Computer Processing Speed based on Intel?

If a computer has an Intel i7 Gen 8 with a 1.8 GHz speed, but another has an Intel i5 Gen 8 with a 3.4 GHz speed, does that mean the i5 is faster than the i7?

3 Answers

  • 10 months ago
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    Not necessarily.

    It depends which version of each CPU is involved, and if they are laptop (low power) or desktop (full power) CPUs.

    Intel do not list an 8th generation i5 with a clock speed of 3.4GHz

    The only 1.7GHz 8th gen i7 in Intel lists is a laptop one, 15W power rating.

    The nearest i5 to 3.4GHz is the 3.6GHz i5-8600K which is a 95W CPU; they are simply not comparable as they do not work in the same types of machine. The laptop one is soldered in, the desktop fits a socket.

    If you go to a better comparison, the 2.4GHz i7-8700T which fits the same socket as the 3.6GHz i5-8600K but only takes 35W, the speeds are identical to within 1% of each other.

    Clock speed is simply not in any way a good indication of computer performance, regardless of maker, other than possibly with identical series and generation CPUs with the same core count.

    Look at the Passmark results for each CPU instead - that result shows real-world performance.

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  • 10 months ago

    It's worth noting that Intel's 6th, 7th, 8th and 9th Generation processors are fundamentally using the 6th Generation Skylake architecture. You could round up all of these 4 Generations, clock them to 4.0ghz, run a program that uses 4 threads, and they will all perform within a 1%-2% margin of eachother.

    There are 2 types of Speed to be concerned with, Single Threaded performance and Multi-threaded Performance. PC Games use a varying amount of threads and Games don't run work in parallel so most modern games need access to 6-8 threads with Higher Single Core performance. In one game a quad-core with 4 threads like the Core i5-6600k, Core i5-7600k, or Core i3-8100 will be able to keep up with the Core i9-9900k, but in another game the 4c/4t CPU will lose by a wide margin. AutoCAD is another program that uses a limited amount of threads.

    It's worth noting that there are still some PC games that perform slightly better if Hyperthreading is Turned off, but you need a CPU that has a sufficient amount of cores to pull this off, like the Core i7-8700k or mostly a Core i9-9900k. At this point the Core i9-9900k would be the same as the Core i7-9700k.

    With your Question all that can be established is the clock speeds because you did not list the model number of the CPU. I don't know if you're trying to compare a laptop part to a desktop part or what.

    Of course the 3.4ghz i5 is going to be faster in terms of Single Threaded performance but since no one knows how many cores and threads we're dealing with, no one can tell you how fast the multithreaded performance is.

    What matters the most is knowing the software you're going to use and how you're going to use it. A 12-core CPU is redundant if you're going to use software that works better with a 6-core or 8-core CPU that has a higher clock speed.

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  • 10 months ago

    Yes. However as a note towards cpus in general, clock speed isn't always the indicator of which is faster. How the cpu handles information during each clock pulse can make a slower clock speed cpu faster than one with a higher clock speed. Also there is core count to consider, where if you have software that can utilize multiple cores, then a slower cpu speed will outperform a single core cpu at a higher clock speed. CPU benchmarks is the easiest way to see who is faster at the single core level.

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