Asus P4S800D-E (SiS 655TX) Motherboard Review
Overclocking and stability
The P4S800D-E uses a 3-channel power scheme with seven 1500 mkF and four 1200 mkF capacitors installed.
Now on to the overclocking functions.
First, the FSB is adjustable within 100 to 300 MHz in 1 MHz increments.
The next important option is varying the processor voltage (Vcore); the adjustment range is within 1.35V to 1.6V in 0.0025V increments.
There is also additional 0.1V increment for the Vcore, which is somehow gathered into a separate parameter.
The next item is about raising the memory voltage (Vmem); the board allows adjusting the value within 2.55V to 2.85V in 0.1V increments.
And finally it's possible to raise the AGP voltage. Its admissible values are 1.5V and -1.8V.
Now, regarding the practical overclocking. The maximum speed the system was running stably was 225 MHz, which is a bit better than in Gigabyte 8S655TX Ultra (also built in the SiS 655TX chipset), but much worse than on the vast majority of i865PE\i875P boards.
We used a P4 Prescott with the unlocked multiplier (14-16), which provides guaranteed operation at 3.6GHz as the Vcore is raised to 1.4 - 1.425V. Besides, we used the following three memory types: PC2700 Kingston HyperX, PC3200 Corsair TwinX и Transcend PC4000 in both synchronous and asynchronous mode.
And lastly: especially for inexperienced users (or who are far from overclocking) who are anxious to boost the performance for free, programmers at Asus have implemented the "AI Overclocking" feature.
All you have to do is to select the parameters in series and check for the operational stability (it's better if that is done in complex, using various tests and games).
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