The Truth About Ryzen Laptops By Hot News

Hey friends, today's video is actually about something that started when I just picked up a few of the new dozen 4000 u-series laptops that have been coming out, and I noticed that there were some performance discrepancies that I couldn't account for like this zen book 14, which has a dozen 5 4500u with a mx350. But it performed worse than this dozen 5 4500u laptop with no dedicated graphics card in certain scenarios, and I didn't quite understand why, especially considering the fact that this was 4, 266 megahertz ram and this one was 3 200. So I did some investigating and I finally figured out, at least from my preliminary analysis, something that's very important to the current generation of laptop purchasing that maybe hasn't been so important before that you're absolutely going to want to pay attention to when you're. Looking for your next laptop, because the key difference between the zen book 14 and this Lenovo flex 5 is that even though they have the same exact processor, they actually have different types of ram. The zen book 14 is on LP ddr4, which stands for low power and then the flex 5 is actually on full ddr4 3200 they're, both dual channel ram- and this was actually exacerbated by the fact that I saw on this Acer, swift 3, which has a dozen 7 4700u. It's eight cores versus the 4500 u6 cores that it actually was barely beating the 4500.

U on my flex, 5, even though it had LP ddr4, 3200 megahertz, and so after doing some testing. I actually found out that there is a key thing that hasn't likely been important on intel CPUs. That now is important on AMD CPUs, and that is the latency of the ram. And what I found is that the bandwidth, the total bandwidth of the ram, is actually faster on these two laptops versus the flex 5. But the latency of the ram is actually faster on the full ddr4, which accounted for some performance increases that we saw on the flex 5.

So, through all of my testing, the ram latency on this flex, 5 with the 4500u ddr4 3200, was 98.9 nanoseconds on the zen book 14. It was 113.77 nanoseconds or 15 slower, the dozen 7 4700u, with LP ddr4 3200, not 4266, actually had the worst latency of the bunch at 121.4 no seconds or 22 worse than the flex 5. , and this accounted in actual worse CPU performance and to some extent, in gaming and gaming scenarios. This is made up for by the fact that the 4800u has a better graphics card. The zen book 14 also has a mx350, therefore performed better in some games, but in CPU bound scenarios.

It performed worse. So just taking a quick look at cine bench scores, the flex 5 had a great cine bench score of a multi-core score of 900 936 with a single core score of 175. The swift 3 had a single core score of 169 or 3 percent: worse and a multi-core score of 971, which is only three percent better. Despite having 33 percent more cores, it has eight cores versus the six cores, but could only outperform the six cores by three percent due to that ram. Latency, the? U on the zen book 14, had a worse single core score with 161 and a worse multi-core score at 791, eight percent.

Worse on single core 15, worse on multi-core, once you start transiting the cores, the latency starts to add up and the performance becomes worse. I saw this repeated in a few other scenarios in games like Valerie. It actually mattered quite a lot where CPU performance actually mattered more than the GPU performance, because Valorant runs on a freaking potato. So on the flex 5, we actually saw the highest fps average because of the ram latency in its better CPU performance. Despite having less cores than the 4700u, and despite the zen buck 14 having a mx350, it has a dedicated graphics card, and it performed worse.

Coming in the flex 5 at 135 fps, the swift 3 had 130 and the zen book 14 had 133, so the swift 3 was 4 slower. The zen book 14 was 1.1 slower, despite having a dedicated graphics card. This didn't hold up in other games such as Fortnite, where it's more GPU dependent the mx350 actually performing the best coming in at 87 fps, but when it was just integrated graphics between the swift 3 and the flex 5, the flex 5 beat the swift 3 by 10, despite it having a better GPU. Pub g is the only example that of the things that I tested, where the flex 5 actually lost out, where it got 38 fps average the swift 3 was 42 and then the zen book 14, with its dedicated GPU, was 55. So in certain scenarios this ram latency issue doesn't seem to matter, but in more CPU bound scenarios.

This bottleneck is popping up and the reason I think this matters but hasn't really been discussed at this point, is because intel wasn't latency sensitive, but these new zen2 dozen 4000u CPUs, we know, are very sensitive to memory and that is showing up in benchmarks or at least in the benchmarks that I've been seeing. Comparing a dozen 5, 4500u laptop to another dozen 5, 4500u laptop and just looking at the CPU specs is not good enough to understand the performance difference. There is up to a 15 gap in these two laptops because of the ram the zen book 14 technically has faster rammed. It's 4260, the low powered ram is causing higher latency and therefore worse, CPU performance when you're using all the cores, the 4700u with 3200 megahertz lpddr4, while slightly better than the zen book 14, still is nearly neck and neck with a dozen 5 4500u, which has full ddr4 ram, and so I think this video is just to say make sure you check when you're buying a dozen, 4000 u-series laptop, find out. Does it have LP, ddr4 or regular ddr4, because that will actually have an impact on the performance and might not be something that the laptop manufacturers are going to fully express to you, and therefore I just wanted to make this video kind of as a PSA.

It's not that LP ddr4 is bad. The swift 3 was only slightly more expensive than the flex 5 and in certain scenarios it performs better. The zen book 14 was less than my flex 5 dollars less, even though it has a MX 350. I got it on a good sale, so I'm willing to spend fifty dollars less and get about five to ten percent less performance in certain games, because it was ten percent less price just because a dozen 4000, u laptop, has lpddr4 ram, doesn't mean that you have to throw it out. You need to consider the price implications in regard to something that might have fully fledged ddr4, like my flex 5.

So that's it. That's the video make sure you understand the difference up to 15 loss in multi-core scenarios, sometimes depending on between LP ddr4 and regular ddr4. Let me know if you've heard anything about this, because I couldn't find any pre-existing videos or articles talking about this for that matter, and the last thing I could find was that it didn't matter between LP, DDR and regular DDR, because it's just a bandwidth issue and was the last time you were bandwidth, starved on a laptop well now's the time zen 2 dozen architecture is actually making, so it matters now. That's at least how I found it. Let me know if you have different explanations down below in the comments I heard that it could be infinity fabric.

I checked it's not that, especially considering that the lpddr4 3200 is running at the same if speed as the regular ddr4 3200, and it still performed worse. So that's the explanation. I have keen to hear from you down below make sure you check LP versus regular goodbye. You.

Source : Hot News