Vega 56 models size

[Guest Jedispirits]

First of all excuse me if there is a topic about this same question, but I was not able to find it

 

I'm thinking about buying a Radeon Vega 56 for my Mac Pro 4.1 -> 5.1, but it seems that not all models have the same size. I need all 4 PCI slots so I need to find a model which let me use all 3 rest slots.

 

Could you help me with this? Which models are the best?

 

Thanks in advance

 

Source: MacRumors