Effective clock speed? Something seems off

[sergnio]

Hi all,

 

Just shopping for some GPUs here, trying to get the most bang for my buck!

 

I noticed this though.

 

GPU 1: $620

Chipset

GeForce RTX 2080

Memory

8 GB

Memory Type

GDDR6

Core Clock

1515 MHz

Boost Clock

1860 MHz

Effective Memory Clock

7000 MHz

 

GPU 2: $800

Chipset

GeForce RTX 2080

Memory

8 GB

Memory Type

GDDR6

Core Clock

1515 MHz

Boost Clock

1815 MHz

Effective Memory Clock

14000 MHz

 

 

They both have GDDR6, so I thought you multiply the boost clock speed by however many "pumps" the memory can provide, which is 4 in this case.
So it seems like the clock speeds should be identical, but one of them is double over the other (1815 * 4 = 7,260) & (1860 * 4 = 7,440) 

Any logical reason why this is the case? 

Am I missing something very important?