## Berry Box - The Transparent Case

rrmcbeth
Posts: 19
Joined: Tue Mar 27, 2012 8:07 pm

### Re: Berry Box - The Transparent Case

It's possible that someone may want to build a "Super Computer" using multiple RPi's.   I believe that some post grad students built one using 64 PC's.  Just think how low cost, low power and small physical size it would be.

One of the first digital computers (the ENIAC) was built in the 40's. It had 17,468 vacuum tubes, 1500 relays, 70,000 resistors, 5,000,000 solder connections and consumed 150,000 watts.  64 RPi's would consume less than 100 watts.  Look how far we have come and what the future holds.

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Yes I'm familiar with this, we have a cluster here at Swansea Uni, they are very cost effective. Though typically a cluster consists of more standard computing hardware, something like a core i7 with a healthy amount of ram.

I keep reading the new metric of comparison in HPC is GFLOPs/watt though... Any idea's on how the R-Pi compares in terms of GFLOPs/watt to a typical cluster node?

rrmcbeth
Posts: 19
Joined: Tue Mar 27, 2012 8:07 pm

### Re: Berry Box - The Transparent Case

I have no idea.  A GFLOP is 1,000,000,000 floating point operation/sec.  A MFLOP = 1,000,000 per seconds. The RPi has embedded math hardware.  So lets make some assumptions:

1)   Clock = 700 mHz

2)   1 Instruction cycle = 2 clock cycles.

3)   A Flop instruction  = 2 instruction cycles

4)   So you get 175,000,000 flops/sec or 175MFLOPS = .175 GFLOPs

5)   The RPi consumes about 1.5 watts.

6)   Therefore, we get 116 MFLOPS/watt/second

I see them going to 100 GFLOP these days. (Power for that speed is needed to calculate GFLOP/Watt)  But 116 MFLOP/W is not bad for a \$35 board.

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Interesting, when the availability is better I'm tempted to buy 10 and do some benchmarking...

vesku
Posts: 6
Joined: Mon Jan 23, 2012 12:11 pm

### Re: Berry Box - The Transparent Case

bruceberry said:

@vesku
The case can be "stacked" back to back, but that would only give you a stack of two. It would however be possible to build a larger structure out of lego to mount all of your Berry Box's too

We were really anticipating much demand for multiple cases, how many do you need?

I need maybe five boxes. Can I just pay 5x5£ through WeFund and pay shipping separately when you are ready to send boxes?

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Hey Vesku,

Shipping is constant regardless of quantity, so if you order 1 box or 5 box's the shipping cost is the same. If you want 'n' box's that would be, total = n*£5+shipping. I'm guessing you'd want EU delivery which would come to £28 total.

Thank's Vesku!

Jeff2
Posts: 15
Joined: Fri Mar 09, 2012 6:58 pm

### Re: Berry Box - The Transparent Case

Looks like funding is up to 20% of the goal:

http://www.wefund.com/project/berry-box

Jim Manley
Posts: 1600
Joined: Thu Feb 23, 2012 8:41 pm
Location: SillyCon Valley, California, and Powell, Wyoming, USA, plus The Universe
Contact: Website

### Re: Berry Box - The Transparent Case

rrmcbeth said:

4)   So you get 175,000,000 flops/sec or 175MFLOPS = .175 GFLOPs

5)   The RPi consumes about 1.5 watts.

6)   Therefore, we get 116 MFLOPS/watt/second

In fact, the GPU in the Pi puts out 26,000,000,000 FLOPS ... yes, that's 26 GIGA-FLOPS!  So, the actual efficiency is ~17.3 GFLOPS/watt/second.

That's why the Pi can render Quake 3 Arena scenes pretty much on-demand with very little lag only when a large number of players wind up in proximity in a scene (e.g., dozens).  It can render about 40,000,000 Gouraud-shaded polygons per second, which puts it between an Original Flavor X-Box and an X-Box 360, which is somewhat below a Sony PS/3.

Now, that's nowhere near i7 levels of performance, so, the Pi is in no danger of putting Intel out of business for high-end clusters.  However, these are single-core CPU-GPU and the ARM CPU is only running at 700 MHz (the GPU is actually running at a slower clock rate.  It has parallel circuits whose sole purpose in life is to multiply a bunch of floating-point 3-D matrices simultaneously and send the result directly out of the HDMI port running at up to 1080p at 30 - 60 frames per second (you have to dedicate half the RAM to the GPU at boot time for the latter).
The best things in life aren't things ... but, a Pi comes pretty darned close!
"Education is not the filling of a pail, but the lighting of a fire." -- W.B. Yeats
In theory, theory & practice are the same - in practice, they aren't!!!

rrmcbeth
Posts: 19
Joined: Tue Mar 27, 2012 8:07 pm

### Re: Berry Box - The Transparent Case

Wow! I was off by a factor of about 150.   How is this calculated?   How many parallel floating point circuits does it have?   Is there a good description on the inner block diagram of the chip somewhere on the WEB?

