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1. #INTEL CORE 2 DUO E4600 32 OR 64 SOFTWARE#
2. #INTEL CORE 2 DUO E4600 32 OR 64 PC#
3. #INTEL CORE 2 DUO E4600 32 OR 64 MAC#

Games are actually a great example of how multithreaded software can benefit. When a program can tap into multiple cores on a single CPU, it's called a multithreaded application. What about when you're doing just one thing at a time? That's where multithreaded applications come in. But with a quad-core chip, in which each core is almost as fast as one single-core processor, suddenly your options increase. If you tried doing those things with a fast, single-core CPU, you'd have to trade off CPU cycles, and your performance would suffer.

#INTEL CORE 2 DUO E4600 32 OR 64 PC#

So when would you ever be doing so many things at once on a computer? What about if you wanted to burn a DVD, listen to music, and edit a photo all at the same time? Another scenario we like is playing a game on your PC while someone in another room is using that same computer to stream digital media across your home network. You have to be able to tap into all of the cores to see a difference in performance, which is why dual-core and multicore CPUs really shine on multitasking tests. Thus, we have four processing cores, each running at 2.66GHz.

Both AMD and Intel knew this before the Extreme Edition chips came to market, of course, but with the quad-core Core 2 Extreme QX6700, the answer to the problem becomes much easier to understand than even with dual-core CPUs rather than make the chips faster, Intel has made them able to do more things at once. When those Pentium Extreme Edition chips started hitting 3.6GHz and higher, the cumbersome liquid-cooling hardware required to keep them from overheating became a visible, noisy reminder that heat dissipation is a major challenge for system builders. The reason in a word is heat: The faster a chip runs, the hotter it becomes. If you'll recall, both Intel and AMD have been laying the groundwork to get people away from thinking of raw megahertz as the primary indicator of processor capability.

You might not need a PC with such a pricey chip now, but our testing found that for applications and scenarios that will put it to the test, Intel's new quad-core chip will give you an absolute boost in performance. At $999, the Core 2 Extreme QX6700 will likely end up in only the most expensive of desktops, but the fact is that the multicore revolution is fully upon us. We found that with certain applications, Apple's high-end designer box is faster.

#INTEL CORE 2 DUO E4600 32 OR 64 MAC#

We suspect that professionals and forward-looking gamers will be most interested in quad-core chips, and of the pros, the digital-media editors might not want to get rid of their Mac Pro's just yet.

And if you're still stuck doing only one thing at a time on your desktop, the QX6700's promise for single-application performance is large, as well. Don't let the "Core 2" fool you (great job, Intel Product Naming department), this new chip has four physical processing cores in it that make it a multitasking beast. Welcome to quad core, by way of Intel's Core 2 Extreme QX6700. Barely wrapped your brain around dual-core processors? It only gets worse from here, folks.