Power, Performance, and Good Looks
"Since the advent of Intel's i865 and i875 chipsets, the two have performed similarly, with a slight advantage going to the 875 and its PAT (Performance Acceleration Technology). Soon after the release of the 865 however, motherboard manufacturers were able to implement the same technology with a simple BIOS update, showing that the i865 is merely a binned down i875 with more conservative timings. Not long after this was discovered, Intel made it clear that it was not PAT "officially" and it could not be called PAT in any way.
After the initial dust settled, we all found that the i875 with PAT and the i865 with pseudo-PAT performed on the same level, with the latter product selling for a lot less. Why then would anyone want an i875 based motherboard? Because if it isn't PAT, there is no guarantee that it will work. Where as PAT is a certified Intel technology that has been tested and qualified to work as advertised.
In our experience, both chipsets offer virtually the same performance and features. But in the end, if you want a motherboard that officially supports PAT, you'll need an i875 based board. So let's take a look at the latest of these boards to come our way, the Albatron PX875 Pro. This motherboard has the muscle to power the best processor Intel has to offer and enough overclocking features to push it to its max. Let's see what it has to offer and then we'll pit it against an i865PE board with "pseudo-PAT", other wise known as Abit's "Game Accelerator" technology and see if it is worth the extra cash."
Source :
HotHardware