64-BIT PROCESSOR

6 reasons to buy a 64-bit processor phone in 2015:

There’s a big change happening in smartphones and tablets: more and more devices are moving to 64-bit processors such as the Tegra K1 Denver, Snapdragon 810 and Exynos 7 Octa instead of the 32-bit ones we’re used to, and super chips such as the NVIDIA Tegra X1 will make their way to Android devices too. But what are they and why should you care? Here are six reasons to buy a 64-bit processor phone in 2015.

The number refers to the number of bits that can be processed or moved around simultaneously. Think of it in terms of digits: a 16-bit processor can deal with numbers with up to 16 digits at once; a 32-bit processor up to 32 digits; and a 64-bit processor up to 64 digits. The number also applies to data and memory addresses, so where 32-bit processors can address up to 4GB of RAM 64-bit ones can potentially access billions of GB. So far, so straightforward.

1. 64-bit phones will do everything better and last longer:

THE MAJOR SMARTPHONE CHIP MAKERS ARE REALLY EXCITED ABOUT 64-BIT PROCESSOR

This is arguably the most important reason to embrace 64-bit phones. The ARMv 7 architecture that powers most 32-bit phones is good, but it’s also getting on a bit: it’s been in phones for around a decade. The newer ARMv 8 architecture is much more streamlined, more energy efficient and much, much faster when it comes to everyday tasks such as getting data from the phone’s RAM. That means everyday stuff such as user interfaces will be smoother, apps will be more responsive and gaming graphics and 4K video will be glorious.

2. 64-bit phones can handle more memory:

32-bit processors can handle up to 4GB of RAM (provided the rest of the device is up to the job), but 64-bit ones can handle more - more than you could ever hope to cram into a phone. That’s not a huge deal today but it’ll be increasingly important from this year on, because the more we do with our phones the more memory we need. If you’ve got a huge high-res UHD HDR display, lots of programs running, 4K video streaming and eleventy billion Chrome tabs open you’ll appreciate the extra headroom 64-bit phones provide.

3. 64-bit phones run your existing apps faster:

Android Lollipop is optimized for 64-bit processors, and that includes the new ART runtime that runs your apps - so even apps that the developers haven’t optimized for 64-bit processors should run more quickly. Once the developers catch up, things should improve even more.
The 32-bit Dalvik runtime is no more. Lollipop apps run in the 64-bit ART. / © ANDROIDPIT

4. 64-bit phones should be more secure:

One of the most important improvements in performance comes from anything that relies heavily on maths, such as media decoding - for example, 4K video playback - or encryption and decryption. The difference between 32-bit processing and 64-bit processing for such jobs can be enormous: in some cases algorithms that work just fine on 64-bit platforms are too slow to be used on 32-bit. If we’re going to end up using our phones as mobile wallets, we want the security algorithms to be the strongest ones possible - and for that, we need 64-bit.

  64-bit processing supports much stronger security algorithms. / © ANDROIDPIT

5. 64-bit processors will include some real screamers:

NVIDIA's Denver was the fastest ARM mobile CPU ever made. Even faster ones are coming. / © NVIDIA

Firms such as NVIDIA and ARM are working on some very, very powerful mobile processors. NVIDIA’s Denver, the first 64-bit CPU for Android, was the highest performance ARM CPU ever made - and that was just the first of a whole new generation. NVIDIA, ARM, Qualcomm and Samsung are awfully excited about the performance their 64-bit processors will be able to deliver.

6. You won’t really have a choice

By the end of 2015 it’ll be increasingly difficult to find an Android phone that isn’t packing a 64-bit processor. That applies to the lower end of the market as well as the high end: firms such as Huawei will be making their own 64-bit chips and MediaTek, whose processors power many low-end phones, is embracing 64-bit computing too.