RAM

Question 1

DDR

Answer 1

184-Pin w/ 1 notch

DDR speed rating is 2x the clock speed

Question 2

DDR2

Answer 2

240-Pin w/ 1 notch

DDR2 Speed Rating is 4x the Clock Speed

Question 3

DDR3

Answer 3

240-Pin w/ 1 notch (not the same position as DDR3)

DDR3 Speed Rating is 8x the core Clock Speed

Question 4

DDR4

Answer 4

288-Pin w/ 1 notch (different spot as DDR3)

Uses the term Bandwidth when talking about DDR4

DDR4 Speed Rating is 8x the Clock Speed

Question 5

PC Speed Rating

Answer 5

always 8 times the DDRX speed rating

Question 6

SO-DIMM

Answer 6

Smaller sized Ram sticks for when space is restricted. Laptops usually

Same rules/sizes etc apply to these sticks of RAM

Question 7

Parity and ECC (Error correction code) RAM

Answer 7

Contain extra chips to check for RAM errors

ECC is only for motherboards that support it.
Very rare and usually only seen on servers

Question 8

SPD(Serial Presence Detect) Chip

Answer 8

A small chip on a RAM Stick that allows the system to query information like:
Manufacturer, model, speed, capacity, what technology you are