01/12 -> 05/12 : Collatz Conjecture - Complete

MacDitch · Post by **MacDitch** » Wed Nov 24, 2010 6:23 am

Name: collatz december race
Project: Collatz Conjecture
Issued by: wolfs team
Start time: 2010-12-01 00:00 GMT
End time: 2010-12-05 00:00 GMT

http://boincstats.com/bam/challengeChat.php?chid=115

MacDitch · Post by **MacDitch** » Mon Nov 29, 2010 3:01 pm

A quick heads up, there's just under a day and a half until the next Collatz Challenge...

Post by **aardvark** » Mon Nov 29, 2010 7:55 pm

Cache's at the readt chaps

Only problem is I can only buffer about 20 Hrs worth, but will give it a go.

Post by **Megacruncher** » Mon Nov 29, 2010 11:41 pm

I'll see what I can do! :)

Post by **Megacruncher** » Wed Dec 01, 2010 12:58 am

Early days yet - less than an hour gone - but with 139K (that's some caches) we are a good 3rd of 9 active teams. :wav:

Post by **Radio** » Wed Dec 01, 2010 7:47 pm

I've woken up for this one. I've been running the system off network for a couple of days on the project.

I noticed something about the credit gained on this one that seemed a bit strange.

65488519 28822557 29 Nov 2010 5:24:51 UTC 1 Dec 2010 19:25:58 UTC Completed and validated 2,321.98 132.43 0.79 776.77 collatz v2.03 (cuda23)
65488361 28822478 29 Nov 2010 5:24:51 UTC 1 Dec 2010 19:25:58 UTC Completed and validated 54,737.38 53,397.79 318.56 713.60 collatz v2.00 (sse)

Is it really the case that you get the same out of 900 hours of cpu time and 2 minutes of graphics card time?
Why do the claimed and granted credits differ so disproportionally?

PinkPenguin · Post by **PinkPenguin** » Wed Dec 01, 2010 9:39 pm

Yep! that's about how it goes - GPUs can crunch some kinds of work a lot (a helluva lot) faster than CPUs.

Claimed credits are calculated using only CPU time which is minimal if the work unit is run on a GPU.

Post by **Gary Mc** » Wed Dec 01, 2010 11:22 pm

Yes that is right. To be honnest is it really worth crunching with CPU for all the credits you get? I used to crunch on an old Dual core processor with my laptop until I realised the credits were not worth the electric bill.

MacDitch · Post by **MacDitch** » Thu Dec 02, 2010 8:42 am

Whatever you guys are crunching, you're doing it right!

We are currently in third place with the top five round-out as follows:

Russia 1 14,082,220
L'Alliance Francophone 2 7,078,507
The Scottish Boinc Team 3 2,190,844
Team China 4 1,814,502
AMD Users 5 1,708,705

Post by **Megacruncher** » Fri Dec 03, 2010 1:16 am

Gary Mc wrote: To be honest is it really worth crunching with CPU for all the credits you get? I used to crunch on an old Dual core processor with my laptop until I realised the credits were not worth the electric bill.

If your aim is to build a Boinc farm and charge up the team/country/world rankings then you really don't want a room full of laptops or indeed anything else without a top end GPU.

On the other hand while your laptop/basic destop is on anyway it might as well be running Boinc. But as you say it's not worth the 'lecky to leave it on just for Boinc.

Also whatever you stick your latest ATI or NVidia beast into is going to need a CPU and whether it is mighty or feeble it can add some credits. If you are on a tight budget then you might settle for something feeble but otherwise a decent CPU will add significantly to your tally.

Don't discount the contribution of CPU crunching. Yesterday, to pick a particularly glorious example, I lived up to my moniker and crunched 1,029K: 795K from DNETC; 156K from Collatz C; 78K from AQUA and other CPU projects. That's a useful 7.6%.

Most importantly most boinc projects only run on CPUs so, whether it's contributing to the science or beating others on those projects we need to use our CPUs.

Post by **aardvark** » Fri Dec 03, 2010 6:43 pm

I'm going to be offline until 23:00. Might be an opportunity for the Chinese team to catch up

The "croft" is getting a new case :)

Post by **Megacruncher** » Sat Dec 04, 2010 12:42 am

aardvark wrote:
The "croft" is getting a new case :)

Ohhh! Nice. I love upgrades, even non-crunching ones belonging to other people. Tell us all about your new case!

Post by **aardvark** » Sat Dec 04, 2010 1:38 am

Back online, success

Tell us all about your new case!

I'll let the toaster take up the story in the hardware section, he has a way with words

Post by **Radio** » Sat Dec 04, 2010 1:38 pm

I'm not getting any more collaz work-units down, is anyone else having the same problems?

Post by **Gary Mc** » Sat Dec 04, 2010 2:54 pm

My work units are coming in with no issues.

Post by **Megacruncher** » Sun Dec 05, 2010 2:39 am

No probs 4 me either!
Anyhoo we ended up a convincing third:

Russia ............................ 38,918,648
L'Alliance Francophone ..... 19,645,437
The Scottish Boinc Team .... 6,551,880
Team China ...................... 5,404,968
AMD Users ....................... 4,843,966

:wav: :wav:

MacDitch · Post by **MacDitch** » Sun Dec 05, 2010 12:12 pm

As Megacruncher posted earlier - we finished an amazing 3rd out of 17 for this challenge. :wav:

The rest of the top ten look slike this:
Russia 1 38,918,648
L'Alliance Francophone 2 19,645,437
The Scottish Boinc Team 3 6,551,880
Team China 4 5,404,968
AMD Users 5 4,843,966
BOINC@Heidelberg 6 1,316,348
Altairo Vejai, Lithuania! 7 304,743
St.Petersburg 8 90,525
wolfs team 9 83,503
SPORTING CLUBE DE PORTUGAL @ SETI 10 44,939

The Scottish Boinc Team

01/12 -> 05/12 : Collatz Conjecture - Complete

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