Graphics Card's Bandwidth

[FCTPWS]

How Can i measure Video Card's Memory Bandwidth?
i mean the formula?
in my Experience..... if i have a Video card with 1800MHz Memory Clock & 128bit of Momory interface. i'll multiply 1800 with 128 and then divide with 8 to get Bandwith on MB/s or GB/s...
now my question is that means that has 128 connectins with memory controller? and its single connection clocked at 1800MHz? or am i completely wrong? looking for Good and clear answer....

 

[CountMike]

https://www.techpowerup.com/gpuz/ can tel you that about your card.
My R7 260 for instance:
Memory - 1500MHz
Bus width - 128 bit.
-----------------------------
Bandwidth - 96.0 GB/s

 

[CountMike]

https://www.techpowerup.com/gpuz/ can tel you that about your card.
My R7 260 for instance:
Memory - 1500MHz
Bus width - 128 bit.
-----------------------------
Bandwidth - 96.0 GB/s

 

[RobCrezz]

https://forums.geforce.com/default/topic/470368/geforce-basics/how-to-calculate-the-memory-bandwidth-of-a-graphics-card-/