<ssvb>
willmore: I was just stupid enough to initially order a somewhat overpriced spi flash module on aliexpress before finding a cheaper option, I can't really recommend it
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<willmore>
ssvb, okay, thank anyway. You're in Europe?
<ssvb>
yes
<willmore>
Okay, so local suppliers aren't going to be 'local' to me. :( I'll find something.
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<phiplii>
I glad to see that Armbian has the FTDI drivers built in...
<phiplii>
because I really should have checked /before/ I spent the whole day moving a small webserver onto it from an old broken ("official") orangepi install of debian
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<longsleep>
I am just doing some thermal testing of the Pine64 - Linux SoC temperature shows as about 20C more than the temperature taken from the outer surface of the A64 chip. Anyone got a clue if that large difference is normal?
<longsleep>
i mean its 90C vs 70C
<apritzel>
longsleep: doesn't sounds unreasonable to me, also the temperature conversion could be off (sensor not calibrated)
<longsleep>
apritzel: mhm ok - i wonder if that means that heat sinks are not so effective
<KotCzarny>
so you are measuring temp. of the heatsinks and not the soc?
<longsleep>
KotCzarny: no heat sink yet - directly on the SoC surface
<KotCzarny>
what are you using to measure? ir termo or something else?
<longsleep>
KotCzarny: multimeter sensor cable
<KotCzarny>
try different points on soc?
<longsleep>
KotCzarny: yeah did that already, did not find big differences
<longsleep>
i mean the farther from the middle the cooler, but only about 5C less at the corners
<longsleep>
hottest in the middle
<KotCzarny>
do you have any other thermo to confirm readings?
<KotCzarny>
also, keep in mind, the soc's plastic casing isnt the best one to conduct heat, so it might be hotter inside
<longsleep>
yes i have two multimeters and both show about the same
<longsleep>
sure, but the SoCs plastic casing is where the heat sink connects
<longsleep>
i received a heat sink from Pine64 today
<phiplii>
longsleep : with a plastic casing vs metal contacts on the underside, I'd guess most of the heat leaves through the base
<longsleep>
anyhow - to give you some numbers - Pine64 at 23C ambient creates 3.15 khash/sec at stable 89C with 4 cores at 1056MHz without heat sink
<longsleep>
phiplii: yeah i measured temp at the bottom and its much cooler there (around 55C), and the board lies flat on the table
<phiplii>
The temperature that matters is the highest bit
<phiplii>
likely to be right where a core is, or perhaps the GPU
<phiplii>
it will be a tiny area inside
<phiplii>
everything else is going to be lower
<longsleep>
phiplii: right, i am trying to get a feeling how useful a heat sink would be - the GPU is not doing anything in this kind of workload
<phiplii>
I was looking at something similar with thermoelectric generators the other day
<phiplii>
it wasn't my work so I didn't dig far
<phiplii>
but there should be ballpark calcs on tinternet for heat rejection from heatsinks
<phiplii>
accurate calcs are tricky because some of the heat will be radiated, and to calculate that precisely you need to know about the environment (what you're radiating to)
<phiplii>
but the transfer to air directly should be a bit better
<longsleep>
right, what is the usual environment people run their sunxi boards?
<longsleep>
are shitty cases common?
<phiplii>
heh
<KotCzarny>
yup
<phiplii>
are OPi OEM cases transparent to IR?
<phiplii>
:)
<KotCzarny>
my boards run either caseless amd vertical or in metal box
<KotCzarny>
plastic cases are usually isolators when it comes to heat
<phiplii>
metal boxes are better by a long way than plastic
<phiplii>
as KotCzarny says
<longsleep>
well my boards usually run in a 19" rack with steady cool air flow
<phiplii>
for the price, a heatsink does a lot of good
<longsleep>
but hey, in my home i have a shelf which has my audio and video machine inside and its easily 60C in there
<longsleep>
how does one type the degree symbol on an english keyboard
<phiplii>
with difficulty
<phiplii>
you need to use alt-gr and type the thingy number
<phiplii>
which I forget
<longsleep>
alt-gr err
<longsleep>
do not have that either
<phiplii>
248
<longsleep>
no windows
<phiplii>
same
<phiplii>
on a mac it is opt-shift-8
<KotCzarny>
60C is perfectly readable
<KotCzarny>
dont overdo :P
<phiplii>
I usually just write 18*C
<longsleep>
heh ok
<longsleep>
i suppose i can do that
<phiplii>
or google the wikipedia page and copy it out...
<phiplii>
which I so don't do
<longsleep>
KotCzarny: yes, but 60*C ambient temp will have a huge impact how effective a heat sink is
<KotCzarny>
i love it how seamlessly openwrt upgraded (12 to 15)
<longsleep>
Ɉ
<phiplii>
°
<KotCzarny>
wrote flash, yet it maintainet configs/files
<phiplii>
if you need one now
<longsleep>
phiplii: no i just found it lame to write 90C all the time here in the chat
<KotCzarny>
if your ambient temp is >30C, then you are doing something wreong
<longsleep>
KotCzarny: inside shelf with my switch wifi psu and two arm boards its around 60˚C
<longsleep>
hah!
