I just watched this video before checking in here. He gets some interesting results with Pi3, a aluminum heatsink and sysbench. He is a teacher so you may need some patience as he explains everything but I like his videos. Skip ahead to 7:40 for the sysbench tests.
@KF7IJZ - I noticed in the pics on Twitter you have both the AC Infinty fan and the Thermaltake USB fan. How do they compare noise wise and vibration? Any other comments comparing the two?
If Pi3 had the same performance without fan, we could go up to:
1 work/42,494 seconds @ 5watts = 4.71e-6 work/sW - which looks promising.
Sorry for the meaningless unit (work per second watt), I just wanted to compare tests.
So I'd still need the data on the Pi3 without fan to find out how far it can go.
Does this look right? Poppageek, I assumed that 42,494 was an average of all samples using fan.
@Bikeman do you have numbers on the Pi3 without fan?
@PG3.14 did you get those numbers? :)
Sorry for the meaningless unit (work per second watt), I just wanted to compare tests.
Not at all, this is all nice in SI-units: a Ws is also called a Joule so this is credits per Joule.
Quote:
@Bikeman do you have numbers on the Pi3 without fan?
Not yet. It would need to figure in the effect of throttling down after reaching ca 80 deg C which would reduce both performance and power, but would depend on ambient temperature and the passive cooling used.
@KF7IJZ - I noticed in the pics on Twitter you have both the AC Infinty fan and the Thermaltake USB fan. How do they compare noise wise and vibration? Any other comments comparing the two?
Thanks!
I bought the Thermaltake first because I could source it locally at MicroCenter. It is higher output, but quite loud at full speed. The stand for the Thermaltake is also quite flimsy and not flat out of the box. Overall, I like the AC Infinity fans better, but the speed controller is sort of pointless for my use, as I just keep them on high. I'm double stacking 2 80mm fans one on top of another for the stack. I'm also going to consider cutting the USB cable to be much shorter.
Because of spring house chores and two little ones running around, I haven't had time to get back to my Pi 3 cluster (I have all the parts), but I do have one annoying observation about the Pi 3 WiFi - it stinks! I have to manually intervene by resetting the Pi about every 3-5 days whereas my official Pi WiFi dongle is rock solid. I was hoping I wouldn't need a switch for the Pi 3 stack, but I am going to mount the Pi 3s to a switch like the Pi 2s. This time I will mount the stack far enough to a side on the switch that I can mount the fan stack to the switch.
If Pi3 had the same performance without fan, we could go up to:
1 work/42,494 seconds @ 5watts = 4.71e-6 work/sW - which looks promising.
Sorry for the meaningless unit (work per second watt), I just wanted to compare tests.
So I'd still need the data on the Pi3 without fan to find out how far it can go.
Does this look right? Poppageek, I assumed that 42,494 was an average of all samples using fan.
@Bikeman do you have numbers on the Pi3 without fan?
@PG3.14 did you get those numbers? :)
My Pi 3 heats up too fast and too hot to run without the fan for more than a minute or so. The numbers for the Pi 3 were with a fan.
Personally I like the simplicity of the Pi 2. I wish it was still going to be available. Places are out of stock or have raised the price on the Pi 2. I have had no problems with the Wifi on the Pi 3, so far, so that kinda makes up for the fan being needed I guess. I live in the US south and it gets hot and humid and I get cranky about heat when it does. So cool running crunchers make me happy. ;-)
I do apologize for posting as PG3.14. We be one and da same. My RPi are on the Raspberry Pi team and Poppageek is on Xtremesystems team for my CPUs and GPUs.
Went to order the WD PiDrive and discovered a 3-4 week delivery time. Then that razor sharp lightning fast mind remembered I have a 500gig laptop drive and a USB-SATA cable that is powered.
So I am using Berryboot to install Ubuntu Mate to the HD. It says 1 hour plus left to download. Already chewed the corner of my desk off. Not a patient person......
I have had problems with UM. First time it would not expand the file system no matter what I tried. gpated nor fdisk would do it.
Second time everything fine until update and upgrade and it would no longer boot. Both times it was to a Sandisk 16 gig SD. Which works fine with Raspian. Before the update it ran very nicely on the Pi 3. I always liked Gnome 2 and the Wifi and Bluetooth worked great. They are making great progress with it.
Went to order the WD PiDrive and discovered a 3-4 week delivery time. Then that razor sharp lightning fast mind remembered I have a 500gig laptop drive and a USB-SATA cable that is powered.
So I am using Berryboot to install Ubuntu Mate to the HD. It says 1 hour plus left to download. Already chewed the corner of my desk off. Not a patient person......
I have had problems with UM. First time it would not expand the file system no matter what I tried. gpated nor fdisk would do it.
Second time everything fine until update and upgrade and it would no longer boot. Both times it was to a Sandisk 16 gig SD. Which works fine with Raspian. Before the update it ran very nicely on the Pi 3. I always liked Gnome 2 and the Wifi and Bluetooth worked great. They are making great progress with it.
Third time is the charm? Right? Please... ;-)
I am not familiar with Berryboot but use gparted to accomplish this type of build.
[EDIT] PLEASE NOTE: You must use the ubuntu-mate-15.10.3-desktop-armhf-raspberry-pi-2.img for the PI3 or it will not boot.
My interpretation of the proceeding is that you want to install Mate by having it boot from the microSD card while the OS portion is on an external hard drive. There is no other OS involved. If this is true then you might want to have a look at: my write up here. It was originally written for the raspi distro but is easily translated to Ubuntu Mate.
There is a file on the /boot partition that needs to be modified. It points to root which is now on the external drive. Without modifying that file there will be boot problems. This is covered in my write up. If you need additional info message me privately if you wish.
