Hope I'm not too early on this event, but I'm as eager as can be.
This is Prime Grid's Winter Soltice Challenge, and the last one in the Challenge series for 2014.
This goes from 18-21 Dec and mind the odd start time again: Dec 18 23:03 to Dec 21 23:03 (UTC)
What we have here, is PPS (Sieve) and one very special thing with this one, you can crunch with GPU.
I say you can... but both CPU and GPU are supported.
I took both of them for a spin, to see what we was up against.
There is a huge time difference on those two WU's.
 
Here's a word from yodap from last Challenge

yodap
Don't forget, the last challenge of the year should be right up our GPU alley. PPS-Sieve. Nice short WU's that bring a hefty point package.
I want to to hear some coil whine from everybody!

 
And hefty point packages those GPU Sieves give. That is, if you do the GPU Sieves.
Just look at this:

Notice the Run times.
One Cuda PPS takes 8mins, while a CPU PPS takes 26hrs. (GTX980SC/ i7 5960x @3,5Ghz)
And they deal the same credit.
Some might take this into consideration before choose what road to take.
If you want to run GPU only, your PG preferences should look like this:

 
Important to deselect CPU in your pref, or you will be flooded with 30hr wu's.
 
The CPU wu's runs pretty cool and nice:

My max temp barely reached 80c
While the GPU temp look like this:

And yes... I broke down and got a EVGA 980SC
 
I was hoping someone would do a HT on/ off run for comparison, and tell us about it.
 
With our last GPU challenge in mind, I've got high hopes for us and EVGA as a brand name on this one.
Ok guy's, good luck, and let's give'm all a bad slam attack.
 

Can't wait 

Orange_1050

bcavnaugh
Best you use the 980 under the TZC

Aww.. That hurt
Tell you what.. Next TZC I'll bring both
 

Sorry, I thought you still Folded and was part of this last TZC.

I'll have to dust off my amd card and see if I can get it crunching.  I always seem to run into problems with boinc and GPU's. 

90 minutes to the start! Downloading early does the team no good.

Downloading now

What's everbody OC'd at?
 
Here's my stable numbers:
 
780 SC: 1188Mhz - 8 Minutes
760 SC: 1267Mhz - 10.25 minutes
650 Ti: 1306Mhz - 16.5 Minutes
 
For the power/core comparison the 760's just stomp all over this project 

Good! We'll get a head start against your juggernauts! 
 
We dropped back to 4th, but just busted 1 Millions points in 2 hours! Keep up the good work everybody!

 good stuff
 

Orange_1050
Finally, after 7 1/2 hrs, I'm fully up and running.
I'm very happy to see all the EVGA names on the list.
With 108 teams, and 440 participants, I find 4th place more than acceptable.
Some of the teams in front of us, has a couple of dudes, whom I suspect dispose a tad more GPU power than the average gamer
We have a couple of exiting days ahead.
 
Crunch hard teammates and may the force be with you 

Back up to 3rd thanks in large part to you. Awesome as usual.

I finally got my HD 7870 running after some annoying obstacles.  For some reason my Asus 2P workstation board wouldn't recognize it, so I installed it on my bench system for this challenge.  It started out around 21-22 minutes per WU, but after messing with the clocks this morning it is down to around 20 minutes each.  Not great compared to all your fancy newfangled GPUs, but better than a poke in the eye with a sharp stick.

After watching things for a bit I have to think I will hit the mark for the PPS Sieve Turquoise badge before this is all over. Any one else close to their next PPS Sieve badge?
 

2 Mill for Turquoise not sure if ill make that by the end of challenge.

I count 16 playas so far. Believe it's record! 
Tomorrow I'll start listing you all

 Rank 3 Crunching@EVGA 29570412.00