Which CPU is better in a laptop? The 6700HQ
or newer 8550U from Intel? We’ll find out in this video with a series of benchmarks
to see how they perform, and discuss the differences between them to help you decide which you
should get, or if it’s worth upgrading. I recently compared the 8550U against the
7700HQ in another video, and had a few comments asking to also compare it with the even older
6700HQ, so here we go! Late last year Intel launched their 8th generation
of mobile processors known as Kaby Lake R, which were a refresh of the 7th generation
known as Kaby Lake, rather than being Coffee Lake based. The mobile Coffee Lake chips are
on the way, but for now we’ve only got the U series and desktop processors, and 6700HQ
CPU is from the 6th generation known as Skylake. First let’s note the similarities between
these two mobile chips. Both have 4 CPU cores with 8 threads, which is the main reason that
I wanted to compare them, and both are based on a 14nm manufacturing process. That’s where the majority of important similarities
ends, so how do they differ? The main difference is that the clock speed of the newer 8550U
varies quite a bit, with a base frequency as low as 1.8GHz and a turbo boost up to 4GHz,
while the older 6700HQ has a 2.6GHz base and 3.5GHz turbo speed. This is because the 8550U
is a lower powered chip with a 15W TDP compared to the 6700HQ’s 45 watts, and its performance
greatly depends on how much power is being applied as well as the cooling solution. The
Dell XPS 13 which I’m testing with here is configured to use up to 25 watts though,
so in general it does perform better than many other 8550U systems. The 6700HQ also
has 6MB of cache, while the 8550U has a bit more at 8MB. So there are some interesting differences
between the two, mainly with the clock speeds and of course the power difference. How much
of a performance difference does this make practically? To test this I’ve run some
CPU specific benchmarks on two different laptops with these processors to find out. Both laptops are running Windows 10 with all
available updates installed on an SSD. The 6700HQ laptop has 16GB of DDR4 memory running
at 2,133MHz, while the 8550U laptop only has 8GB of LPDDR3 at 1,866MHz, so a small amount
of the performance difference may be due to this and is worth keeping in mind. Overall
the laptops aren’t too different in terms of specs, we should still be able to compare
the CPUs for the most part. In Adobe Premiere I’ve rendered my review
video on the ASUS Zephyrus gaming laptop, which goes for around 10 minutes at 1080p,
using the h264 high bitrate preset. No GPUs were in use for the test, these results are
CPU tests only. We can see that there’s a fair difference between the two, with the
6700HQ able to better handle sustained multicore speeds. Next i’ve used Handbrake to encode a 4K
video file to 1080p, and a separate 1080p video file to 720p, and in both cases the
6700HQ has taken the lead by over 10%. I’ve used Veracrypt to test the AES encryption
and decryption speeds, and in my testing the 8550U performed a fair bit better than the
6700HQ in both. The 7-Zip benchmark was used to demonstrate
the decompression and compression speeds of both CPUs, and interestingly although the
8550U was quite far ahead in terms of compression speeds, but it was a little slower when it
came to decompression. In Cinebench I’ve tested both single and
multi core performance, and as expected in the single core the 8550U is out in front
as the single core was able to reach 4GHz. Things change in the multicore results however,
as the 8550U had to downclock itself quite a bit to stay cool, resulting in the 6700HQ
performing better. Interestingly things change a bit in Geekbench4,
although the single core performance is slightly ahead as expected, the multicore performance
result here jumps ahead too, however this test doesn’t go for that long and doesn’t
really represent a sustained workload as some of the other tests better do. A similar result was observed in Passmark
9, where the single core score of the 8550U was a fair bit ahead, while in the multicore
test the results were much closer together. The Corona benchmark renders a scene using
the CPU, and it completed about 10% quicker on the 6700HQ, again because the 8550U was
downclocking itself under a full multicore workload over a longer period of time. So as with the 7700HQ comparison, the results
were a bit of a mixed bag, with the 8550U winning in single core performance as expected,
and in general losing in multicore performance, at least in the tests that I’d classify
as being more real world with workloads that run for a longer period of time rather than
short synthetic tests. The single core wins by the 8550U were expected,
owing to that 4GHz turbo boost, which is higher than the 6700HQ’s 3.5GHz, and it’s also
just a newer chip with other architectural improvements. In practice I found that the
8550U with all cores in use quickly thermal throttled to around 2.7GHz on all cores, at
least in this case with the Dell XPS 13 that I was testing with, which is quite thin and
doesn’t seem to be up to the job of running it flat out for longer periods of time. The Dell XPS 13 does use a 25W TDP, so the
CPU is getting more power, helping it perform better compared to other ultrabooks with the
standard 15W TDP. The thin form factor does seem to limit the results though. With proper
cooling the 8550U is meant to run at 3.7GHz on all 4 cores, making it a fair bit better
than the 6700HQ’s all core 3.1GHz boost. As a lower power chip it’s been placed into
a small laptop here, so there’s not enough thermal headroom to achieve maximum performance.
There were no issues running a single core at 4GHz with the 8550U though, which explains
why it’s ahead in many of the single core tests, but generally behind in the multicore.
With better cooling I suspect that the 8550U would come out on top in almost all cases,
due to that higher clock speed, however as a U series chip which is primarily going to
be used in much thinner laptops this may be unlikely. Based on these tests in most cases the 8550U
seems to offer some improvement, mainly in single core workloads. If you’re already
running a laptop with a 6700HQ there’s no real reason to upgrade to the 8550U, unless
perhaps you need to buy a new laptop anyway for other reasons, such as a requirement for
a thinner machine, or maybe you just really want that better single core performance.
I still use my 6700HQ laptop every day and it still performs perfectly fine for me, so
I’d probably only consider the change if I wanted to swap to a ultrabook style system. I haven’t tested the differences in battery
performance or temperatures, as both laptops have different sized batteries and different
cooling solutions it wouldn’t be a fair comparison. For the same reason I also haven’t
tested any games, as the 6700HQ laptop had an Nvidia card while the 8550U laptop had
no discrete graphics at all. So what did you guys think about the differences
in performance between Intel’s 6700HQ and 8550U CPUs? Although the main point of the
U series CPUs are to be low powered and allow for thinner and lighter laptops, the fact
that the 8550U was able to keep up and in many cases even beat the 6700HQ in some instances
was pretty impressive. I’d be interested in seeing what the 8550U can do in a thicker
laptop with better cooling, and I can’t wait to test out more 8th gen CPUs on the
channel in the future. Be sure to let me know your thoughts down
in the comments, and leave a like if you found it useful. Thanks for watching, and don’t
forget to subscribe for future videos like this one.

