Extreme Cooled Raspberry Pi - Page 3 - Overclock.net - An Overclocking Community

Forum Jump: 

Extreme Cooled Raspberry Pi

Reply
 
Thread Tools
post #21 of 117 (permalink) Old 06-26-2013, 06:44 PM
100LB Rig Club
 
RussianJ's Avatar
 
Join Date: Jan 2011
Location: MI
Posts: 2,569
Rep: 93 (Unique: 86)



RussianJ is offline  
Sponsored Links
Advertisement
 
post #22 of 117 (permalink) Old 06-26-2013, 07:12 PM - Thread Starter
New to Overclock.net
 
neo565's Avatar
 
Join Date: Jun 2013
Location: Falmouth, MA
Posts: 278
Rep: 32 (Unique: 23)
Tried setting multiplier anywhere from 11-21. Still didn't work.
neo565 is offline  
post #23 of 117 (permalink) Old 06-27-2013, 07:15 AM - Thread Starter
New to Overclock.net
 
neo565's Avatar
 
Join Date: Jun 2013
Location: Falmouth, MA
Posts: 278
Rep: 32 (Unique: 23)
3.355 Ghz!!!!!!!!! biggrin.gif




Please don't ask me to overclock further because I don't want to fry my Raspberry Pi.
neo565 is offline  
Sponsored Links
Advertisement
 
post #24 of 117 (permalink) Old 06-27-2013, 07:34 AM
New to Overclock.net
 
hawkeye071292's Avatar
 
Join Date: Jul 2011
Location: Baton Rouge
Posts: 1,852
Rep: 58 (Unique: 48)
hawkeye071292 is offline  
post #25 of 117 (permalink) Old 06-27-2013, 07:37 AM
New to Overclock.net
 
hawkeye071292's Avatar
 
Join Date: Jul 2011
Location: Baton Rouge
Posts: 1,852
Rep: 58 (Unique: 48)
Quote:
Originally Posted by neo565 View Post

Tried setting multiplier anywhere from 11-21. Still didn't work.

You may need to find a firmware that will remove those "safety" restrictions.
hawkeye071292 is offline  
post #26 of 117 (permalink) Old 06-27-2013, 07:38 AM
New to Overclock.net
 
Operant's Avatar
 
Join Date: Nov 2012
Posts: 14
Rep: 1 (Unique: 1)
I have one being shipped to my house right now so I'll get a chance to start playing with it. Unfortunately I don't have a dewar for LN2 though I might go the spray can route. Could something similar to the "zombie mods" for GPUs work here? I'm wondering if the power delivery bits aren't providing a stable voltage to the SoC.

Feel free to ask about circuits or code and I'll do what I can to help!
Operant is offline  
post #27 of 117 (permalink) Old 06-27-2013, 07:41 AM
New to Overclock.net
 
hawkeye071292's Avatar
 
Join Date: Jul 2011
Location: Baton Rouge
Posts: 1,852
Rep: 58 (Unique: 48)
Quote:
Originally Posted by Operant View Post

I have one being shipped to my house right now so I'll get a chance to start playing with it. Unfortunately I don't have a dewar for LN2 though I might go the spray can route. Could something similar to the "zombie mods" for GPUs work here? I'm wondering if the power delivery bits aren't providing a stable voltage to the SoC.

Yea I bet thats what it is. May need to be soldered again with better materials. I mean the unit itself is cheap, so you can assume it is made cheap as well. Maybe add a little to it to make the bus wider? Not a soldering fanatic, but shouldn't that provide more stable power?
hawkeye071292 is offline  
post #28 of 117 (permalink) Old 06-27-2013, 07:45 AM
New to Overclock.net
 
ivanlabrie's Avatar
 
Join Date: Aug 2011
Location: Buenos Aires, Argentina. Land of the obscenely expensive hardware
Posts: 8,638
Rep: 350 (Unique: 189)
Epic stuff!

What's that gas and where do you find it? is it cheaper than ln2?
ivanlabrie is offline  
post #29 of 117 (permalink) Old 06-27-2013, 07:47 AM
New to Overclock.net
 
hawkeye071292's Avatar
 
Join Date: Jul 2011
Location: Baton Rouge
Posts: 1,852
Rep: 58 (Unique: 48)
Quote:
Originally Posted by ivanlabrie View Post

Epic stuff!

What's that gas and where do you find it? is it cheaper than ln2?

Its just basic dust remover. Just compressed canned air right? I am sure it is cheaper than ln2 but how long does 1 can last?
hawkeye071292 is offline  
post #30 of 117 (permalink) Old 06-27-2013, 08:29 AM
New to Overclock.net
 
Operant's Avatar
 
Join Date: Nov 2012
Posts: 14
Rep: 1 (Unique: 1)
Quote:
Originally Posted by hawkeye071292 View Post

Yea I bet thats what it is. May need to be soldered again with better materials. I mean the unit itself is cheap, so you can assume it is made cheap as well. Maybe add a little to it to make the bus wider? Not a soldering fanatic, but shouldn't that provide more stable power?

Well, that would contribute more to heat than anything, which can contribute to instability on it's own. You do need a big enough trace for whatever current and voltage you want to run through it. My guess for the culprit is whatever ICs are actually handling the power delivery on the board. Bypassing those with an external setup that is normally overkill allows for a much more stable voltage (less ripple should increase stability to a point). PSU reviews from sites like johnnyGURU.com or overclockers.com (specifically Bobnova) (also note Mods I'm merely pointing to reviews and not advertising here) are excellent examples of how this is tested and shown. There are other sites as well but those are the two that popped into my head first. It all depends on what components are used to get the power that is required. I can explain more if you want.

However, I should point out that I could be completely wrong here. These SoC do have limits just like CPUs and you'll hit them eventually. I haven't used a raspberrypi nor have I seen what the voltage line looks like under a scope (while it is running) so I can't say anything definitive.

Feel free to ask about circuits or code and I'll do what I can to help!
Operant is offline  
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Overclock.net - An Overclocking Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off