I'm trying to compare the memory bus of my current 27" iMac i7 2017 with the M1 Max/Pros, but I'm sure I have the specs wrong because the figures are so extreme...
27" iMac 2017 256-bit bus speed = 400 MB/s = 0.4 GB/s
(https://www.bhphotovideo.com/c/product/1380904-REG/apple_z_8c11_bh_27_imac_pro_with.html)
M1 Pro 256-bit bus speed = 204 GB/s
M1 Max 512-bit bus speed = 408 GB/s
(https://www.anandtech.com/show/17024/apple-m1-max-performance-review)
So the M1 Max memory bus is more than 1000x faster than a standard iMac from 4 years ago? Is that correct??
I understand it's partly because of the bus width doubling, and also that M1s have unified RAM/VRAM, so in some ways I'm comparing apples and oranges. Am I confusing memory bus with another bus?
I wondered if someone could help me understand what I'm looking at and correct my maths...
For context: I'm a video editor so the latency and responsiveness of the UI and scrubbing long 4K timelines are tangibly bottlenecked by the bus speed of my iMac.
Thanks
27" iMac 2017 256-bit bus speed = 400 MB/s = 0.4 GB/s
(https://www.bhphotovideo.com/c/product/1380904-REG/apple_z_8c11_bh_27_imac_pro_with.html)
M1 Pro 256-bit bus speed = 204 GB/s
M1 Max 512-bit bus speed = 408 GB/s
(https://www.anandtech.com/show/17024/apple-m1-max-performance-review)
So the M1 Max memory bus is more than 1000x faster than a standard iMac from 4 years ago? Is that correct??
I understand it's partly because of the bus width doubling, and also that M1s have unified RAM/VRAM, so in some ways I'm comparing apples and oranges. Am I confusing memory bus with another bus?
I wondered if someone could help me understand what I'm looking at and correct my maths...
For context: I'm a video editor so the latency and responsiveness of the UI and scrubbing long 4K timelines are tangibly bottlenecked by the bus speed of my iMac.
Thanks