Introducing Raspberry Pi 4! + interview with a Raspberry Pi engineer

Introducing Raspberry Pi 4! + interview with a Raspberry Pi engineer


Hey folks, Rob here from The MagPi, the
official Raspberry PI magazine. Now today I’m here at the Raspberry Pi store in the Grand
Arcade in Cambridge for a very special occasion: the launch of the brand
spanking new Raspberry Pi 4. Welcome to the new generation of Raspberry Pi. I’m really excited to finally show you
all the Raspberry Pi 4. It’s been developed for quite a while now and
every time I was up in the office I got to hear about some of the amazing
things that were happening with it during development. Here it is though the
Raspberry Pi 4 Model B. The new system-on-a-chip is not just an improved
2835 like the last few but a brand new SoC built specifically for the Raspberry Pi 4.
Now this new generation of chips is the BCM2711 and includes a 64-bit
quad-core Cortex A72 processor that clocks at 1.5 gigahertz and includes up
to a whopping four gigabytes of RAM up from the one gigabyte on the last few flagship
models. That alone is a massive jump in power and our benchmarks show that it’s
a staggering four times faster than Raspberry Pi 3B+. It also has an upgraded graphics
processor gone is the VideoCore IV of every single past Raspberry Pi, replaced with
the brand-new VideoCore VI Now this bumps Raspberry Pi 4s video outputs to
4k which can now be done via two HDMI ports you can see here they’re two micro
HTML and they’re made to be micro HDMI so both of them can fit on the board the
other ports have also been upgraded there’s now the Gigabit Ethernet two
of the USB ports are 3.0 and the Bluetooth has been operated to 5.0 and
the wireless LAN is even more powerful With all these extra amazing features
the power port has also been upgraded to a 5V, 3A USB C port. It’s truly
a beast but don’t take my word for it Although why wouldn’t you, I’m very
trustworthy… as we have a load of benchmarks to back
this up Hello, I’m here with James Adams, the
hardware lead at Raspberry Pi Trading and we’re gonna talk about some of the
amazing benchmarks that Raspberry Pi 4 has done for us.
We’ll be showing them on the screen as we discuss them, but
the main takeaway from from this benchmark is that Raspberry Pi 4… it’s
faster it’s better it’s stronger it’s more Pi! It’s great.
More Pi, it’s more Pi for your money it’s a faster processor it’s full Gigabit Ethernet
it’s USB 3 it’s two display outputs it’s more RAM. And it’s a Raspberry Pi that
looks very much like an old Raspberry Pi. And you’re kind of aiming it…
you know one of the good things about it is that like it that… it’s a real
desktop, a full desktop PC.
Yeah so it really works very well as a sort of
comparable to a low-end x86 kind of desktop PC with the upgrades
to the I/O performance and the CPU performance you can… and the memory
running things like Chrome web browsing running Gmail, Facebook, these kind of
things all work fairly nicely on Raspberry Pi now. YouTube runs fine so yeah
it’s really got a great kind of you know PC feel now.
For some of these benchmarks
let’s start with the big one the kind of CPU test we using Linpack for this
test our figures for Raspberry Pi 3B+ is about… what does it say here – 225 million
instructions per second and our results for Raspberry Pi are about 941 million instructions
per second which is you know just shy of four times faster in these stats.
So, okay so then Linpack is a fairly synthetic benchmark. The CPU on the
new machine is it’s a more advanced core. It’s running at 1.5 gigahertz
versus 1.4 on Raspberry Pi 3B+ and that doesn’t sound like a lot but the
thing is the core is much more advanced so it can it does out of order execution
so it can actually execute per clock with many more
instructions. I mean Linpack, that’s a nice number we see
in real world in real world sort of you know say browsing it’s about two and a
half to three times faster across the board.
Which is still incredibly
impressive.
Yeah, and you couple that with more memory that you can have on
the higher tiers of the product, you know it’s it’s a great it’s a great PC.
Yeah, speaking of memory, the bandwidth has also increased significantly I
think our figures are showing a 50% at least increase in a
bandwidth there.
Yeah, so the memory is now LPDDR4, so that’s the same kind of
memory that you have in your mobile phone and it’s running at 2.4
gigahertz it has the option to boost up to 3.2 gigahertz as well for
doing 4Kp60. Yeah so it’s a doubling of memory
bandwidth.
Which is fantastic. Speaking of 4Kp60, one of the cool things about
Raspberry Pi 4 is that for the first time we’re getting an upgrade to the VideoCore from VC IV to VC VI which is the GPU part of Raspberry Pi 4 you know how
good is this new VideoCore then? So it’s an evolution of the VideoCore IV
3D engine inside the original Raspberry Pi 3
and Raspberry Pi 2 and Raspberry Pi 1.
It’s running a little bit faster in terms of clock rate but it’s got
more silicon under the hood basically they all do OpenGL ES 3 for example… OpenGL ES 2 so there’s sort of a tick box update but yeah as you can see
it’s about 2x raw performance increase over the previous generation.
Which is great I like you know even you know with all this extra power from Raspberry Pi 4 like you know we’ve got some figures on
the power draw here and it’s only like you know a small increase on when we’re
going idle and even with a bit of power draw as well… how’s that been
achieved even with such a big power increase.
Good question – so the new
processor on this board is BCM2711, it’s the new 28 nanometer processor from
Broadcom. The previous boards Eben said at Raspberry Pi 3B+, launch this
this is the last board that uses the older 40 nanometer
technology so we’ve moved down a silicon technology node that gets you more
transistors in the same area faster transistors and lower power transistors,
so we’ve been able to put you know these faster CPU cores on, and also just pay
pay attention to the power on all parts of the board. So you know we turn the
clocks down when there’s not much going on and we sort of de-power things where
we can, so we’ve managed to achieve quite a good you know similar power
consumption to Raspberry Pi 3B+ it will be a reasonable amount more when you’re
actually running flat out but but not very much.
Great, and obviously
everything else is slightly faster so USB 3.0 which gives you a
huge increase in… about ten times faster than 2.0?
Yeah about 10 times faster if
you put a fast SSD in your USB 3 and do a retest you’ll get sort of north of
350 megabytes a second.
Wow, and even the SD card is faster than before in Raspberry Pi 3B+.
Indeed, yep, so we’ve doubled the speed of the SD card as well so that
will help people but if you really want blazing fast disk
performance it’s probably a good idea to use an SSD.
Great, well, thank you
so much for chatting to me about Raspberry Pi 4 and I hope everyone’s got a bit more a
better idea of how… what we’ve done to make this better, faster right.
Thanks, Rob!
Thank you! Raspberry Pi 4 is out right now
and you can find out where to buy one at the link down below or right here in
the Raspberry Pi Store. Now don’t miss issue 83 out on Thursday for more about Raspberry Pi 4, including interviews and even more benchmarks. Subscribe today to
secure yourself a copy, and if you sign up for our 12 month subscription you’ll
also get a free Raspberry Pi. Check out all our subscription options by following the
link down here or up here somewhere anyway I’ve been Rob from The MagPie, the
official Raspberry Pi magazine, and I’ll see you next time

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