Cores vs threads.

[HashtagMilk]

This is probably a nooby question, but can someone explain cores vs threads? First explain cores and then explain threads and then explain how they are different please. As simple as possible please.

[Feronix]

This should help

 

[Peter Vaughan Truslow]

cores are physically sovereign. 

threads are what the computer sees as cores

on a non "hyper threaded" CPU, 1 core is seen as the computer as one thread

on a "hyper threaded" CPU, 1 core is seen as 2 threads by the computer

[OriginalPromise]

Cores can be physical

Threads can be virtual.

Hyperthreading technology works by giving a physical core two threads, so it seems like the processor has double the amount of cores.

i7, 4 cores = 8

i5, 4 cores =4

[connorpiper]

Even faster than possible.

 

Intel Core i3 4150. 4 threads 2 cores.

Makes the game/software think that you have 4 cores. 

Basically runs 4 virtual cores on a 2 core CPU.

Core i7s are just i5s with hyperthreading (In the 1155 and 1150 area)

[Peter Vaughan Truslow]

I love how so many of the common questions are so well answered by their "FAP" videos

[thekeemo]

I have a question will hyperthreading effectivly work like 8 physical cores?

[Hieb]

I have a question will hyperthreading effectivly work like 8 physical cores?

 

No. You can think of a thread like a pipeline of information or instructions. A core is what does the physical processing of a thread.

The way hyper-threading works is by giving two threads to a single core. This allows more efficient overall processing of information since things can be put on an extra thread to be completed when the other thread the core is working on has a period of downtime, so it fills in the gaps with the other thread. Or it can pause one thread to work on stuff from the other.

 

The operating system treats it as 8 physical cores, but it's not as effective as 8 cores since the core can still only process one task at a time from one thread at a time.. it just makes it overall more efficient and capable of getting more done.

[Opcode]

I have a question will hyperthreading effectivly work like 8 physical cores?

It works in the same sense but doesn't scale as well as 8 logical cores.

[nick99n]

I love how so many of the common questions are so well answered by their "FAP" videos

explain "FAP" please 

[DirkW]

explain "FAP" please 

in this context "Fast As Possible"

[typographie]

I have a question will hyperthreading effectivly work like 8 physical cores?

 

All else being equal, 2 physical cores are faster than one Hyperthreaded core. A real core is a physical unit that has its own discrete set of resources that it does not share with other cores, whereas Hyperthreading is basically two threads running in a single core.

 

That being said, in the real world there are some really fast 4-core/8-thread processors and a few rather slow 8-core processors, so its hard to come up with a real-world model that demonstrates that difference objectively.