Increased clock speed in bios, now there is no response at all

The bus speed is set by the motherboard. Only the CPU clock speed can be adjusted in BIOS.

the prcessory varies with clock speed and the speed for example a pentium 1 processor has a spped of 100mmx with aclock speed just 66mhz now the pentium 4 processor uses a spped of 3.0 ghz with a clock speed of 800mhz so there is deferance as the clock speed increase the speed of the computer increases

Go to your BIOS settings and load the defaults or else you might mess the other settings. There is no tweaks in the BIOS side since it is pre-configured to be efficient.

Make sure that your video and audio drivers are installed and are updated. Run MS updates as well.

Also, the behavior can also be attributed to hardware speed or the internet speed. Try to check them as well.

One more thing, increase your Virtual Memory if you are using windows since this helps speed up your computer.

you have to overclock it. you can do this by bios setting.or download free software for over clocking. but don't go beyond the limit it will crash your system.

All Asus P5GC-MX/1333 mobos are "X-series" boards.  

If you put higher speed ram on that mobo, it will just run the ram at lower speeds.

The board will not take 1333 speed DDR3, because it is only DDR2 compatible.

OVerclocking is complicated and risky, here is neither the place to teach or learn overclocking.

Some newer core 2 chips will automatically overclock, when all but 1 core is in hibernation (which will never happen if you are using vista). Other than that overclocking involves setting the bios to increase the memory buss speed, as well as slightly increasing the cpu and ram voltages as needed for stability. There is a great risk associated with manually overclocking and adjusting voltages, and should not be attempted by beginners on machines they value.

Need to know the bios version normally you set the clock speed in bios so go into bios and see if it lists cpu clock speed and change it manually. However if you have american mega-trends or ami bios it makes of difference so post back if that does not help you.

Laptops generally don't operate at their rated clock speed due to heating problems caused by the CPU having very limited ventilation

Overclocking is set from the BIOS configuration. Not all BIOS allows overclocking, it may need a BIOS upgrade.
Check the ASUS WEB site for your model motherboard.
Overclocking the CPU (ie running at a higher clock speed) and increasing Frontside bus speed will give better performance BUT there is a downside too, if you overclock too high you could overheat the CPU and it could fail.

A printer is designed to print at a certain ppm (page per minute), so really there is only one way to speed it up. When you select the print option from the File menu, you can select properties and see if you can change the dpi (dots per inch) of the document. Your document will print faster but you will lose quality.

The 800 MHz seems to be your system bus speed and not the CPU speed. They a related but no quite the same. Overclocking is usually defined as forcing something to operate at a higher speed than it was designed to. If you changed the 800 MHz to 1.6 GHz in your BIOS then yes it could be considered overclocking.

One thing I would like to mention is that when changing clock speeds in your BIOS, do it in small steps, if done in large steps it can cause system instability.