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Why can't you crossfire CPUs?

#1JonWood007Posted 10/20/2013 5:56:26 PM
So I was just thinking about this, and I'm curious why you can't crossfire CPUs like you can GPUs. Obviously, all crossfiring would do is give you two CPUs where you'd effectively double your number of cores, but I could see such a function becoming useful as PCs begin to age. I know with my phenom II aging and games beginning to use 8 cores, I would actually LIKE the idea of being able to crossfire a second 965 to give me extra performance.

So, why isn't there an option to do this? Is it impractical for some reason? Impossible? Just curious.
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#2LordSeiferPosted 10/20/2013 5:57:24 PM
http://www.anandtech.com/show/6533/
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^ this
#3DarkZV2BetaPosted 10/20/2013 6:07:07 PM
You can.
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#4ShubPosted 10/20/2013 6:11:16 PM
It's been done for years and years, you just need a CPU that supports it and a motherboard with more than one CPU socket. Such things are reserved to the world of servers and high-end workstations.
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#5YoungAdultLinkPosted 10/20/2013 6:14:50 PM
That's what the first dual-core CPUs were.

Intel stuck 2 Pentium 4s together and told them to work together. It didn't work particularly well.

AMD actually took one of their server CPUs and stuck them together. They were already made to work in tandem, so it worked rather well.
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#6Mr kittyPosted 10/20/2013 8:54:43 PM
There's the well known Xeon series used for work station that use a dual socket. The sad thing is most games still only use 2 core at best. I don't see the point of having dual octo core for playing consumer games.
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#72Dhas_a_MIGRANEPosted 10/20/2013 8:56:01 PM
Mr kitty posted...
There's the well known Xeon series used for work station that use a dual socket. The sad thing is most games still only use 2 core at best. I don't see the point of having dual octo core for playing consumer games.


And hyperthreading for 32 threads of gaming power.
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#8Orestes417Posted 10/20/2013 9:00:14 PM(edited)
To give you an idea SMP systems have been around longer the x86 chipsets. We're talking the 60s here. MLK being dead was current events when SMP systems were new.

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#9kyler45Posted 10/20/2013 8:58:57 PM
If this was a common thing, and it was easy, I'd do it in a heartbeat, however I feel there is a VERY small percent of Motherboards that will support it, or am I thinking about this backwards?
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#10Orestes417Posted 10/20/2013 9:01:49 PM
It's gone out of favor now that we have multicore chips and is only really used on server hardware these days. A good server motherboard ain't cheap
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