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post #21 of 25
Quote:
Originally Posted by the_beast View Post
fold in a VM set to low priority - that way if it crashes etc it won't affect anything else, and won't slow anything down.
Some vm's e.g vmware limit the number of threads you can use, 8 in vmware's case. Thus if you have a server with for example 32 threads @ 2.0GHz you won't be able to fold bigadv in a vmware vm, because 8 threads @ 2.0GHz isn't enough, even though if you were folding all 32 @2.0 you'd be fine.

Because dual/quad cpu server's are generally more than 2x/4x the cost of uni processor machines, there is usually a lower ppd/$ associated with them. You can fold bigadv on a 2600k, and until that changes or unless you're getting a huge bargain on 2nd hand servers there is simply no point in buying dual/quad cpu servers just to fold. If you already have one or need one for other tasks that's a different matter.
     
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post #22 of 25
Quote:
Originally Posted by stren View Post
Some vm's e.g vmware limit the number of threads you can use, 8 in vmware's case. Thus if you have a server with for example 32 threads @ 2.0GHz you won't be able to fold bigadv in a vmware vm, because 8 threads @ 2.0GHz isn't enough, even though if you were folding all 32 @2.0 you'd be fine.

Because dual/quad cpu server's are generally more than 2x/4x the cost of uni processor machines, there is usually a lower ppd/$ associated with them. You can fold bigadv on a 2600k, and until that changes or unless you're getting a huge bargain on 2nd hand servers there is simply no point in buying dual/quad cpu servers just to fold. If you already have one or need one for other tasks that's a different matter.
8 cores (not threads) might be enough to manage a -bigadv, but that isn't really the point (remember this is for a work server, so it may well need the cpus for other things for much of the time anyway). If he uses a VM he can fold because he doesn't have to worry about stability. If he folds on the native OS he risks crashing or slowing down the server - meaning he can't take the chance, which results in no folding done at all. SMP on 8 cores using the idle clocks is better than trying -bigadv, causing a problem and being stopped from folding altogether as a reslt.
post #23 of 25
Quote:
Originally Posted by stren View Post
Some vm's e.g vmware limit the number of threads you can use, 8 in vmware's case. Thus if you have a server with for example 32 threads @ 2.0GHz you won't be able to fold bigadv in a vmware vm, because 8 threads @ 2.0GHz isn't enough, even though if you were folding all 32 @2.0 you'd be fine.

Because dual/quad cpu server's are generally more than 2x/4x the cost of uni processor machines, there is usually a lower ppd/$ associated with them. You can fold bigadv on a 2600k, and until that changes or unless you're getting a huge bargain on 2nd hand servers there is simply no point in buying dual/quad cpu servers just to fold. If you already have one or need one for other tasks that's a different matter.
You also have to consider power consumption (unless you get free power). I'm debating this now.. since the initial cost of a 48core opty will be equal to about the price of 7-8 full i7 2600k rigs. They will produce about the same ppd (roughly). The difference would be in the amount of physical space taken up by 7-8 i7 2600k rigs, and that the i7 rigs would use roughly 3.5x the amount of power to achieve the same results. After a month or two of electrical bills, you'd be worse off. Plus a nice little 1U/2U rack with 48cores stashed in the garage cabinet or somewhere far away would be a lot better than a bunch of i7s.

We're talking extremes here though... not to mention if stanford changes policy and allows only 8 real cores to fold bigadv... all your i7s would be worthless in that sense. though its never smart to buy parts literally just for folding.
post #24 of 25
I've been folding 24/7 on my primary business process server since October. Not once have I been able to detect or even hint that anything was going on. I have seen no difference between a load of 0.00 & 5.00. My server is run by a 1055t clocked in the low 3ghz area.

The only way i have issue with folding is if a bunch of gpus heat up everything else... Or if you overload your apc or breaker. I really appreciate cpu folding.

Chris
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post #25 of 25
I'm running two older Opterons on an Asus K8N board, they don't get good PPD, but the whole setup was under 200.oo. I'm saving up for a new mobo to run 4xxx AMD CPUs on this Asus mobo :

http://www.newegg.com/Product/Produc...82E16813131670
http://www.newegg.com/Product/Produc...82E16819105280
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