For a company that
came up with NetBurst, Hub Architecture and SSE2, Performance Acceleration
Technology seems like a very tame advancement.
PAT basically works inside the memory
controller to run things a bit more efficiently. As the example above shows
(from Canterwood PowerPoint presentation), between the processor and memory
controller PAT saves the system 1 clock cycle and from the memory controller to
system memory we save another clock cycle.
While saving two memory clock cycles may
not sound like a lot, when you consider the billions of calculations that are
relayed between the processor, memory controller and system RAM, it can a
huge difference if you believe what Intel says. What is really
interesting with Canterwood is something called Communications Streaming
Architecture, which we'll deal with next...
If you're interested in learning a bit more on
i875P technology please read our AOpen AX4C Max motherboard review.
Overclocking the Asus P4C800 Deluxe:
We have not had as much luck in
the past overclocking Asus motherboards as we had with some other brands, Epox
in particular, but we did hear quite a few good things about the P4C800-DLX.
Slowly, I started to raise the FSB of the P4 3.0C
processor.... but almost immediately I ran into a few problems at around
215 MHz FSB and had to raise the CPU voltage to 1.6V to help stabilize things.
At around 223 MHz FSB we again had a few stability problems. This time, using
Asus' special overvolting option we were finally able to hit a maximum
speed of 225 MHz.
Not bad, but it's not the highest we've ever gone
The Asus BIOS:
There are quite a few memory tweaks
available with the P4C800-DLX. From CAS latency, to RAS Precharge and DRAM Burst
Length whatever you want to tweak you can in here.
Of course since I'm not a newbie at overclocking I chose to
set the AI Overclock Tuner to manual but it does allow you to overclock your
system up 30% for newbie's. You can adjust the FSB from 200-400 MHz FSB in
1 MHz increments, you can lock the AGP/PCI to specific speeds. CPU Vcore goes
as high as 1.7V, DDR voltage to 2.8V and AGP to 1.8V. Up next, the