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 Post subject: Replacing the tri sli GTX580 rig for
PostPosted: Sun Oct 27, 2013 8:41 am 
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Joined: Sun Sep 18, 2005 1:26 am
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Greets my folding friends it has come time to build a new PC and I am looking to do one thing extremely well: Folding

To that end I'd like to pick the brains of those who already know some answers.

I am not quite sure what my best avenue for configuration is going to be for maximum PPD Initially, before i started looking into price I was thinking a dual LGA 2011 system but seeing the server chip tax that is imposed i have a hard time imagining that can be made up for with bonus associated with the WUs that could be run. Am I wrong on this assumption? @ $2k/8 core cpu that sucks out a lot of money that I could otherwise drop on GPUs. I want to keep the motherboard/CPU/GPU cost between $3k-$5K and within that price range what are my options for maximum PPD/$?

I am leaning hard towards a (1x)LGA2011/4930K/(3x)GTX780 Ti. Would it be better to go dual six core CPUs and some lesser GPUs? I'd really prefer to keep it as close to $3k for the combo as possible.

Basically, I'd like to know opinions on how to optimize the purchases within the budget


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 Post subject: Re: Replacing the tri sli GTX580 rig for
PostPosted: Tue Oct 29, 2013 5:34 am 
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Joined: Mon Jun 15, 2009 12:50 pm
Posts: 891
Location: WI, USA
If you're paying for power, go 4P with the AMD Opteron 61xx that has the most cores that you can get. The newer versions are getting close to the 61xx series as far as folding performance, but for the $$, they are still the best bet (last time i checked). The entire rig should pull from 500-800 Watts or so depending on setup. Look over at [H] (HardForum) for most of the best information on 4P rigs. $3k - $5k on the rig should get you around 300k-800k PPD.

If you're not paying for power, look into the Radeon R9 290X or 7970 (as well as the nVidia 780 (Ti); maybe some 690 action?) The 780 just dropped $150 in price, so they are likely a pretty good deal. The Ti should be around $50-80+ of a premium on that, I'd guess. The new high-end GPUs should pull around 300-350 Watts each and the rest of your rig will likely pull around a max of 200 Watts. Looks like the 780s are getting in the neighborhood of 150k-180k PPD each (netting around 500k-600k PPD total with a CPU).

If money is no object, go with a 4P Intel setup if you can actually afford it, but an Intel 2P setup would be great too (two Xeon E5-2660 v2 look good - 10 core/20 threads each). Throw in some nice GPUs and you have a good monster too!


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 Post subject: Re: Replacing the tri sli GTX580 rig for
PostPosted: Tue Nov 05, 2013 8:43 am 
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Joined: Mon Jun 15, 2009 12:50 pm
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Reportedly, R9 290Xs are getting around 150-160k PPD on Win 7-64 (win 8 seems to be doing worse).

I dug up an example build that I was contemplating a while ago using a 4P Opteron rig. I was going for best PPD/Watt using Opteron 6166HE CPUs (85 Watt TDP). I would guess that the entire rig would draw ~620 Watts max or so. The guesstimated PPD would be around 450k-550k PPD (those are older numbers, so you may wish to inquire on updated numbers -- 700 PPD/Watt to 900 PPD/Watt based on the old numbers). To compare this with what I'm currently getting, I get around 285 PPD/Watt (based on 120k PPD @ 420 Watts).

The breakdown on the 4P Opteron build:
Mobo: $600-$720
CPUs: $1600 (4x Opteron 6166 HE)
Memory: $200 - $440 (1.35 V server memory)
PSU: $100 - $120 (800-1000 Watt gold or platinum 80+)
HDD: $40 or whatever is lying around
Case (if needed): $100ish
OS: Linux of some sort

Total: $2640 - $3100


You may wish to look into the newer 6366HE CPUs or the sometime forthcoming 64xx series of CPUs as well. I do know that the 6366 CPUs should be around $550 or each so, but do have 16 cores as opposed to the 12 cores of the 6166HE CPUs, but you'd be much better off getting actual information on how the newer chips actually fold.


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