Type of DDR and their common sizes.
Below are list of ram,their types and sizes.
Before I proceed to list them, let me, first of all, make you understand the works of ram in a computer.
The major work of ram in a computer is for display and also for speed. without ram computer cannot display.
So for a computer to display, there must be a very good working ram in it, and sometimes when you insert lower ram in a higher computer, it may also not display.
Note; the types of ram that am about to list here are for laptop not for desktop,
I hope you all know that desktop and laptop are not using the same ram? the ram for desktop
1.DDR1[R1]: This type of ram Have long vertical
and horizontal I.C [integreted circuit] attach to it on the surface with one opening[one channel] almost at its edge, just like in the photo below.
Sizes: 1GB, 2GB, 4GB, 512MB, ETC
2. DDR2[R2]: This type
Sizes: 1GB, 2GB, 4GB, 512MB, ETC.
3.DDR3[R3]; this type of DDR is different from the other two mentioned above. it has it own one opening [One channel] almost at the middle and a shorter IC like that of DDR2, see photos below.
Sizes: 1GB, 2GB, 4GB, , ETC
4. DDR4[R4]; this type of Ram are similar to that of R3, it also has shorter IC with one opening[one channel], you can find this type in some of this modern pc, not yet that popular in the market.
on this one you can find single 8GB
5. SDRAM[SD], this type of Ram is totally different from that of R1, R2, R3, and R4. SDRAM has two opening[double Channel], but possess the same IC as that of R2 and R3, see the photo below.
Sizes: it has only 512mb, or below’