Dream Machine 2009: How To Build the Best PC For Any Budget!
6. Install the GPU Numero Uno
Now, grab one of your graphics cards. Since they’re both the same, it doesn’t matter which one. Line it up horizontally above the first x16 PCI Express slot in the system, then carefully insert it. The card should lock into place. If it doesn’t, remove the card by pressing the card release and try reinserting it. We’ve seen people install cards and somehow have the contacts on the outside of the slot, so make sure the card is properly in place. Screw the card in place with two screws. One will suffice, but you should use two if you plan to transport the machine. We’ll install the second card a bit later.
7. Slide in the Mobo
You’re now ready to slide the motherboard tray assembly into place and screw it down. Again, you can see the advantage of using a case that features a removable tray.
8. Hook up the Umbilicals
If you’re wondering why we didn’t have you install the second GPU when the tray was outside of the case, it’s because it would have blocked your access to the USB and FireWire headers. So, with easy access to the headers, carefully plug in the USB and FireWire connectors that hook up to the front of your case (image A). Generally, they are keyed so they cannot be plugged in backwards. If your case has the old-fashioned individual connectors, you’ll need to get out the motherboard manual and follow the map to plug each tiny one in place.
(image A)
Now is also a good time to plug in the front-panel eSATA connector, as well as the three loose SATA cables for the hard drive, optical drive, and SSD. These don’t have to be plugged into the drives yet, but it is easier to plug them into the board before you install the second GPU. Finally, you should hunt through your motherboard box for the quick-connect block. This lets you plug in your power and reset switch as well as the hard drive and power LED to the block, which then connects to the motherboard’s front-panel connectors (image B). You don’t have to use the block, but it makes it easier if you have to pull out the motherboard tray—you won’t have to worry about rewiring the front-panel connectors.
(image B)
9. Double the Graphics
Most modern performance boards will have multiple PCI-E slots. For SLI, however, you’ll need to use the very top long x16 PCI-E slot and the very bottom black PCI-E slot. Install the second videocard as you did the first one and screw it in place. Now grab the SLI bridge connector that should have come with your motherboard. There are two pairs of connectors on the cards—you’ll use only one for standard SLI. You can plug into either set. Simply line the bridge up over the slots and gently but firmly push the bridge in place. Voila! You’ve got SLI going now.