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Pentium 4 Overclocking Adventure

By: Tio Chaharbaghi | Intel CPUs in CPUs, Chipsets & SoCs | Posted: Feb 17, 2003 5:00 am

Overclocking the CPU continued


Next we have an option which is called "Fixed AGP/PCI output frequency". Theoretically, when you raise your FSB, this also raises your PCI/AGP buses from their defaults of 33/66 to higher speeds depending on your FSB. A lot of the time, this can limit your overclock since your AGP/PCI cards might not be able to handle higher AGP/PCI bus frequencies. By enabling this option, you can still raise your FSB without raising your AGP/PCI bus, thus locking the AGP/PCI buses at 33/66. If you decide to keep it disabled, you can also manually use CPU: AGP ratios to find a setting where your peripherals can run at a higher bus speed but still be stable and not affect your overclock.


Continuing on, the next thing we have is DDR: CPU ratio. This controls how fast your DDR speed will be set at. Under this menu, Albatron gives you a couple of options. "2.00X", "2.50x" as well as "2.66x". To figure out the DDR speed, the motherboard simply takes what your FSB is set at and multiplies it by the number you choose in this menu. So for instance, if you are running at stock, which is 133 FSB while choosing the "2.66x" option, your DDR memory will be running at a speed of 354MHz.


AGP voltage has the same concept as your CPU voltage, also known as Vcore. You will use this feature to provide your video card with more juice to hit a higher clock on both the core MHz as well as the memory MHz. Finally we have your DDR voltage; you will also use this to provide your memory with more juice to hit higher clocks if you see it's limiting your overclock. A lot of companies that you buy ram from, indicate that you will need a certain amount of DDR voltage to hit the advertised speed.


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