Intel nerfin 865 chipsets using PAT "like" technology

Question

You heard me Intel is pissed PAT is getting turned on by mobo makers and are doing somehting about it. better get your neo 865's now !
Article here

Answer 1

Quoted from this forums FAQ:
Quote
Q: Then what is PAT?
This is what I found in the forum, written by Assaf.
quote:
Here's what I understand about PAT.
As you may or may not know adding pipline stages to any execution unit will allow you to run it at a higher frequency but it will increase the latancy from start to end (measured in clock pulses).
Now, in order to ensure reliable operation at 800MHz FSB intel added 2 pipline stages to the memory controller (as based on the original dual memory controller in the E7205 chipset)
This they called i865PE and it will only put into action these 2 stages when 800MHz FSB is applied (which it needs the bios to tell it is the case)
Intel take the better yealdes of 865PE and validate them for 800MHz with the 2 extra stages disabled.
These they call 875P.
A 875P bios with PAT enabled simply does not "tell" the chipset it it running at 800MHz so the extra stages are inactive thus reducing latancy relative to a situation where these stages were activated.
A hacked 865PE bios will simply follow the 875P bios rule of not notifing the chipset it is running at 800MHz.
PAT is not an optimization, it's a de-un-optimization  
This is the best description yet. What it means is that if the bios is not telling the 875/865 chipset it is running at 800MHz then PAT is enabled. So people running 400 or 533 FSB are running with PAT enabled, even if not detected, since the last 2 stages won't be used.