Would a computer with two mother boards crunch twice as many BOINC units, all else being the same?

Thanks,

Nick

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Hummmm... is a computer with 2 MBs not 2 computers?

I guess it would double the rate - nearly. Because it then had two CPUs and 2 times RAM, and these are the bottlenecks. HD access is no issue.

:-)= Greybeard

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All about BOINC: BOINC-Wiki (by Paul D. Buck)

Would a computer with two mother boards crunch twice as many BOINC units, all else being the same?

Thanks,

Nick

The short answer is yes.

Hummmm... is a computer with 2 MBs not 2 computers?

I guess it would double the rate - nearly. Because it then had two CPUs and 2 times RAM, and these are the bottlenecks. HD access is no issue.

:-)= Greybeard

How many mobos and CPUs does a super computer have?

Is there a computer with two motherboards? Or did you mean, one computer capable of take two CPUs?

The latter exist, I have never heard of the first one. That would mean a dual layer case, a lot of cooling (for all the fans), a lot of space (for all the cards) and a deskspace for at least 6 monitors if you had a Matrox P-650 videocard!

So with the latter, I'd follow j2's answer to yes. 2 CPUs on one motherboard. It's called a dual CPU motherboard.
Or you just take one motherboard and one CPU. Intel has CPUs which can do Hyper-Threading, meaning that the one CPU can act as if it's two.
AMD is now bringing out a Dual Core CPU, which is TWO CPUs on one CPU core, doing about the same as the Intel HTs.

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Hummmm... is a computer with 2 MBs not 2 computers?

I guess it would double the rate - nearly. Because it then had two CPUs and 2 times RAM, and these are the bottlenecks. HD access is no issue.

:-)= Greybeard

How many mobos and CPUs does a super computer have?

Howmany CPUs do you want?
64/128/256/1024 etc

Not really mobos though in the sense of PC mobos.
I think they're generally known as nodes, often configured more like a network than a multi-processor system. Each node generally has just processor(s) RAM and a 'network' interface, no disk controllers, no keyboard/video etc - useless for anything at all on their own.

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Is there a computer with two motherboards? Or did you mean, one computer capable of take two CPUs?

The latter exist, I have never heard of the first one. That would mean a dual layer case, a lot of cooling (for all the fans), a lot of space (for all the cards) and a deskspace for at least 6 monitors if you had a Matrox P-650 videocard!

So with the latter, I'd follow j2's answer to yes. 2 CPUs on one motherboard. It's called a dual CPU motherboard.
Or you just take one motherboard and one CPU. Intel has CPUs which can do Hyper-Threading, meaning that the one CPU can act as if it's two.
AMD is now bringing out a Dual Core CPU, which is TWO CPUs on one CPU core, doing about the same as the Intel HTs.

The predecessor to the pieces they currently call "blades" were single card mobos with CPU, RAM, blah blah. All fit in a single case .... you could call it a computer. In any case if you simply made a box, put two mobos with all the pieces on them including the CPUs, you would have the equivalent throughput of two CPUs. I do not know of any current PC vendor that does that, but it your built your own............

You'd still need two PSUs. Or a very powerful one with a splitter connector.

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How many mobos and CPUs does a super computer have?

Depends on the computer.

Most newer generation supercomputers use 1,000 or more PC class machines to work somewhat like the BOINC distributed super-computer, but the difference is that the collection of boxes are all in the same room, and they can and do communicate.

BOINC is a VERY loosly coupled super-computer architecture. These other supercomputers are also loosely coupled, but are more tightly coupled than BOINC.

NSF is concerned about the fact that we are not designing or building supercomputer that do NOT use "stacks" of PCs to make up the supercomputer. Quite simply, as effective as they are, loosely coupled supercomputers are not well suited for some computation problems. If you have a problem where the computation product one one node is of intense interest to "adjacent" nodes, the loose coupling can cause issues because of bottlenecks in the communications network.

With tightly coupled CPUs this is less of an issue because this is the type of problem supported by this architecture and will have speicalized communitcation connections.

I hope this answered your question. If not ... we can try again ...

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I have two PC's.

One has one AMD XP2000 CPU.

The other has two AMD MP2000 CPU's.

They both have 1Gig ram, or more.

The PC with two CPU's runs the same optimised EXE client at the PC with 1 CPU.

The PC with 2 CPU's gets through twice the number of WU's as the one with 1 CPU.

Once a long period of time has passed, a slight difference might be noticed. However at the moment single CPU PC does 7 a day, and Dual CPU PC does 14 a day. Give or take a small fraction...

IME.

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Foamy is "Lord and Master".
(Oh, + some Classic WUs too.)

How many mobos and CPUs does a super computer have?

Well - I didn't refer to supercomputers, as I think Nicholas didn't either.

:-)= Greybeard

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All about BOINC: BOINC-Wiki (by Paul D. Buck)