ASUS P5K Deluxe WiFi (Intel P35)
Overclocking and stability
Prior to moving to overclocking, let's look into the power
converter. It uses a 8-phase(!) power scheme, in which there is one 271
mkF and eleven 561 mkF capacitors.
Now on to the overclocking features.
First off, ASUS P5K allows adjusting the system bus speed
within 200 to 800 MHz in 1 MHz increments.
Of convenience is that you can enter the desired FSB value
from the keyboard.
Secondly, a features for adjusting the multiplier, which was
always there on previous ASUS motherboards in the parameters section,
has been added.
Thirdly, ASUS P5K allows adjusting the Vcore voltage within
very wide ranges: within 1.1 V to 1.7 V in 0.0125 V increments.
Besides, the user get the features adjusting the "CPU Voltage
Reference" and "CPU PLL Voltage".
as well as the "CPU Voltage Damper".
The advanced user can raise the Vmem from the nominal 1.8V to
2.55V (in 0.05V increments).
Besides, we get a useful feature for raising the chipset
voltage on both the north bridge (from 1.25 V to 1.7V in 0.15V
increments),
and on the south bridge.
The available values are 1.057 V and 1.215 V. Besides, it is
possible to raise voltage on the FSB within 1.2 V to 1.5 V in 0.1 V
increments:
There is another parameter that allows adjusting the supply
voltage of the north bridge. This is the "North Bridge Voltage
Reference":
It is also possible to adjust the PCI Express bus speed within
100 MHz to 150 MHz.
Now let's try the overclocking features in practice. To start
with, ASUS P5K showed fantastic results: a stable operation at FSB=516
MHz with a Conroe processor.
Apart from the listed parameters, the BIOS offers two
undocumented features like "Transaction Booster":
and "Clock Over-Charging Mode":
The maximum what we were able to find out: the "Transaction
Booster" changes some secondary latency timings.
A few words on the NOS (Non-Delay Overclocking System) mode in
which overclocking is done on-demand. Simply put, the raise of FSB
speed occurs at the time a resource-hungry application (e.g., a game)
starts up. On closing the application, the system reverts to the rated
frequency.
The selection of overclocking extent is adjustable with the
"Turbo NOS" feature:
It allows overclocking the system with AI Suite which includes
tools for overclocking, monitoring, AI Gear, and AI Nap:
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