Build Your Own No-Compromises $1,500 PC
13. Install the OS
Here’s a rule when building a system: Never put the sides back on the case until everything is running smoothly. Otherwise, you’ll anger the PC building gods, who will punish you with a no-POST condition. Flip your system upright, make sure no cables are jammed in the fans, and plug the puppy in. Plug in your monitor, keyboard, and mouse and hit the power button. If you followed our instructions to the letter, your PC should boot with no problems. If nothing happens, here’s a quick checklist: Is the PSU’s power switch turned on? Is the power strip you’re plugged into turned on? Is the videocard properly seated? Is the RAM firmly inserted? How about the 24-pin main power connector and the eight-pin power connector? And, finally, are you sure you wired up the front-panel connector correctly? Perhaps you mixed up the power switch and the reset switch.
Assuming everything is working now, it’s time to configure the BIOS. You’ll need to hit F1 during boot and go into Advanced BIOS Features > Boot Sequence to change the boot order to the optical drive (image A). If you don’t see the hard drive listed by model, your SATA drive is likely either not powered or not plugged into the correct port or the data cable is loose. While you’re in the Advanced BIOS Features section, you should also disable boot sector virus protection or the BIOS will confuse your OS install as a virus. Also go into the Integrated Peripherals section and disable the HD Audio since we’re packing an X-Fi.
Drop your XP disc into the optical drive and reboot. Hit the space bar when prompted and follow the Microsoft questions to get the OS up and running. Now install your motherboard, GPU, and soundcard drivers from the discs that came with those parts. Once that’s done, it’s time to overclock.
Reboot and go back into the BIOS—MSI lets you overclock automatically through a Windows application, but we prefer the old-fashioned method. Go into the Cell Menu section. Under Adjust CPU FSB Frequency, you should see the default setting of 266MHz. Raise it by 5MHz or 10MHz increments at a time until the system becomes unstable, then gradually back it down to its maximum stable speed. To get to even higher clock speeds, you’ll also have to add more voltage to the CPU. We set our Rev G0 Q6600’s FSB at a conservative 310MHz, which gave us 2.8GHz, or a 400MHz overclock (image B). To increase voltage to the CPU, select CPU Voltage from the BIOS menu. Use the plus and minus keys to make adjustments. We set ours at 1.4 volts, which isn’t too dangerous to the health of the chip. Your overclock will also OC the RAM. If you want to keep the RAM within spec, you can change the FSB/Memory Ratio setting. We set ours to 1/1.25, which ran our DDR2 at 775MHz (image C).
Reboot and run a stress test such as Prime95 (www.mersenne.org/freesoft.htm) or 3DMark06 (www
.futuremark.com/) to determine if your overclock is stable or not.