8550U vs 6700HQ – Laptop CPU Comparison and Benchmarks
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34 thoughts on “8550U vs 6700HQ – Laptop CPU Comparison and Benchmarks

  • March 31, 2018 at 10:01 pm
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    Awesome

    Reply
  • March 31, 2018 at 10:07 pm
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    Still concise and great video!

    Reply
  • March 31, 2018 at 10:10 pm
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    Nice and informative video! Glad to know that my old Alienware 15 R2 with a 6700HQ can still compete with newer chips in other laptops!

    Reply
  • March 31, 2018 at 10:12 pm
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    the most amazing thing for me is that the 8550U has almost the same performace than a 7700HQ for a third of the TDP. I cannot wait for what intel is going to have to offer with the new coffe lake HQ processors, or HH maybe

    Reply
  • March 31, 2018 at 10:20 pm
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    thanks for video and comparison

    Reply
  • March 31, 2018 at 10:33 pm
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    really would love to see r5 2500u vs 8550u

    Reply
  • March 31, 2018 at 10:41 pm
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    Hi Jarrod!
    I bought a Metabox laptop with Intel 7700HQ and GTX1070. It's running games great but it also overheating as hell, being frequently over 95° so there's no way I overclock it. Have you any tips to help me out with this situation? THANKS SO MUCH!!!

    PS. I already got cooling vacuum and a cooling table/stand.

    Reply
  • March 31, 2018 at 10:46 pm
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    keep it bro thanks

    Reply
  • March 31, 2018 at 10:50 pm
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    Give as information about AMD new Processors ! Those are very hard to know their performance !

    Reply
  • March 31, 2018 at 10:55 pm
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    Nice job !!!

    Reply
  • April 1, 2018 at 12:22 am
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    Are you a News reader? If not, you should be… Great work as always though…

    Reply
  • April 1, 2018 at 12:33 am
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    How can I get a metabox pc in the US? Would it be worth it?