I just watched this video
)
I just watched this video before checking in here. He gets some interesting results with Pi3, a aluminum heatsink and sysbench. He is a teacher so you may need some patience as he explains everything but I like his videos. Skip ahead to 7:40 for the sysbench tests.
https://www.youtube.com/watch?v=e6okZKRwnTQ
Copper definitely seems the way to go.
Cheers!
@robl - yes mine are 14mm tall.
@KF7IJZ - I noticed in the
)
@KF7IJZ - I noticed in the pics on Twitter you have both the AC Infinty fan and the Thermaltake USB fan. How do they compare noise wise and vibration? Any other comments comparing the two?
Thanks!
Thanks for the answers,
)
Thanks for the answers, guys.
From the data poppageek posted, looks like Pi2 without fan is more energy efficient than Pi3 with a fan:
Pi2: 1 work/59,286 seconds @ 4watts = 4.21e-6 work/sW
Pi3: 1 work/42,494 seconds @ 6watts = 3.92e-6 work/sW
If Pi3 had the same performance without fan, we could go up to:
1 work/42,494 seconds @ 5watts = 4.71e-6 work/sW - which looks promising.
Sorry for the meaningless unit (work per second watt), I just wanted to compare tests.
So I'd still need the data on the Pi3 without fan to find out how far it can go.
Does this look right? Poppageek, I assumed that 42,494 was an average of all samples using fan.
@Bikeman do you have numbers on the Pi3 without fan?
@PG3.14 did you get those numbers? :)
RE: Sorry for the
)
Not at all, this is all nice in SI-units: a Ws is also called a Joule so this is credits per Joule.
Not yet. It would need to figure in the effect of throttling down after reaching ca 80 deg C which would reduce both performance and power, but would depend on ambient temperature and the passive cooling used.
My Pi3 at stock clock draws
)
My Pi3 at stock clock draws 4.1W, official Pi3 PSU, no fan, no throttling...
edit: with fan 4.4W
RE: @KF7IJZ - I noticed in
)
I bought the Thermaltake first because I could source it locally at MicroCenter. It is higher output, but quite loud at full speed. The stand for the Thermaltake is also quite flimsy and not flat out of the box. Overall, I like the AC Infinity fans better, but the speed controller is sort of pointless for my use, as I just keep them on high. I'm double stacking 2 80mm fans one on top of another for the stack. I'm also going to consider cutting the USB cable to be much shorter.
Because of spring house chores and two little ones running around, I haven't had time to get back to my Pi 3 cluster (I have all the parts), but I do have one annoying observation about the Pi 3 WiFi - it stinks! I have to manually intervene by resetting the Pi about every 3-5 days whereas my official Pi WiFi dongle is rock solid. I was hoping I wouldn't need a switch for the Pi 3 stack, but I am going to mount the Pi 3s to a switch like the Pi 2s. This time I will mount the stack far enough to a side on the switch that I can mount the fan stack to the switch.
My YouTube Channel: https://www.youtube.com/user/KF7IJZ
Follow me on Twitter: https://twitter.com/KF7IJZ
RE: Thanks for the answers,
)
My Pi 3 heats up too fast and too hot to run without the fan for more than a minute or so. The numbers for the Pi 3 were with a fan.
Personally I like the simplicity of the Pi 2. I wish it was still going to be available. Places are out of stock or have raised the price on the Pi 2. I have had no problems with the Wifi on the Pi 3, so far, so that kinda makes up for the fan being needed I guess. I live in the US south and it gets hot and humid and I get cranky about heat when it does. So cool running crunchers make me happy. ;-)
I do apologize for posting as PG3.14. We be one and da same. My RPi are on the Raspberry Pi team and Poppageek is on Xtremesystems team for my CPUs and GPUs.
Cheers!
RE: As Bikeman said a $15
)
Noticed this, no idea why but my times on Pi 3 and Pi 2 have improved. Times of last 20 samples:
Pi2 Time
Run ------- CPU
58,794.05 - 58,658.86
Pi3 Time
Run ------- CPU
41,655.23 - 41,262.09
Went to order the WD PiDrive
)
Went to order the WD PiDrive and discovered a 3-4 week delivery time. Then that razor sharp lightning fast mind remembered I have a 500gig laptop drive and a USB-SATA cable that is powered.
So I am using Berryboot to install Ubuntu Mate to the HD. It says 1 hour plus left to download. Already chewed the corner of my desk off. Not a patient person......
I have had problems with UM. First time it would not expand the file system no matter what I tried. gpated nor fdisk would do it.
Second time everything fine until update and upgrade and it would no longer boot. Both times it was to a Sandisk 16 gig SD. Which works fine with Raspian. Before the update it ran very nicely on the Pi 3. I always liked Gnome 2 and the Wifi and Bluetooth worked great. They are making great progress with it.
Third time is the charm? Right? Please... ;-)
RE: Went to order the WD
)
I am not familiar with Berryboot but use gparted to accomplish this type of build.
[EDIT] PLEASE NOTE: You must use the ubuntu-mate-15.10.3-desktop-armhf-raspberry-pi-2.img for the PI3 or it will not boot.
My interpretation of the proceeding is that you want to install Mate by having it boot from the microSD card while the OS portion is on an external hard drive. There is no other OS involved. If this is true then you might want to have a look at: my write up here. It was originally written for the raspi distro but is easily translated to Ubuntu Mate.
There is a file on the /boot partition that needs to be modified. It points to root which is now on the external drive. Without modifying that file there will be boot problems. This is covered in my write up. If you need additional info message me privately if you wish.