4k Video Editing Mac Specifications

Hi There, I am looking to purchase an iMac Pro for 4k Video Editing in Premiere Pro. I am reading conflicting advice online about whether more than 64GB of RAM is required and whether the Vega 64 will be adequate.

Will these Mac specs do the job?

• iMac Pro
• 3.2GHz 10-Core Intel Xeon W processor with Turbo Boost up to 4.2GHz
• 64GB of 2666MHz DDR4 ECC memory
• Radeon Pro Vega 64 with 16GB of HBM2 memory
• 2 TB SSD Storage (Plus external 16TB RAID Drive)  

Cheers,

Anna