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Lesson 4: Installing 2nd video card for SLI mode- build a gaming PC computer

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In lesson 4 you will  find instructions on how to install the 2nd video card and get it working in Crossfire or SLI mode to build a gaming PC computer.

Updating Drivers

Once you have Windows installed you can add your second video card to enable Crossfire or SLI mode for better performance in your games.

First make sure you have the latest version of the video drivers, either from the video card's makers website, or directly from or

Getting the driver from Nvidia or AMD, directly, is usually best since you always have the most recent version. This can give you better performance and compatibility with games.


We'll begin with installing the second AMD card. This is the system from computer setup lesson three where we installed the latest Catalyst video drivers.

It's a good idea to play some games with just the one card installed, to make sure it is working properly, before adding the second card.

We'll shut down the computer so we can install the card. To watch all of our complete video lessons with full written instructions you will need to purchase a login for the site. Buy Now..

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$1200 Computer

Tech Specs
Intel Core i5 4670K 3.4GHz
8GB DDR3 Memory
1TB Hard Drive
Geforce GTX 650 Ti Video card
24X DVD Burner
Creative X-Fi Sound card
23" Widescreen Monitor
Logitech Z623 Speakers
Logitech G9x Mouse
Logitech G510 Keyboard

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$2300 Computer

Tech Specs
Intel Core i7 4930K Six Core 3.4GHz
16GB DDR3 Memory
1TB Hard Drive
128GB OCZ Vertex 4
XFX Radeon HD 7990 6GB Video cards
24X DVD Burner
Creative X-Fi Platinum Sound card
23" Widescreen Monitor
Logitech Z-5500 Speakers
Logitech G9x Mouse
Logitech G510 Keyboard

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"I just built my very first PC and I could not have done it without your tutorial.  I learned so much about what to do and not do, what to look for and what to avoid.
Your tutorial is very thorough, precise, detailed and easy to understand.
My PC is up and running very well and it is all thanks to your video. 

Check out the computer I built!
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