id=8109
http://www.intel.com/p/en_US/support/idyp
Manufactures own tweak tools
Asus GPU Tweak
http://support.asus.com/download.aspx
MSI Afterburner
http://event.msi.com/vga/afterburner/download.htm
EVGA Precision
https://www.evga.com/precision/
Zotac Firestorm
http://www.zotac.com/z-zone/zotac-firestorm.html
ATI users should get RadeonPro
http://www.radeonpro.info
or ATItool
http://www.techpowerup.com/atitool/
Check the beta forum link for the newer version
Or ATI Tray (Access more options than you can believe!)
http://www.guru3d.com/article/ati-tray-tools-/
https://secure.wikimedia.org/wikipedia/ ... Tray_Tools
Or GPUTool
http://www.techpowerup.com/downloads/Tweaking/
Both nVidia and ATI users can also use RivaTuner
http://www.guru3d.com/index.php?page=rivatuner&menu=8
If you have a laptop, or a card that you cannot install new generic drivers from nVidia or ATI (only the manufactures old installers work).
Then you NEED the “Mobility Modder” or “FLEM” utility to update.
nVidia - http://www.hardwareheaven.com/nvmodtool.php
ATI - http://www.hardwareheaven.com/modtool.php
ATI – http://digitalflem.mydiscussion.net
If you don't have an nVidia or an ATI card, or even have an ancient GFX with no modern support, then do not worry I have the tool for you

PowerStrip (Actually, you should all get this one anyway)
http://entechtaiwan.com
Pre-historic GFX chips can also be configured with version v2.78 (95/98/NT/2000).
http://entechtaiwan.com/util/ps2.shtm
*3dfx, Number Nine, Cirrus Logic, Rendition, S3, and Tseng Labs.
GMABooster will unlock mobile intel chipsets to run at full desktop speed.
http://www.gmabooster.com
You can find more help at http://gma500booster.blogspot.it
Intel have 2 overclocking tools
http://www.intel.co.uk/content/www/uk/e ... ssors.html
USEFULL TWEAK TOOLS
Cacheman - You can use it for free, but the auto-optimise is disabled. It will give you a dynamic drive caching system. Access to many windows registry options. and (my personal holy grail) memorised task priority settings. The context sensitive help file in this prog will teach you more windows info than you can believe!
http://www.outertech.com
Speedfan - This totally free tool allows you to change your bus speed via software (If you get it wrong, just reboot and everything is back to normal) in increments of 1 MHz! You set a "High speed" and a "normal/low speed". You can literally over-clock your PC to within 1MHz of it's life

This does not seem to upset UT the same way as hardware based variable processor speed changes

http://www.almico.com
NOTE: severe overclocking can slow your PC instead of speeding it up!
Notebook Hardware Control (NHC)
Take complete control of your laptop/notebook.
Ideal if you lack the original OEM control software after a re-install, or just want something more flexible.
You can for example disable all the CPU speeds you don't want, and lock it to a single speed.
http://www.pbus-167.com
SpeederXP - This is an odd tool. As far as I can tell, this seems to adjust the timing of Windows instead of hardware, and can unlock insane speeds from your PC.
It may well play havoc with UT's timing, so don't push the slider all the way up. The site seems to have had a dodgy history, but I can find no issue with the actual software, and I have used it occasionally for 3 or 4 years.
http://www.speederxp.com
https://www.mywot.com/en/scorecard/speederxp.com (includes my report)
Xteq X-Setup - The mother of all tweak utillities! This prog is now totally free as the parent company closed, but it provides an unbeatable interface and framework for tweaking windows and other software. All the scripts are viewable/editable. You can even make your own (some UT specific tweaks could be easily created for example)
http://www.xteq.com
Autopatcher - Get all Micro$oft (and more

http://www.autopatcher.com
PC Decrapifier - You have a laptop full of stupid utilities supplied by the manufacturer, but don't know what you can get rid of ? Then visit this site.
http://pcdecrapifier.com
SlimWare Utilities Good alternative to PC Decrapifier. These use cloud based decision making. Also the driver updater is worth checking out.
https://www.slimwareutilities.com
jv16 PowerTools - The only registry cleaner worth downloading. I have been using this prog since its previous incarnation of "Regcleanr", way back on Win95. It is simply the best. It will do far more than just clean your registry !
http://www.macecraft.com
http://www.macecraft.com/registry_clean ... rison2010/ - comparison with 176 other products

Auslogics Disk Defrag - Excellent free and pro disc defrag utility.
http://www.auslogics.com
Defraggler and CCleaner - Excellent free disc defrag and clean-up tools
http://www.piriform.com
System Ninja - Another excellent system tweaker and remover of unwanted files. Also makers of CCEnhancer.
http://singularlabs.com/software/
NOTE:
A very common issue I find on home-made PC's that I have to fix, is a lack of "Chipset divers".
Your motherboards chipset drivers are extremely important for stability and full speed. These drivers should always be installed before your GFX and sound card drivers (The compatibility drivers installed during Windows installation will not do).
If you do not know what chipset your PC uses, then you can use PC Wizard to look inside your machine.
PC Wizard - See what is inside your PC, even if the drivers are not installed (it's like a small free SiSoft Sandra).
http://www.cpuid.com
Overclocking and tweaking downloads and info at Guru3D
http://downloads.guru3d.com/download.php?id=13
I keep this list maintained on http://yourunreal.wordpress.com/2013/05 ... k-windows/ where you will find further information on effective drive usage.