Welcome to the Dell Community  @gunum 

Yes 1TB WDB SSD will work just fine.

32GB memory is max.

Dell Vostro 5471 Owners's Manual:

https://www.dell.com/support/manuals/us/en/04/vostro-14-5471-laptop/vostro_5471_om_pub/memory?guid=guid-715e6b06-60fd-4e44-9449-a241ab64a89f&lang=en-us

Dell Vostro 5471 compatible upgrades:

https://www.crucial.com/usa/en/compatible-upgrade-for/Dell/vostro-5471

Best regards,

U2

hi thanks for the link.

I confused, some said incompatible, others said compatible, for RAM issue.

however, is it better use 1 existing ram module, and another is new one?

will 32GB RAM bring significant better performance ? or just more bring heat rather than performance

@gunum 

16GB will show some performance increase.

Unless you are rendering video, using CAD/CAM or a heavy gamer 32GB will not be noticeable!!!

It is always best to use matching pairs of memory.

You would increase performance by taking advantage of "Dual Channel" with matching pairs of memory.

https://www.crucial.com/usa/en/what-is-dual-channel-memory

Regards,

U2

hello there,

sorry to raise up this post again.

hardly to seek crucial. already order in USA, but never came to me.

however, I plan to add single channel 8GB Team Elite SODIMM DDR4 2400mhz PC19200 (link).

will it be ok?

anyone help and advice would be very appreciate. thanks.

Could you please private message the service tag, let me check. ^VA

hi, noted. sent private chat to you.thanks

Thanks, received the service tag, I will check and private message you the details, give me some time. ^VA

Where did you get the RAM?

hello,

I just bought from local store. thanks

Thanks