here are some suggestions for SSDs and RAMs with 16GB capacity and PC4 for a laptop and desktop:

SSDs

• M.2 NVMe: These SSDs are the fastest type of SSD available, and they offer the best performance for gaming and other demanding tasks. Some good M.2 NVMe SSDs for 16GB include:

  • Samsung 970 EVO Plus 
  • WD Black SN850 
  • Crucial P5 Plus 

• SATA: SATA SSDs are a bit slower than M.2 NVMe SSDs, but they are still much faster than traditional hard drives. Some good SATA SSDs for 16GB include:

  • Crucial MX500 
  • Samsung 870 QVO 
  • Western Digital Blue SN550 

RAM

• DDR4: DDR4 is the latest generation of RAM, and it offers the best performance for most computers. Some good DDR4 RAM kits for 16GB include:
  • Corsair Vengeance LPX 
  • G.Skill Ripjaws V 
  • Crucial Ballistix 

Here are some specific recommendations for a laptop and desktop:

Laptop

• SSD: Samsung 970 EVO Plus 16GB M.2 NVMe 
• RAM: Corsair Vengeance LPX 16GB (2x8GB) DDR4-3200 

Desktop

• SSD: WD Black SN850 16GB M.2 NVMe 
• RAM: G.Skill Ripjaws V 16GB (2x8GB) DDR4-3600  

These are just a few recommendations, and there are many other great SSDs and RAMs available. It is important to do your research and find the best option for your needs and budget.