<phiplii>
Fan would fix it fairly easily - I can keep the whole conservatory <30 with one 120mm fan and a slightly open window...
<longsleep>
got it
<phiplii>
*<30
<longsleep>
STRG+SHIFT+2da = ˚
<longsleep>
(on Linux)
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<longsleep>
one can write any unicode character that way
<longsleep>
just need to know the hex code :{
<longsleep>
phiplii: i have a no fans policy in my apartment :)
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<KotCzarny>
longsleep: still, if its 60C you are doing it wrong :P
<longsleep>
KotCzarny: well there is no air flow at all in there
<KotCzarny>
you should make some strategically located holes to make air move
<phiplii>
or use some metal to wick the heat out
<longsleep>
KotCzarny: it works just fine that way - if it would have wholes i would have to do something about all the freaking LEDs in there
<phiplii>
blutac
<KotCzarny>
hehe
<phiplii>
the friend of people who have their computer in their bedroom's best friend
<phiplii>
sigh
<longsleep>
yeah, but hey it works and - but any Allwinner board would probably not
<KotCzarny>
longsleep: but blinkenlichts ist fun!
<phiplii>
delete words until that makes sense
<longsleep>
one should not have a compute in the bedroom
<longsleep>
+r
<KotCzarny>
you mean tablet/phone? :P
<KotCzarny>
air conditioner controller? :P
<longsleep>
i really mean any electronics at all
<KotCzarny>
you cant get away from e-m waves
<KotCzarny>
at least thos sbc boxes are low power
<longsleep>
yeah .. i am ok with it if the stuff is invisible :P
<longsleep>
anyhow, somebody else has numbers for their SoC how many cpuminer hashes/sec per core ? Pine64 does 0.8 per core no heat sink
<ssvb>
longsleep: regarding cpuminer, for best hash/sec results it needs to be compiled as 32-bit code and also explicitly with -mfpu=neon in CFLAGS
<KotCzarny>
does it really matter? those boards are made for diy, not performance/$$$,watt
<longsleep>
ssvb: got it - i just wanted to see if that is in reasonable range which according to your link it seems to be
<ssvb>
KotCzarny: the point was that we want to run a reasonably optimized realistic code for power consumption tests
<phiplii>
longsleep : When I was a student I didn't have much choice where I kept my computer - I only had one room of my own
<KotCzarny>
ssvb: uhum
<ssvb>
KotCzarny: while mining digital coins on a CPU is not a very practical task, it is at least somewhat "realistic" when compared to a purely synthetic cpuburn
<ssvb>
longsleep: regarding the 20C difference between the sensor (junction temperature?) and the outer surface, the A64 datasheet provides some numbers
<ssvb>
longsleep: it has "Junction-to-ambient thermal resistance" listed as 21.6 °C/W
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<ssvb>
longsleep: but for the outer case surface we would probably need "Junction-to-case thermal resistance", which is listed as TBD
<longsleep>
means they have not measured it or leave it to their customers
<ssvb>
still having some difference between the outer case surface temperature and the junction temperature is quite normal
<longsleep>
ssvb: yes sure, i felt that 20C is a little high though
<longsleep>
ssvb: i am trying to get an idea what i should expect from a heat sink
<ssvb>
without a heatsink we could estimate the SoC power consumption as (90˚C - 23˚C) / 21.6 °C/W = ~3.1 W
<longsleep>
yes
<ssvb>
or something like 620 mA from a 5V PSU
<ssvb>
can you also measure the current draw?
<longsleep>
ssvb: not at the moment, i am in the living room watching soccer :)
<longsleep>
ssvb: but in general sure
<ssvb>
but of course there are other components on the PCB consuming power, not just the SoC alone
<longsleep>
sure
<longsleep>
i have ethernet connected, do the specs include the GPU (as its on the SoC)?
<longsleep>
i have UART connected which draws some power, no USB no HDMI
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<longsleep>
heatsink had ambient temperature when mounted, took about 4 minutes for the system to reach 80˚C again
<longsleep>
(which is the first trip point)
<KotCzarny>
now add some micro fan
<longsleep>
no fan :P
<KotCzarny>
and be amazed :P
<KotCzarny>
while i agree with you on the no-fan policy, they work wonders
<longsleep>
yes i know
<KotCzarny>
and for the test you can add them temporarily
<longsleep>
no i want to test the heat sink
<KotCzarny>
make some heatpipe then
<longsleep>
and it just failed to keep the system from reaching the first trip point at 23*C
<longsleep>
its the heat sink people might want to buy from pine64, not something i want to make
<longsleep>
the question is if it makes sense to tell people to get it or not
<KotCzarny>
well, it lowered the temp by a few C
<phiplii>
how did you bond the heatsink to the soc?
