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Advantages of I7 over i5

Discussion in 'What Notebook Should I Buy?' started by KayC, Dec 1, 2011.

  1. KayC

    KayC Notebook Consultant

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    Is i7 really that much better than the i5? If it is what are the important differences
     
  2. idiot101

    idiot101 Down and Broken

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    Core i7 has more cache than the Core i5. It performs faster due to that. It turbos to a higher frequency. But these are visible when you do something CPU intensive. Otherwise, it is not noticeable by the normal user.
     
  3. KayC

    KayC Notebook Consultant

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    So like a normal user like me, who doesnt know crap about computers, wont know the difference between the two, even when i play games?
     
  4. idiot101

    idiot101 Down and Broken

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    Games played at lower settings do not push the processor the same way as when done at higher settings. Plus, I would recommend you go in for a faster processor if you are playing games like Civ 5, WoW, LoL, Crysis 2, etc as they like fast processors.

    A gamer is not a normal user. IMO, you are far from one since you are asking the relevant questions that affect you directly.

    P.S Please correct me if I have named the wrong games.
     
  5. KayC

    KayC Notebook Consultant

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    hahah oh! Okay i guess i am going with the i7. thanks idiot... dude!
     
  6. Fat Dragon

    Fat Dragon Just this guy, you know?

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    I'm not 100% certain if this remains true in the Sandy Bridge generation, but in the former generation of i-series processors, a higher-end i5 CPU would outperform a lower-end i7 on many tasks that couldn't take advantage of the multiple threads/cores of an i7. The argument might be made that by now most programs/games that really need the CPU power will be able to take advantage of the quad-core versus the dual-core, but it's something to consider. If you're looking at the i7-2620m (dual-core) versus an i5 though, the i7 will always win, since it works in the same way (i.e. fewer, higher-clocked cores/threads) but better.

    As far as games, if you're a Rockstar fan or an RTS person, definitely go for a quad-core processor - Rockstar's PC ports have recently been infamous for poor, CPU-intensive porting, and RTS games are heavy on CPU-dependent calculations such as AI.

    In the end, though, a Sandy Bridge i5 is still a pretty bad-a chip compared to what most people are running in their own machines, so if that makes the most economical sense for you now, it could certainly be worse.
     
  7. elseven

    elseven Notebook Enthusiast

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    If you think you will ever need rendering speed (such as video editing) go with an i7 if your budget allows.
     
  8. Gamer872

    Gamer872 Notebook Evangelist

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    Just buy the i7 2600k lol. Most gaming machines use that as their brain. If you can't afford it then I would go with a lower i7 or an i5-something. I thought the i5 was quad-core as well though. What is that i5 that has the K in its name? That's the one I would buy. As for games, Starcraft 2 is probably a great example of a processor intensive game. Crysis 2 or Metro 2033 are more graphics intensive. Depending on which you are, I would decide from there.
     
  9. hockeymass

    hockeymass that one guy

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    The i5-2500k. But those are desktop CPUs.
     
  10. imglidinhere

    imglidinhere Notebook Deity

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    Your theory is a bit flawed when it comes to games using the i7 better than the i5 here. There were benchmarks with two identical laptops, same GPU different CPU, to see if the i5 was actually slower than the i7. The GPU used was the GTX 560M. It turns out that the i5s were just as fast as the i7s. The addition of more cores/threads didn't help much for games that only used four cores, I.E. hyperthreaded dual cores.

    A gamer is considered a normal user here. A workstation or engineer is not a normal user and will require more power in his/her laptop. If you have something like a GTX 560M, the i5 2430M will be plenty powerful for you, if you have anything above that, I.E. GTX 570M or faster, then the i7 2670QM would be your best bet.
     
  11. SlickDude80

    SlickDude80 Notebook Prophet

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    another scenerio is dual GPU setups like SLI or crossfired laptops...the i5 in this case might be a bottleneck

    But for everyday, there is no noticeable difference...UNLESS you are running something specifically using 4 cores/ 8 threads, you won't notice a difference in real world usage (that is...not benchmark)

    A very optimal setup is a fast dual core sandy bridge processor and a beefy vid card...however, most laptops with beefy vid cards come with quad core i7s
     
  12. Gamer872

    Gamer872 Notebook Evangelist

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    Sorry, I thought he was talking about replacing the CPU in his desktop facepalm. Sometimes I can't believe how dumb I sound.
     
  13. gwilled

    gwilled Notebook Deity

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    All those Gs you pull in that F-22 are getting to your head.
     
  14. Mitlov

    Mitlov Shiny

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    As for gaming--If you have something along the lines of a 540M or 6630M as your GPU, don't worry about i5 versus i7 for gaming purposes, because your GPU is going to be the bottleneck regardless. If you've got a 560M or better, then an i7 is probably worth it.
     
  15. Fenom96

    Fenom96 Notebook Evangelist

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    The 2nd Generation Intel Core i5 2600K is a quad core processor.
    The 2nd Generation Intel Core i7 2600K is also a quad core processor.

    - The only difference is that they're different cache sizes, which means that the i7 is considerably faster than the i5.

    - By the way, this should belong in the hardware section of the forums. Not the 'which laptop should I buy' section...
     
  16. KayC

    KayC Notebook Consultant

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    hahaha woops i am still new to this site

    So i am looking at a 540m and a radeon 6770hd, so you guys would recommnd the i5 right? Since there is not much different with these gpus?
     
  17. Gamer872

    Gamer872 Notebook Evangelist

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    i guess so, I might just need to change to a Ferrari or something.
     
  18. idiot101

    idiot101 Down and Broken

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    Information about this is really hard to come by. I have tried looking for reasons for you to invest in a Core i7 and I found none. The articles I used to make the first post were with respect to the architectures that came before SB where cache directly affected the performance. But SB is a completely reworked CPU technology that screwed up all those explanations. So I will try to summarize what I read.

    1. Intel SB is a much more efficient CPU for gaming.
    2. Many games run better on multiple cores. But because of hyperthreading, that shouldn't be a problem.
    3. Finally, the cost of the part is the only thing you need to see.

    Go with the core i5. A penny saved is a penny earned.

    P.S.... There are game developers who have made great strides in utilizing HT in their codes. I am putting this out before you guys taze me.

    P.P.S. Just wanted say that IB is going to be even worse in explaining which part to go for.
     
  19. 7_ShininGAngel

    7_ShininGAngel Notebook Enthusiast

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    An i7 Quad Core ain't that expensive on notebooks these days, pretty standard actually. I would just go for it. There aren't much apps that take the real advantage of 4 cores, but believe me, in future, newer apps and games will.
     
  20. dante316

    dante316 Notebook Consultant

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    Yeah it all comes down to price/performance. I need my laptop to be a workstation too, $50 more for a 2670 was worth it. No reason for the CPU to be the bottleneck when CPUs are so cheap nowadays.
     

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