i7 4790k Vs Fx 8350

Discussion in 'Processors and motherboards Intel' started by nz3777, Jul 24, 2016.

  1. nz3777

    nz3777 Ancient Guru

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    Hello I was hoping maybe someone can explain the diffrence bewteen these two Prossesors, I use to own a Fx 8350 and cpu-z would show it as a 8-core /8thread my 4790k on the other hand says 4-core/8 -thread so I would like to know which one is the (REAL) 8 core here and howcome the i7 dosent say 8-core/8 thread like the 8350?

    Thank you guys. Nz:)
     
  2. Agent-A01

    Agent-A01 Ancient Guru

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    Neither are *real* 8 cores. i7 is 4 cores with 4 virtual cores.

    8350 is 4 cores + 4 fpu 'core' that shares resources with the 4 real cores
     
  3. Dch48

    Dch48 Guest

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    Wrong. The i7 is four cores with a possibility for another 4 virtual cores.
    The 8350 is 8 physical integer cores paired up with 4 floating point units. It has 4 "modules", each containing two discrete integer cores and one shared floating point unit. It is an 8 core CPU where the I7 is a quad.
     
  4. Agent-A01

    Agent-A01 Ancient Guru

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    My mistake. 8350 is 4 real cores + 4 integer cores that is lacking FPU, it shares resources with the 4 real cores.

    Still not a true 8 core.
     

  5. nz3777

    nz3777 Ancient Guru

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    Little confused still sorry- lol. They both state they are 8 thread cpus but the part I am not understanding is why i7 says 4 cores and Fx says 8 cores.

    I guess if I knew how cpu's work This would not be so complicated to understand/ Did not mean to start a flame war.
     
  6. nz3777

    nz3777 Ancient Guru

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    Thread/core is basicly same thing or no?
     
  7. Agent-A01

    Agent-A01 Ancient Guru

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  8. Dch48

    Dch48 Guest

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    An FPU is not a requirement to be considered a core. It may not be a traditional 8 core but it is a real one.
     
  9. nz3777

    nz3777 Ancient Guru

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    Thank you (agent) as well as other guys who posted.It just hit me the other day I was looking at cpu-z and noticed my previous Fx was 8/8 my 4790k 4/8 which led me to investigate this further.:stewpid:

    Thank you for that article- I understand a little more now yet wondering when the time comes what (cpu) will be a good upgrade for my 4790k? 6950x is obviously out of my budget.:)
     
    Last edited: Jul 25, 2016
  10. Agent-A01

    Agent-A01 Ancient Guru

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    Quit splitting hairs.

    The majority of CPUs come with 1 integer + 1 FPU per core.
    An 8350 version with 8 integer + fpus would be considerably faster than the current in many scenarios.

    It deviates from the norm, therefore i say its not a true 8 core.

    Depends on your workload. For gaming, no need to upgrade for a while. That CPU will be fine until 2020~. Maybe by then games will be multi threaded correctly
     

  11. SHOCKTRUPPEN

    SHOCKTRUPPEN Banned

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    Cpu

    In regards to upgrading from 4790k, IMHO you won't need to upgrade your cpu until 2018 when both companies will put out new cpu's to look at. I currently have the 4790k and oc'd to 4.7 it is 25% faster (at stock speeds) than a 6700k. Why spend money on a cpu that still keeps up with current I7's? Spend your money on a better gpu, if you are a gamer, and or ssd etc around your current cpu. DDR4 memory doesn't blow DDR3 memory out of the water so why bother? I'm sitting tight until 2018 then I'll take a look around and see whats the new king of the hill with a new cpu. Regards.:)
     
  12. jura11

    jura11 Guest

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    Hi Nick

    Personally I would keep i7-4790k for while,if you can just up to OC 4.6GHz or 4.7GHz and you should be OK for quiete while there,if you are mainly gamer,at moment most of games are not using all cores

    I've compared few CPU in few benches and difference is very small,I do renders and due this I've 5820k and 2683v3 which I use,there those CPU are lot faster than 4790k or 6700k

    Hope this helps

    Thanks,Jura
     
  13. nz3777

    nz3777 Ancient Guru

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    Well I am still (kinda) stumped as far as cores/Threads are concerned,I do not know how the inner-workings (work) like you guys do obviously.

    From a performance point of view now that I spent some time with the i7 I can say for sure it is Faster,Better at gaming-(much better actually), uses way less power,has more overclocking options-So many in fact that I do not know where to even begin lol.Amd on the other hand is a much more Simplistic platform that uses brute-power but still has its place in the mid/Low end tier in my opinion.

    Once I am ready to upgrade would be cool to get something like a 5960x or 6950x but only for bragging rights,Nothing else. Thanks again guys.Nz
     
  14. jura11

    jura11 Guest

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    Hi Nick

    As many would say,is down to IPC which is quite poor and they're build on older architecture...

    Cores/threads matter if programs or games can use them,in gaming or in genral using PC multi threading doesn't matter to some degree

    Regarding upgrading,all depends what are you do and then I would upgrade,looks like DX12 will use more cores/threads and many SW using or they supports Multi threading

    Hope this helps

    Thanks,Jura
     
  15. thatguy91

    thatguy91 Guest

    No, a core is a physical contruct in the CPU, a thread is merely a processing chain. Traditionally you can only run one processing chain (thread) on a core. Think lemonade passing through a pipe as a single thread (the lemonade) through a single core (pipe). Now traditionally, when there are more threads than cores, the pipe needs a brief flush then switch to cola, before switching back to lemonade. Also, the flow of lemonade or cola may not be meeting the capacity of the pipe due to the supply. What hyperthreading does is effectively create a partition in the pipe, so lemonade can flow on one side and cola on the other side. You still only have one pipe (core), but now you can simultaneously get through both lemonade and cola (two threads). However, the pipe (core) can still only flow the same amount of fluid, however because both fluids are flowing simulatenously you better utilise the capacity of the pipe (core). Even though both lemonade and cola can't flow to the maximum that the pipe allows, when running both simulatenously (albeit slower), you get to use the maximum of the core, plus you don't waste time flushing the pipe.

    That is an analogy of thread vs core, and hyperthreading. Now, the FX 8350 has 8 individual pipes, not the 4 with the partitions, however the pipes are much smaller so you greatly reduce the amount of lemonade and cola that can flow at any one time. For mixed drinks (FPU), on the FX-8350 you can only flow four at a time, as you only have 4 pipes, not the 8 as for the individual drinks.
     
    Last edited by a moderator: Jul 26, 2016

  16. kegastaMmer

    kegastaMmer Guest

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    the analogy was helpful. thx
     
  17. nz3777

    nz3777 Ancient Guru

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    That was very helpful and very well put I may add! Thank you for breaking it down and explaining how it works.:)
     
  18. rogue221979

    rogue221979 Master Guru

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    Very well explained thatguy91. Going to copy this analogy if you don't mind.

    Can you explain women by any chance? :p
     
  19. Extraordinary

    Extraordinary Guest

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    G3D is the core
    These are the threads

    :D
     
  20. Undying

    Undying Ancient Guru

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    [​IMG]
     

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