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Bigadv folding vs GPU (Fermi) folding

post #1 of 12
Thread Starter 
Hey guys,

Need a couple of questions answered as soon as possible please.
1) Which is more efficient (powerwise and in terms of PPD)? i7 bigadv vs a GPU farm with multiple GPUs such as GTS450s. For multiple GPUs, does it depend solely on the choice of certain cards?

2)What about 24/7 folders? Would the situation apply to them?

Thanks in advance. I need it for an essay due tonight.
    
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post #2 of 12
bigadv is going to be superior for price per watt and price per PPD... overall, currently, bigadv is the way to go if you're going to be starting a 24/7 farm (for the most points).
 
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post #3 of 12
Thread Starter 
Plain and simple, the i7 remains the folder's choice? Nothing can compare with it competitively? Need a bit more input and a few more responses.

Oh, what about people who fold with a GPU farm? Why would they go that route then? Are they dying out and converting to bigadv folding?
    
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post #4 of 12
Quote:
Originally Posted by intelfan View Post
Plain and simple, the i7 remains the folder's choice? Nothing can compare with it competitively? Need a bit more input and a few more responses.

Oh, what about people who fold with a GPU farm? Why would they go that route then? Are they dying out and converting to bigadv folding?
GPU folding is also very necessary as it can do some certain tasks much much quicker than cpu. The people who decide to fold gpu farms don't care about points but rather the project itself.
    
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post #5 of 12
As far as PPD/watt a dedicated i7 rig folding -bigbigadv cannot be beat. With a rig that costs roughly $700-1000 you can get as much as 90k ppd. Once you start to get lots of gpus running though they generate tons of heat and electricity can get very expensive. If electricity and heat are not an issue than gpu folding is not a bad option but cpu bigbigadv folding would still be more cost efficient as far as the points you would be getting. Hopefully that all makes sense.
post #6 of 12
Advantages of a GPU farm:
• More consistent output; a few WUs every hour, compared to a single -bigadv every few days.
• Less volatile; failing one GPU WU means you've lost an hour of work, and maybe 1.3k points. Compared to two days work on a -bigadv, and 60k points lost.
• Less need for an OC; a stock GPU performs well on it's own. CPUs for -bigadv require moderate OCs, which CPUs for -hugeadv require even more.
• More flexible for systems; CPUs need an entire rig around it, while GPUs can usually slot into another rig with ease.


Disadvantages:
• Overall, less PPD. Certainly less PPD/W.
• Ignoring PPD/W, the power consumption itself is quite high.
• A lot of heat. Find in the winter, but nearly unbearable in summer.

Probably others too, but it's late.
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post #7 of 12
Zodac nailed it but in my words,GPU folding allows me more freedom as in fold some WU's then stop when it is hot or noisy and the point that all types of WU's need to get done,not just the high point producers is very valid. If you are writing a paper perhaps you point out how folding is a fun way for people to get more competent with their equipment and operation of the computer as you do have to dowload files,configure the application and at times troubleshoot problems.You must develope the skills to tell when things are not working correctly.
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post #8 of 12
Thread Starter 
Thanks everyone, especially Zodac, for the quick and informative responses.
    
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post #9 of 12
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post #10 of 12
Quote:
Originally Posted by robwadeson View Post
GPU folding is also very necessary as it can do some certain tasks much much quicker than cpu. The people who decide to fold gpu farms don't care about points but rather the project itself.
This exactly. Points are cool and all, but GPUs aren't going to be, nor should they be phased out by CPUs just because of some imaginary points you get faster for less power than a CPU.

That being said, CPUs do important work as well, it's just that GPUs can do some work LOTS faster than a cpu.

Either way you're contributing to research. you can't lose
    
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