- Jul 31, 2012
- HD4600 / RX 570
- Mobile Phone
This is my theory as to why the Yeston RX550 4GB works for some people in their hackintosh.I guess i can give it a try, any one one to pitch in?
From a specs analysis and comparison with the mobile GPU called the RX 550X it looks to be a slightly modified version of that chip placed into a low profile enclosure. That's why the power draw is so low and the cooling fan is only the size of one you'd find in a laptop like the Macbook Pro. Yeston has simply dropped the X and is calling it Polaris 11 instead of Polaris 12.
Apple put the Radeon RX 555X into the 2018 MBP. They call it Polaris 21
The AMD Radeon Pro 555X is a mobile graphics card based on the small Polaris 21 chip from AMD. It is available in the 15-inch Apple MacBook Pro (Mid 2018 model with Coffee Lake) and is the performance is similar to the old Radeon Pro 455 / 555. The difference is the slightly higher clock rate of 907 MHz versus 855 MHz (+6%) and the bigger graphics memory (4 GB versus 2 GB GDDR5). The Polaris 21 chip is produced in a 14nm FinFET process and is the smaller Polaris chip. (from notebookcheck.net)