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Thanks Jeff, be nice if we made it

@Jim and rrmcbeth

GPGPU has been discussed quite a lot on these forums, the general concensus is that there is no suitable software platform to do real GPGPU on the raspberry Pi. And unless broadcom decide to implement it, we probably wont get one.

GPGPU is still possible, but it is limited by what you can do with OpenGL ES. For real scientific computing you really need double precision as well. Again its possible to achieve double precision with single precision hardware through some clever maths, but it severely reduces the efficiency...

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Hey all,

Our Raspberry Pi arrived this week. With some minor modifications our prototype fits like a glove!

We've also been busy carrying out simulations of the injection moulding of the Berry Box. Stay tuned for some pretty pictures and some info!

tumblebomb
Posts: 50
Joined: Sun Nov 27, 2011 4:56 pm

### Re: Berry Box - The Transparent Case

Hi Bruce,

This is a bit of tangential question (don't know if that word works but it sounds good). If the crowd source project falls through (god forbid) maybe there could be a 3D printing option setup with one of the shops online so people may still be able to get the a same/similar designed case ?

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Hey tumblebomb

If crowdfunding fails, we will reveal our contingency plans

By the way, our website went live today, check it out at http://www.berrybox.co.uk

Bruce

Ferret141
Posts: 16
Joined: Sun Mar 11, 2012 2:47 pm

### Re: Berry Box - The Transparent Case

Can't say LEGO?

"Compatible with popular Danish building blocks"

bruceberry
Posts: 28
Joined: Fri Mar 23, 2012 4:27 pm

### Re: Berry Box - The Transparent Case

Yes, we were advised not to mention it directly.

So how about a competition, how many ways can you find to say *that* word without actually saying it...

arm2
Posts: 253
Joined: Thu Dec 15, 2011 3:46 pm

### Re: Berry Box - The Transparent Case

Sorry if I'm missing the obvious, but what about it is L### compatible?

jbeale
Posts: 3856
Joined: Tue Nov 22, 2011 11:51 pm
Contact: Website

### Re: Berry Box - The Transparent Case

The photo shows the new case connected by four screws to a framework on wheels, which might be part of a L*** kit (?)

pygmy_giant
Posts: 1562
Joined: Sun Mar 04, 2012 12:49 am

### Re: Berry Box - The Transparent Case

If crowdfunding fails it may be just because your timing's off – float it again in a few months when there are more Pis in the wild and you might get more interest…?

I hope you are suitably proud - I'm tempted....

Lob0426
Posts: 2198
Joined: Fri Aug 05, 2011 4:30 pm
Location: Susanville CA.
Contact: Website

### Re: Berry Box - The Transparent Case

This is the most unique case I have seen so far. might not be too practical for most but it does have its appeal. It is on Ebay.

http://www.skpang.co.uk/catalo.....0001_2.jpg
512MB version 2.0 as WordPress Server
Motorola Lapdock with Pi2B
Modded Rev 1.0 with pin headers at USB

http://rich1.dyndns.tv/
(RS)Allied ships old stock to reward its Customers for long wait!

Danbury Shakes
Posts: 15
Joined: Thu Apr 12, 2012 8:41 am

### Re: Berry Box - The Transparent Case

Nice work on the case.

Using a numeronym it could be it has L3 or L2O connectivity

markb
Posts: 124
Joined: Thu Nov 17, 2011 8:09 am

### Re: Berry Box - The Transparent Case

I seem to remember a Simpson's episode that involved a visit to 'BlockoLand". Surely you could state that the the Berry Box is 'Blocko' compatible?

Ferret141
Posts: 16
Joined: Sun Mar 11, 2012 2:47 pm

### Re: Berry Box - The Transparent Case

Maybe Mega Blocs will want a piece of the action.

davesedar
Posts: 31
Joined: Mon Mar 05, 2012 3:41 pm

### Re: Berry Box - The Transparent Case

bruceberry said:

Yes, we were advised not to mention it directly.

So how about a competition, how many ways can you find to say *that* word without actually saying it...

according to google translate it is  "????"   in Belarusian,

which looks kind of cute,

as the first character looks like the symbol for "pi".

what's the prize?

Ravenous
Posts: 1956
Joined: Fri Feb 24, 2012 1:01 pm
Location: UK

### Re: Berry Box - The Transparent Case

bruceberry said:

So how about a competition, how many ways can you find to say *that* word without actually saying it...
I suppose various puns are possible on "Let Go", "Legion", etc...

pygmy_giant
Posts: 1562
Joined: Sun Mar 04, 2012 12:49 am

### Re: Berry Box - The Transparent Case

you could say something like 'our L3-GO mounting system is compatible with market leading construction sets'.

Amazon don't mince their words – http://www.amazon.co.uk/100-Le.....0466KGRQ/2