With the recent crop of new Apple desktop hardware - The Mac Pro, iMac and Mac Mini (all of which we reviewed in Personal Computer World) - we noted the use of Intel's older Core 2 Duo processor rather than the newer and more powerful Core i7 chip. The Mac Pro is an exception, but Apple's high end workstation doesn't use Core i7 either, as it's built around Intel's Xeon 5500 processor (which is similar, but not identical, to Core i7)

It's a certainty that Apple will upgrade its range to use Intel's newer processors at some point, but it may be the recently announced Core i5 and Core i3 that it chooses rather than Core i7.

If you haven't been following Intel's roadmaps, Core i5 will use a completely different socket to current Core i7 processors, using 1,156 pins rather than 1,366, meaning if you want to use a Core i5 processor, you need to fork out for yet another new motherboard. Intel's decision to bring another socket to the market has been met with confusion and some disappointment from those who have already invested in Core i7.

The good news is that Core i5 processors and components should be much less expensive than Core i7, but still offer high performance, partly thanks to an integrated memory controller that gives better memory performance than its predecessor.

This leaves Apple with a choice of processors for its next mainstream desktop line. We'll bet on them choosing Core i5 for the iMac, Core i3 for the Mini and sticking with Xeons in the Mac Pro, meaning LGA 1366 Core i7 processors end up never used in an Apple computer.

Of course, Apple hasn't even announced a new desktop line, and Core i5 processors aren't on the market yet, making this little more than speculation on our part. However, as long as Core i5 is relatively affordable and offers a reasonable performance boost, we'll call this an educated guess on what Apple's next move will be.