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Raspberry Pi 4

raspberrypi.org

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Re: Raspberry Pi 4

#851

Post by StudentStuff »

NikkiA wrote: post #472
StudentStuff wrote: post #93

Earlier quoted context omitted.

The OrangePi 3 at $40 is also pretty neat, PCIe 1x, 8GB onboard eMMC, 4x USB 3.0, Bluetooth 5, Wireless AC (pretty sure they beat Raspberry Pi to the punch on this...) and it has mainline kernel support: http://www.orangepi.org/Orange%20Pi%203/

The one downside to OrangePi systems is that they use a (semi-) non-standard DC connector (1.8mm I think, definitely not 2.1mm or 2.5mm though).

I think this is to avoid the plentiful 12v adapters that use those sizes, as you could fry the board with a bad PSU. The 5v adapters that do use those more standard sizes are generally 500mA or 1A, which is enough to (unreliably) boot and run the board.

Re: Raspberry Pi 4

#853

Post by stedaniels »

mvip wrote: post #326
stedaniels wrote: post #317

Earlier quoted context omitted.

Why don't you just use USB3 storage?

That's fine for your desk, but hardly a good solution when deploying Raspberry Pis in the wild.

So all those many hundreds of thousands of VM hosts out there deployed in production, running their hypervisors from USB must be failing left right and centre... or not.

Re: Raspberry Pi 4

#854

Post by snvzz »

elihu wrote: post #737

> The power savings delivered by the smaller process geometry have allowed us to replace Cortex-A53 with the much more powerful, out-of-order, Cortex-A72 core; this can execute more instructions per clock, yielding performance increases over Raspberry Pi 3B+ of between two and four times, depending on the benchmark. Looks like the Pi 4 will be vulnerable to Spectre. That's unfortunate, since it seems like this is qui…

>ARM has reported that the majority of their processors are not vulnerable, and published a list of the specific processors that are affected by the Spectre vulnerability: Cortex-R7, Cortex-R8, Cortex-A8, Cortex-A9, Cortex-A15, Cortex-A17, Cortex-A57, Cortex-A72, Cortex-A73 and ARM Cortex-A75 cores.

So, "most not vulnerable", then they proceed to list almost their entire lineup as vulnerable.

These PR guys sure are stretching it.

Re: Raspberry Pi 4

#855

Post by throw0101a »

ars wrote: post #665
throw0101a wrote: post #398

Earlier quoted context omitted.

> Gigabit Ethernet! Does it have PoE? Having to deal with one less cable would be nice. Especially given that the latest spec, IEEE 802.3bt from September 2018, now allows for up to 100W per port: * https://en.wikipedia.org/wiki/Power_over_Ethernet

> now allows for up to 100W per port: It doesn't draw anywhere near that. 15W max (for accessories), and 7W in heavy use (without anything other than the board itself).

My point was that PoE, especially with the recent revision, allows for very useful levels of power to be drawn, so if you're going to have an 'embedded' system with an Ethernet port, I would think it'd be useful to use it.

Why plug in two cables (USB-C (power) and Ethernet (comms)) when you can just plug in one?

Re: Raspberry Pi 4

#856

Post by kjsbfkjbf »

intsunny wrote: post #61

The RPI4 w/ 4GB RAM is going to be a very welcomed upgrade in the emulation scene. N64, PS1, Dreamcast and PSP games will run so much smoother.

I'm a complete noob when it comes to RPI, but does it emulate these games well despite not having a strong (or any?) GPU?

Re: Raspberry Pi 4

#857

Post by megous »

swebs wrote: post #480
megous wrote: post #411

What's the thermal story? Looks pretty terrible so far. The case has no holes. The board has no holes for the heatsink, so you'll have to glue it. Space for heatsink is small. Is it made so that the board serves as a heatsink at the very least?

Scroll down to the "Power and Heat" section https://www.tomshardware.com/reviews/raspberry-pi-4-b,6193.h...

https://www.cnx-software.com/2019/06/27/raspberry-pi-4-bench...

More details.

Re: Raspberry Pi 4

#858

Post by gonzo »

bin0 wrote: post #727
Marsymars wrote: post #604

Earlier quoted context omitted.

AES-NI for x86 CPUs was going to be required for the next release of pfSense (2.5), but that requirement was dropped when the API that necessitated AES-NI was pushed back from the 2.5 release. AES-NI will probably still be a requirement at some point in the future. AES-NI won't be a requirement for ARM CPUs - Netgate sells first-party ARM-based pfSense appliances that have non-AES-NI hardware crypto acceleration that…

Yeah I'm actually using netgate boxes right now. I just figure rpis are cheaper. Thanks for the info.

they're not a lot less expensive by the time you have an equivalent system.

The SG-1100 is based on the v7 espresso.bin board. a 2G version of that is $99 by the time you have case, heat-sink, eMMC and power supply. We sell them for $159.

A 2G RPi 4 with case, heatsink, and power supply is $76.30. You have WiFi, but no second (or third0 Ethernet.

Also, someone has to pay the developers, right?

Re: Raspberry Pi 4

#859

Post by monery »

detaro wrote: post #694
ris wrote: post #692

Earlier quoted context omitted.

I'm intrigued as to why they didn't use a big.LITTLE design (or whatever they're calling it these days). Perhaps mainstream-linux still isn't so great at handling it.

Really the only benefit of that is energy efficiency if it is used correctly, in exchange for additional cost or lower max performance. Makes sense for a smartphone, less so for a mains powered device (and the Raspberry Pi SoCs originally were designed for set-top boxes, although I don't know if that's still true for the new ones or if they're custom)

energy efficiency also leads to higher sustained clock speeds if your not using a fan to move air over a heatsink
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