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Don't buy a new PC or Mac before you read this

Is the laptop, desktop, or tablet you plan to buy stuck with a last-gen CPU? That may be a reason to wait -- or a way to get a great deal. Here's how to tell



While summer break has just started for students across the country, that means that the all-important back-to-school shopping season is not far behind. And with it comes a flood of new or updated systems -- everything from traditional laptops and desktops to tablets and hybrids.
But before swiping your credit card on a new ultrabook, all-in-one, or convertible, you're going to want to dive a little deeper into the spec sheets. That's because the latest Intel CPU upgrade -- code named Haswell, but officially known as "fourth-generation Core i series" -- is offering significant battery life improvements in the first wave of laptops we've tested so far. So, unlike the more ho-hum Intel updates we've seen in years past, there's a real-world payoff in seeking out a Haswell-equipped laptop.
On the other hand, if battery life isn't a big concern -- if you're going for a desktop PC, or if you have a "desktop replacement" laptop that you don't tend to disconnect from the power cord -- you could score a nice discount on the many pre-Haswell PCs that will inevitably make their way to the discount bin.
How do you tell which is which? That's the tricky part.



While summer break has just started for students across the country, that means that the all-important back-to-school shopping season is not far behind. And with it comes a flood of new or updated systems -- everything from traditional laptops and desktops to tablets and hybrids.
But before swiping your credit card on a new ultrabook, all-in-one, or convertible, you're going to want to dive a little deeper into the spec sheets. That's because the latest Intel CPU upgrade -- code named Haswell, but officially known as "fourth-generation Core i series" -- is offering significant battery life improvements in the first wave of laptops we've tested so far. So, unlike the more ho-hum Intel updates we've seen in years past, there's a real-world payoff in seeking out a Haswell-equipped laptop.
On the other hand, if battery life isn't a big concern -- if you're going for a desktop PC, or if you have a "desktop replacement" laptop that you don't tend to disconnect from the power cord -- you could score a nice discount on the many pre-Haswell PCs that will inevitably make their way to the discount bin.
How do you tell which is which? That's the tricky part.



Need a 14-hour laptop? Get the new 13-inch MacBook Air.
Normally that wouldn't be a big deal, because any current laptop will have more than enough processing power for everyday tasks, such as Web surfing, HD video playback, social media networking, and working on basic office documents. For that reason, in years past, having the latest and greatest processors wasn't especially high on my priorities list. Frankly, the average consumer wouldn't feel much of a difference in surfing the Web on a laptop with a budget-minded Intel Core i3 versus one with a high-end Core i7.


But with only a handful of Haswell PCs (and Macs) tested so far, the battery life results from them so far has been very impressive. The Haswell-equipped PCs also offer Intel's better integrated graphics, either the HD 5000, HD 4600, or HD 4400, rather than the now-outdated Intel HD 4000 graphics found in third-gen Core i-series systems.
Case in point: the 2012 version of Apple's 13-inch MacBook Air ran for 7 hours and 27 minutes in our video playback battery drain test. The 2013 version of the 13-inch Air, with a Haswell CPU, blows that out of the water, with an astonishing 14 hours and 25 minutes on the same test. Sony's Haswell-powered Vaio Pro 13 ran for nearly 9 hours, and even the gaming-oriented Razer Blade, currently still undergoing benchmark testing in the CNET Labs, seems to have an extended running time compared with older gaming laptops, thanks to its current-gen CPU.
How to choose
The natural question this raises is: Should you hold off on buying a particular PC if it still has a third-generation Intel Core i-series processor and wait for the Haswell version? That might mean waiting for a long time indeed in some cases, potentially missing the back-to-school window. Some popular laptops, including the Lenovo Yoga line and Toshiba U series of ultrabooks, have not announced any firm plans to offer Haswell versions (though it's safe to assume they'll be popping up eventually).


Sony's Haswell-powered Vaio Duo 13.
I suggest approaching with caution, although I'm not ruling out buying a non-Haswell system altogether. Below are some guidelines that represent my current thinking on the subject; feel free to add your own suggestions and ideas in the comments section below.
Desktops and larger laptops: Buy now
Considering the modest gains in actual application performance (including the HD 5000 graphics), if you're holding off for performance reasons, don't. For a traditional desktop or all-in-one with no battery, the last-gen processor isn't a big deal. The same goes, to a lesser extent, for larger 15-inch and up laptops, which by their nature spend most of their time tethered to a desk and power outlet.



The high-end Toshiba Kirabook costs more the $1,500, but has last-gen processors.
Ultrabook-style systems: Seek out a Haswell version
Some of the best ultrathin laptops, namely the Apple MacBook Air and Sony's new Vaio Pro (both of which are available in 11- and 13-inch models), are among the first laptops to get the new Intel CPUs. Battery life on these is amazing, and I'd be hard-pressed to buy a premium ultrabook (or fauxtrabook) with shorter non-Haswell battery life. It would certainly be painful to spend more than $1,600 on a Toshiba Kirabook or Lenovo Helix and not get the latest processors (and the resulting boost in battery life).
Budget shoppers: Wait if you can, or seek out bargains if you can't
Some of our favorite reasonably priced laptops, such as the Toshiba U-series ultrabooks and Sony's relatively new Vaio Fit 14, are not available with fourth-gen Intel Core i-series CPUs yet, nor is there an estimated date for them. The new Core i3 CPUs for budget and midprice systems are the last item on Intel's priority list (the highest-end quad-core Core i7 chips came out first, followed by Core i5 versions), and more-modest battery life expectations are built into buying a sub-$800 laptop. That said, we're already seeing some good deals on pre-Haswell PCs, as retailers and manufacturers begin blowing out inventory to make room for those new Haswell models. So this summer see a lot of $800 to $900 PCs going for as little as $600. Keep an eye on those Sunday newspaper circulars and Internet deals.
Tablet/hybrids: Wait for Haswell
Tablets are designed for all-day on-the-go use, but to date, Windows models -- from the new Lenovo Yoga 11S to the Acer Aspire P3 to the Microsoft Surface Pro -- just haven't yet hit that iPad sweet spot. Well, it's time to stop compromising. Every Windows 8 device that's either a slate-style tablet or laptop/tablet hybrid could benefit from the extended battery life offered by Haswell. (That also goes for Intel's next-gen Atom CPU, dubbed Bay Trail -- also due soon.) The 14-hour battery life on the new MacBook Air proves it: it's possible to get much better battery life on tablets than we're getting now, and we should demand it. In other words, if you like the look and feel of a current Windows tablet, hold out for the Haswell version.
Bonus advice: Don't worry about Windows 8.1 or Mac OS X 10.9 Mavericks
Savvy tech shoppers know that Microsoft and Apple are both updating their operating systems before the end of the year, to Windows 8.1 and Mac OS X 10.9 Mavericks. The good news is that the Microsoft upgrade will be free (for existing Windows 8 users), and the Mac upgrade is likely to be very cheap (Apple hasn't announced pricing, but the last few Mac versions have been only $20). Any computer running the current OSes should be easily upgradeable to the forthcoming versions; there's no reason to wait for them to be released before buying.

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