<longsleep>
i mean the system is faster now 0.84khash/s per core vs 0.80 without (as the temp is now 10*C lower)
<longsleep>
phiplii: it came with some thermal glue pad and i just placed it on the SoC as a normal user would do :)
<phiplii>
what do normal users look like? I don't think I've seen one?
<longsleep>
phiplii: it is pretty shitty though, as the heatsink is also covering the dram which have a sligtly less height - so its not even
<KotCzarny>
normal users are those that install images from pine64.com site
<KotCzarny>
;)
<KotCzarny>
etc
<longsleep>
havent they linked my images?
<longsleep>
err image, as i do only have one these days
<KotCzarny>
werent they the ones that ignored your work because 'images were too little' ?
<longsleep>
yes ..
<phiplii>
?!
<KotCzarny>
:)
<phiplii>
heh
<KotCzarny>
yup, that kind of 'normal' users
<KotCzarny>
clueless kind
<KotCzarny>
as opposed to hackers
<longsleep>
but the heatsink they sent me is pretty decent, its 45*C everywhere
<longsleep>
while the SoC now shows 80*C
<longsleep>
10*C less, only shortly touching the first trip point (which is at 80*C)
<KotCzarny>
longsleep, put the board vertically?
<phiplii>
Do you have access to a milling machine?
<phiplii>
you could take a skim off to fix the SOC / DRAM heigh issue
<longsleep>
phiplii: yes, but i will not do hardware myself
<longsleep>
phiplii: that should be done by them
<phiplii>
where's the fun in that?
<longsleep>
time constrains - one cannot do everthing :{
<phiplii>
:(
<longsleep>
hum i touched the board to place it vertical and it rebooted :/
<longsleep>
maybe the micro USB plug is falling off soon
<phiplii>
Someone at work got offered a free Pine64, but they didn't see the email until a couple of days after they'd had another that said "if you don't answer within the day, we withdraw the offer"
<phiplii>
No free stuff for you
<longsleep>
lol
<KotCzarny>
:>
<longsleep>
i think the heatsink should be larger
<longsleep>
the height could be doubled so it comes even with the height of the ethernet port
<longsleep>
then it might be enough to stay below 80C at full speed
<KotCzarny>
yup, the more, the merrier
<phiplii>
Is all this just running at 1.2ghz?
<longsleep>
1152.00 Mhz
<longsleep>
not even 1.2
<longsleep>
for whatever reason they chose 1152 to be the maximum while advertising for 1200
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<longsleep>
probablue due to undervoltage issues
<phiplii>
so... where does it gain over the H3, or is it a one trick pony? (64bit)
<longsleep>
well i just wanted it for arm64 and armhf compile platform and it is awesome for that
<phiplii>
have they changed the specs since they first announced themselves? I swear it looked a bit more interesting the first time I read about it
<phiplii>
although I did realise that all the videos talked about features that aren't on the base model
<longsleep>
phiplii: not that i am aware of, 2GB 1000M NIC arm64 quad core is all what i care about
<longsleep>
KotCzarny: vertical is just 1*C difference, i almost cannot tell the difference
<KotCzarny>
uhum
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<ssvb>
longsleep: how does this heatsink look? got a picture?
<longsleep>
ssvb: the pine64 heatsink should be the height of yours, i think then it might prevent it from reaching 80*C
<ssvb>
longsleep: but they probably want to be able to use some shields attached to gpio expansion headers
<ssvb>
I can imagine that a tall heatsink can get in the way
<longsleep>
right, well i sent my suggestions to them so lets see what happens :)
<longsleep>
other wise the heat dissipation of the thing is quite good
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<tkaiser>
longsleep: If it's only 10C under load then the heatsink from Pine64 folks isn't efficient. Any cheap 50 Cent 20x20mm heatsink with 5mm height (google for 'cubie 20x20 heat sink') does better. Covering both SoC and DRAM with different height might be the culprit.
<ssvb>
tkaiser: the load was not too heavy in longsleep's test
<longsleep>
tkaiser: well, it cooled down pretty good after mounting it
<longsleep>
tkaiser: so i assumed it connected well with the SoC
<tkaiser>
Left OPi Plus 2E (no heatsink), middle BPi M2+ (cheap heatsink), right OPi Lite (no heatsink)
<longsleep>
tkaiser: yes i saw that - but well there is only one Pine64 PCB as of now
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<longsleep>
tkaiser: also the heatsink thermal glue pad is dissolving - i probably should replace it with good quality thermal glue
<longsleep>
tkaiser: i also did a quick try when mointing that heatsink only on the SoC which works but no visible difference
<tkaiser>
longsleep: Sure, I'm curious how OPi 3 and PC 2 (or whatever weird names Steven/Xunlong chose for their H64 based boards) will perform regarding throttling. Pine64 seems to be Allwinner's reference design minus some stuff (which might explain the large size)
<longsleep>
tkaiser: yeah that will be interesting - did they announce release plans/schedule already?
<tkaiser>
longsleep: Not that I know. But at least a prototype should exist since one picture was posted in OPi forums a while ago.