Shacruel

Thank you for confirming NVME support by the 2nd m.2 slot. I also eventually switched to mismatched RAM but in 16+4 configuration and I also observe no issues or performance degradation in games and other software

I have an update. I got my hands on a 16 Gb RAM stick. Installed it in my laptop, so I got 4+16 configuration. Everything works fine. No drops in performance can be observed in daily usage. I was mostly concerned about gaming performance but fps remained the same. I have played Overwatch to test gaming. So it is a solution for this line of laptops. Not ideal but still good.

https://www.notebookcheck.net/Lenovo-V155-Review-Budget-laptop-turns-out-as-a-storage-giant.435036.0.html This is a benchmark for 3500u laptop with 8+4 config. It scores the same in benchmarks as an average 3500u laptop. So it looks like not matched RAM config is not an issue.

Sorry for resurrecting this old thread. So their inclusion of second RAM controller does allow to add more than 4GB of RAM to the second (the only SODIMM) slot without performance drop, right? Sorry, I do not know much about CPU architecture. From what I managed to find online it looks like original desktop Zen processors have only one memory controller. Curious that mobile ones have two.

Yeah, you told that in s540 discussion. With all due respect, I wanted to hear other opinions. For example in one of the YouTube videos for s340 model, people discuss adding up to 16 gigs without noticeable penalty

Hi. I recently bought Ryzen 3500U based laptop with 8GB of DRR4 RAM (4 soldered + 4 in the only SODIMM slot). I am leaving soon to study abroad and this laptop will be my only PC for 1 year at least. I am considering swapping 4 GB stick to 8 or 16. Does Flex mode work well with mobile Ryzen? I've been told there will be performance issues but I am not so sure (vendor produces modification of this laptop with 4+8 configuration) Advice would be helpful. Thanks!

Are they really worth it? According to Gamers Nexus, m.2 drives live longer if they actually heat up during writes. Source: 6:15

AFAIK It's possible to do partial dual channel. In case of our notebook first 8 GB will run in dual channel, rest in single. Intel calls it Flex mode, amd also supports it.

I think that m.2 I mentioned is actually SATA6 they used on this model. https://psref.lenovo.com/Detail/Lenovo Laptops/ideapad_S54014API?M=81NH005TRK

Looks like there is always 4Gb soldered + whatever Lenovo puts in the only sodimm. 0, 4 or 8 Gb of additional memory

I have found this image of the s540 board on the Internet. It looks like there is empty m.2 socket on the right. Was anyone able to use it?

After I got home and connected to 5Ghz wifi instead of phone hotspot BT stuttering issues dissapeared. BT range however is acceptable but still lower than my phone's. It's really not a big deal for a notebook

Did anyone encounter BT issues? Sound in my wireless headphones is choppy while watching 1080p YouTube. I suspect Realtek wireless card. I've heard many laptop users replace them in favor of Intel ones.

https://psref.lenovo.com/ This site actually has a lot more information about specs of their products than their regular consumer site.

Thank you very much for the review. I have ordered copper colored R5 3500U unit today.