8550U vs 6700HQ – Laptop CPU Comparison and Benchmarks
. 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 weve only got the. U series and desktop processors and 6700HQ CPU is from the 6th generation known as Skylake.. First lets 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. Thats, 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 6700HQs 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 Im 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 Ive 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 2133MHz, while the 8550U laptop only has 8GB of LPDDR3 at 1866MHz. So a small amount of the performance difference may be due to this and is worth keeping in mind.. Overall, the laptops arent too different in terms of specs. We should still be able to compare the CPUs for the most part. In Adobe Premiere Ive 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 theres a fair difference between the two with the 6700HQ able to better handle sustained multicore speeds.. Next ive 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. Ive 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 Ive 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 doesnt go for that long and doesnt 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 Id 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 6700HQs 3.5GHz, and its 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 doesnt 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 6700HQs, all core 3.1GHz boost. As a lower power chip, its been placed into a small laptop here, so theres, 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 its 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 youre already running a laptop with a 6700HQ theres, 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 Id probably only consider the change if I wanted to swap to a ultrabook style system.. I havent tested the differences in battery performance or temperatures, as both laptops have different sized batteries and different cooling solutions. It wouldnt be a fair comparison. For the same reason I also havent 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 Intels 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. Id, be interested in seeing what the 8550U can do in a thicker laptop with better cooling, and I cant 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.