August Thrust (Raspberry Flavor)

[OC Maximus]

I'll start it off.

A little fun with raspberry pi 2 and a can of dust off. I ran out of cold pretty quick :)

7692

[OC Maximus]

Movin' on up :)

Once I figure this thing out I'll type up a how to for everyone to play with.

Made a nice little heat sink for the pi, ready for pawnage. Just need to find something to pour into it ;)

Weeeeeeeee!!!!

http://i464.photobucket.com/albums/rr4/383HEMI/Untitled_zpsl2w2yyk9.png

http://i464.photobucket.com/albums/rr4/383HEMI/20150802_101736%202_zpsnkhdj7d6.jpg

[OC Maximus]

Picked up a couple cans of Power Duster and took her down to -20C.

Found the limit with 1.4v to core. Ready for vmod :)

Overclock:

force_turbo=1
arm_freq=1140
gpu_mem=50/50
core_freq=500
sdram_freq=500
over_voltage=8


http://i464.photobucket.com/albums/rr4/383HEMI/Raspberry%20Pi%202/20150803_175138_zpsaouiu8yo.jpg

http://i464.photobucket.com/albums/rr4/383HEMI/Raspberry%20Pi%202/20150803_174145_zpsnkrlf6km.jpg

http://i464.photobucket.com/albums/rr4/383HEMI/Raspberry%20Pi%202/20150803_175954_zpsqkdn7ofd.jpg

http://i464.photobucket.com/albums/rr4/383HEMI/Raspberry%20Pi%202/20150803_191117_zpsb7lasuls.jpg

[Kal-EL]

That's a cool little project, looks like alot of fun and economical to boot.


http://vignette2.wikia.nocookie.net/smurfs/images/7/78/Smurf_Magic_Berries.jpg/revision/latest?cb=20110922190220

[OC Maximus]

My fingers taste like chemicals and my head is still feeling a little dizzy..... :Dizzy:

Need better ventilation in here :shock:

Yeah, fun little project.

Searching for a vmod. If anyone finds a Raspberry Pi 2 vmod before me please post it up and share. ;)

Thanks :thumbsup:

[Kal-EL]

u run out of voltage?

Think you could seal up your setup with a plexi case like this one? Maybe mitigate condensation issued?
http://www.amazon.com/Raspberry-Pi-BCM2836-900MHz-Heatsink/dp/B00W1B5RMW/ref=sr_1_1?s=pc&ie=UTF8&qid=1438670926&sr=1-1&keywords=4+IN+1+Raspberry+Pi+2+Model+B+1GB+RAM+Qua d+Core+BCM2836+900MHz+CPU+%2B+Clear+Case+%2B+Fan+% 2B+Heatsink+Kits

[OC Maximus]

Think I'm tapped out at 1.4v

1.2v is default

https://www.raspberrypi.org/wp-content/uploads/2012/10/Raspberry-Pi-R2.0-Schematics-Issue2.2_027.pdf

I didn't really plan on going subzero today. Just threw a little eraser around the arm cpu and went for it. 3 hours later started to get condensation issues. Next time I'll do a proper insulation job so hopefully it won't be an issue.

[Kal-EL]

A power board would be handy here.

[OC Maximus]

Found something:

by Zen1 » Sat Apr 11, 2015 8:08 pm

So, I've been working on this project for a while and I just wanted to share my results as there hasn't been much interest in overclocking the BCM2836. Today I managed to overclock my Pi 2 to 1500MHz and I just wanted to share to see if anyone else was interested. I removed L3 and soldered a lead on to the pad nearest C7 so that I could apply a separate core voltage. Using the software overvoltage setting of 8 only brings you up to 1.4V. I used an EVGA epower unit to provide a clean 1.66V. I used liquid nitrogen to cool the chip with a custom made CPU pot I designed. I had to use an extension cable for the SD card as it was getting too cold and I applied a heating pad to the bottom of the board to assist with keeping the RAM warm and defrosting the board. I found the chip coldbugs at -130C and refuses to boot under -90C. I found keeping the ram above 20C helped a lot with booting and stability.
So this is just a teaser to see if there is any other interest out there and to see if anybody knows of anyone who has gone further than this.

https://www.raspberrypi.org/forums/viewtopic.php?f=29&t=107149

I'll look deeper into this tomorrow.

[OC Maximus]

7701

[Kal-EL]

Hope we get some windage and rain. The ash from that Wahiawa Brush fire is all over my house and stinkin up the neighborhood.

[OC Maximus]

Heading to Wahiawa today to look at houses again. Fire sale discount, lol.

[Kal-EL]

lol good luck!

[Witchdoctor]

Wow, that is very close to Ahoka

you guys will be neighbors :)

[Kal-EL]

Yah, just a quick hop to OCA Headquarters :leghump:

[Witchdoctor]

myJvubsLvBU

[OC Maximus]

First vmod fail. I really need a better understanding of these circuits before I start soldering away :)

http://i464.photobucket.com/albums/rr4/383HEMI/Raspberry%20Pi%202/20150806_173057_zpscb8pfxmc.jpg

[OC Maximus]

vMod removed right away. Just wanted to see what it would do. Doesn't raise voltage like I wanted it to. I'll make another go at it tomorrow after some deep meditation.

[Kal-EL]

7727

[OC Maximus]

El Capitan at the helm.

7728

[OC Maximus]

Best run of the day at -100c.

Vcore should read 1.7v

http://valid.x86.fr/cache/screenshot/xnpl8x.png

[OC Maximus]

Finally!

http://www.evga.com/products/images/gallery/220-P2-1200-X1_MD_1.jpg

7744

7745

[Kal-EL]

$267 for a 1200w, friggin sweet.

[OC Maximus]

Feel like it was worth the wait. Been staring at that psu for months now.

Dedicating today to throwing all my old shit away and reorganizing the garage and bench cave. Prepping for Skylake and future Overclocking endeavours. :thumbsup:

[kikicoco1334]

wow $42 promo code lol! nice find!

I am still rocking on the thermaltake 1200 i got while back :D

[Buckeye]

You lifted that monster up on a table HAHAA

Hey it looks like its still working good !

Any trouble with cold bugs starting it ?

[Kal-EL]

No issues yet, still purrs nicely for its age.