    Reply
  • April 1, 2018 at 1:34 am
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    I can forgive how you say "H", but "CACHE" is pronounced "CASH"! Good review, by the way! I would go for the best cooling solution. If I wanted poor cooling, I would buy an Apple!
    Oh, as well, JuiceHead has news on the new Bethesda game "StarField" Guess his NDA was lifted!

    Reply
  • April 1, 2018 at 2:33 am
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    Your channel deserve to get Millions of subscribers ❤️
    Your videos are great and informative
    I hope to become your friend and learn from you 😄

    Reply
  • April 1, 2018 at 3:39 am
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    So if I were to consider an U processor for gaming, cooling solution is the most important factor. I just hope higher TDP chips arrive soon. I don't want to buy a 7700HQ atm and regret later for not waiting 😩

    Reply
  • April 1, 2018 at 5:05 am
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    Well I personally think that each core has it's own benfits in different scenarios. But like you said I am also interested in seeing 8550U in a thicker and better cooled laptop.

    Reply
  • April 1, 2018 at 6:11 am
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    Wow 6700 hq is still powerful

    Reply
  • April 1, 2018 at 6:14 am
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    I m happy with 6700ha with gtx 1070 instead if intel hd lol

    Reply
  • April 1, 2018 at 6:34 am
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    Nice vid jarrod !!!!

    Reply
  • April 1, 2018 at 10:50 am
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    My 4720hq is still holding on!

    Reply
  • April 1, 2018 at 11:13 pm
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    Any news on when you will be getting the msi ge63vr raider for comparison??

    Reply
  • April 21, 2018 at 4:00 am
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    Which one should i get, and why?opnions would be appreciated.
    i7-8850H with 1050
    i5-7300Hq with 1060 120hz
    i7-7700Hq with 1050ti

    Reply
  • May 15, 2018 at 8:19 am
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    Try undervolting please

    Reply
  • May 24, 2018 at 12:30 pm
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    Lenovo ideapad 700-15isk is good enough or Ideapad 520-15ikb better?

    Reply
  • June 2, 2018 at 10:44 am
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    i mean lenovo Y 700 is still better or not

    which will be better in same range legion Y 520 i5 VII Gen or lenovo Y 700

    Reply
  • June 29, 2018 at 4:07 pm
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    I have XTU profile to run the 8550U at 3.0ghz+ on a notebook….you can run at 3.8ghz if you replace the stock cooler with a water cooling block or a gpu cooler. if you are interested let me know if the comments.

    Reply
  • July 5, 2018 at 5:56 pm
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    Using both right now. Bought 6700hq year ago now got 8550U thinkpad with 2GB of RX 550 from workplace. Both are good in their own strengths. But I use 8550U more because I dont game much and it 8th gen provides good battery and performance for designers.

    Reply
  • July 17, 2018 at 1:58 pm
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    Why does everyone test this CPU with the DELL XPS Models? They're probably the only vendor that is powering this CPU at 25W. A major chunk of the laptops with 8550U run at 15W and the performance can be quite different!!

    Reply
  • August 6, 2018 at 10:04 pm
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    Guys which processor is better for gaming? i5 7300hq or i5 8250u or i7 6700hq?

    Reply
  • September 15, 2018 at 8:42 am
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    I bought a new laptop yesterday that has nvidia geforce graphics card with an Intel i7 8550U, It runs medium settings on fortnite, at around 50 fps, it runs smooth. its not really a thin laptop. it has better cooling than my old laptop.

    Reply
  • October 13, 2018 at 7:01 pm
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    U series are terrible when they hit their tdp and passive cooling. they throttle down to 1ghz and it is slow as p3 processor. doesn't matter how many cores they have.

    Reply
  • October 18, 2018 at 5:34 am
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    My 6700hq NEVER boosted beyond 3.3ghz, just bought a new laptop with 8850u, hopefully it can boost higher.

    Reply
  • May 15, 2019 at 1:48 pm
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    i still have my aero 14 with 6700hq. It is still quite thin compare to slim laptop that is out nowadays.
    But chassis.. sucks. btw it is still powerful enough to code

    Reply
  • July 18, 2019 at 10:21 am
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    With my i7 6700hq i get only 15w with some mods, which is quite nice.

    Reply

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