RAM

Laptop RAM

DDR5 Laptop RAM

Get single stick with high capacity. No need to use dual channel like in DDR4.

Crucial

Prefer highest speed, 5600Mhz so that you get good resale value later. If your CPU/motherboard only supports lower speed like 4800Mhz the 5600Mhz RAM will run at a lower speed anyways. And since you have limited slots, prefer higher capacity RAM.

Crucial 8GB DDR5 → 5600Mhz | 4800Mhz

Crucial 16GB DDR5 → 5600Mhz | 4800Mhz

Crucial 32GB DDR5 → 5600Mhz | 4800Mhz

DDR4 Laptop RAM

Crucial

Rs. 2500 Crucial 16GB DDR4 3200Mhz → Amazon India: CT16G4SFRA32A

Rs. 1300 Crucial 8GB DDR4 3200Mhz → Amazon India: CT8G4SFRA32A  | Variant 2

G.SKILL

Only if you don't find the seller for Crucial from above.

Rs.2400 G.SKILL Ripjaws 16GB DDR4 3200Mhz → Amazon India: F4-3200C22S-16GRS

Rs.1100 G.SKILL Ripjaws 8GB DDR4 3200Mhz → Amazon India: F4-3200C22S-8GRS

Desktop RAM