Raspberry Pi 3 vs Raspberry Pi 2 – what’s the difference?
Size and layout
Both the Raspberry Pi 2 and Pi 3 are the same size (86mmx56mmx21mm), with the mounting holes in the same place for both boards. This makes the new Pi compatible with older cases, so you should just be able to swap out an old Pi 2 for the new model. However, there’s a board layout differences that may cause problems for some people: the power and activity lights on the Pi 3 have been moved to the bottom left of the board from the top left on the Pi 2. If your Pi case shows these lights, they won’t be visible if you upgrade to a Pi 2.
The Pi 3 (left) has a slightly different board layout to the Pi 2 (right), although both are the same size
Both models have an integrated microSD card slot, but the Pi 3 has a friction slot, rather than the spring-loaded slot of the Pi 2. That’s a great decision, as Expert Reviews had a Pi 2 where the spring mechanism broke, so the microSD card had to be held in place with some electrical tape.
The big difference is that the Pi 3 now has integrated 802.11n Wi-Fi and Bluetooth. It means that you don’t need to use up one of the four USB slots and makes for a neater package overall. We’re just waiting for the updated OS to launch with Pi 3 Wi-Fi support so that we can test how good the Wi-Fi is. Assuming it’s all good, this is one change that all Pi users have wanted for a long time.
Performance and energy consumption
The Pi 2 had a 900MHz Cortex-A7 chip, but the Pi 3 has a 1.2GHz Cortex-A53. Running the Whetstone Pi A7 test, the Pi 3 scored 711 compared to the Pi 2’s 432: a 65% increase. That’s impressive and means that you’ll be able to run more complex tasks on the Pi 3. In the full Expert Reviews review, we found that the Pi 3 was quicker to render web pages in the Epiphany browser and LibreOffice ran more smoothly.
Impressively, the Pi 3 also uses less power, with the CPU able to clock down to 600MHz. This means that it uses just 2.5W when idle: a 22% power saving on the Pi 2’s 3.2W idle consumption. Both new and old Pi draw 3.8W under load, though. An upgraded video core in the Pi 3 runs at 400MHz, compared to 250MHz in the Pi 2. I’ll update this comparison once I’ve had the chance to run some graphics benchmarks.
There’s not the same kind of improvement moving from the Pi 2 to the Pi 3, as there was moving from an original Pi to a Pi 2, but that doesn’t make the Pi 3 any less impressive. With lower power consumption, a faster CPU, quicker graphics core and built-in Wi-Fi and Bluetooth, the Pi 3 is definitely the best choice for new Pi owners, particularly as it still costs the same £30. For Pi 2 owners, I suspect a lot of them will be tempted to upgrade, but the choice isn’t quite that simple: if your Pi 2’s struggling to run some tasks, the upgrade is worth it; for less demanding projects Pi 2 still remains a powerful and flexible computer and existing owners will remain happy if they don’t upgrade straight away.
We pit the Raspberry Pi 3 against the older Pi 2, so you can find out if it’s worth upgrading
Source: Software – ExpertReviews.co.uk