Zero vs Zero 2, What is the difference?

#9

I was asking that as there is so much less pcb which often helps dissipate heat. I was asking if not being able to underclock as freq is fixed is a problem and apparently not so “If a proper heatsink is used” didn’t ask what a proper heatsink was but not a fan of underside CPU’s purely to simple convection and often the oversized heatsink needs.
I often felt with the Rock4 most of us where using it upside down but if you look at https://wiki.radxa.com/Zero2/Hardware/Revisions then there is no mention and the info we have looks like its top side with a dedicated gpio for fan speed and guess its own voltage regulator or pwm output.

The Zero2 is as interesting as the Rock5 with 4x A73 running at 2.2Ghz and G52 MP4 in a zero like format and hopefully more budget based price is an intriguing device and makes this a very interesting year for radxa and some of us who purchase.

Still not sure on the licencing or you can use https://github.com/VeriSilicon/tflite-vx-delegate with the NPU but we will see I guess.

#10

Here you can find the product picture. The taped 3-pin connector is for a small PWM fan to use along with a custom heatsink.

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#11

Its a slightly fatter Zero by the looks of it but looking very cool.
Trying to figure where you can fit onboard antenna with all that going on :slight_smile:

#12

On my sample boards they all use external antenna, so I don’t know what the onboard antenna will look like. Although I see there is some empty space on the other side of antenna connector, just to the left of microSD card slot.

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#13

There is not much but sure you guys will find some eagerly awaiting revision 1.1 to have a play.
I think offboard prob will be great for enclosures and better reception and those who are not so case inspired will go for onboard.

Its looking really good and keep checking for announcements, suppose you don’t have a non official approx release date?

#14

Not at the moment, although the project is progressing nicely so that should be relatively soon. On Linux side we have working debos-radxa, Armbian, and Manjaro port all running mainline or close to mainline stuff. @anon39001862 just booted Android yesterday, and he is likely going to work on CSI/DSI/NPU enablement. Then we can roll a 1.1 hardware revision to fix those minor issues, and I don’t see what else is blocking the release.

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#15

That’s sexy! Thank you for posting.

#16

Looks amazing!!!

#17

Is eMMC soldered onto the board of the Zero2?

#18

Think so as it sets the SKU and looks so. https://wiki.radxa.com/Zero2/Hardware/Product

https://wiki.radxa.com/Zero2/Hardware/SKU

#19

Looking forward to order a zero 2……. For my setup powering device(s) through USB is crucial.

I am currently use a Pi 4 with a OAK-d-pro camera requiring > 1A from the USB port. Would this be possible using the Zero 2?

What will/is the maximum power output rating for the USB port?

Will there be a difference in USB power output when providing power through GPIO vs USB

King regards

Korstiaan

#20

Doubt it as likely will be at least 15 watt min with USB prob a 24 watt PD might be needed if its anything like the Vim3 which power wise I would say is likely.
If you only have a USB2.0 its 500ma @ 5v so 2.5 watt USB3.0 its 900ma so 4.5 watt max.

The Raspberry Pi 4 consumed idle 3.8 W to 4.0 W . With 1 core being busy, it consumes 4.5 W. With 2 cores being busy, it consumes 5.0 W. With 3 cores being busy, it consumes between 5.4 W and 5.5 W

That are cores alone so you are being very fortunate from your supply device but would say no the Radxa zero is about 3.3 watt and between a Pi3 & 4 so prob a better choice as dont rate VC4/6 at all but each to there own.
Radxa Zero 2 is tiny but packs a punch with GPU, NPU & CPU but that needs a minimum of power even at the lower manufacture process forgot think its 12nm vs Pi 24nm but somewhere around there.
Its an Amlogic amlogic a311d and nothing Radxa can change about that.

Comparison with the Khadas Vim3 will likely not be too far of the mark.


benchmarks prob a better link.

#21

Good info, thx @stuartiannaylor! When I first started reading about the Zero2 I checked out this comparison and my jaw dropped with how much of a performance increase Radxa is adding to this form factor: https://gadgetversus.com/processor/amlogic-s905y2-vs-amlogic-a311d/

I cut down a passive cooler to fit my Zero since it’s going to live in an utility closet. Active cooling the Zero2 seems like a strong option.

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#22

radxa rock5b = rk3588
khadas vim3 = a311d = radxa zero2 soc
radxa zero = s905y2

ncnn neural network benchmark (cpu time, less is better)

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Manjaro 23.02 minimal on 1GB Radxa Zero
#23

Prob but don’t go crazy as a 12v fan on 5v is 42% and virt silent
5v fan on 3.3 is 66%
On ebay or ali 30/40mm are a couple of $

You just need a small movement of air over a heatsink to make a huge difference to a passive.
Generally nearest I get to an enclosure are hex studs as legs but prob blower type fan is better to fit a enclosure than an open chassis type a couple of dollar more than chassis fan but not huge.

But have to agree the Radxa Zero2 CPU, GPU & NPU in this format is a just got to get, I keep annoying the Radxa crew about when the next release revision will be avail.
Radxa a 12m heatsink fits as didn’t bother with the ram but maybe a idea in a small enclosure.

That rk3588 is just bat sh it crazy fast though :slight_smile:

#24

Thanks for the info.!

#25

Thanks @stuartiannaylor, this is good info!

For my current project, I picked up one of these lil fans to mount in the enclosure with the Zero and relays as needed.

I like the idea of connecting it at 3.3V to start rather than running full tilt. If it doesn’t get used this time, it will be ready for either the Zero2 or Rock5B :wink:

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#26

Yeah 200ma supposedly there is 1amp on 3.3v but there is also the soc but pretty sure that should be ok, but on 3.3v that will drop to 0.132 I think.
I tend to go for 12v on 5v because of that but both work pi is only 500ma and I had one running fine.
Its amazing the difference what difference a minuscule amount of airflow can do.

I quite like the blower fans as they are quite easy to stick into place and just draw across an enclosure but sure you will be fine.

#27

Oh, hello turbine fan, I haven’t used these yet but expect I will soon. Thanks for the tip!

#28

Its just a fan like any other but rather than a big hole of fan diameter you can cut a small square hole for the inlet/exhaust depending on which way it spins, but can be more convenient to fit in an enclosure.