You're correct -- the specs page of the new iMac Pro is intentionally vague, but they do confirm this much at least: https://www.apple.com/imac-pro/specs/ https

You're correct -- the specs page of the new iMac Pro is intentionally vague, but they do confirm this much at least: https://www.apple.com/imac-pro/specs/ https://www.apple.com/imac-pro/specs/ (The 64-variant will actually have 16GB HBM2, instead of 8, though.)