For anyone curious here is both variants of PS2 backwards compatible motherboards. Top is full BC, bottom is hybrid BC : r/PS3
Digital Foundry on Twitter: "It's been a while since I posted one of these - but this one's a beauty. The original, full back-compat PlayStation 3 CECHA0 motherboard. Never released in the
Sony Playstation 3 Slim Motherboard
Original CECH-25xxA/B JTP-001 Motherboard for PS3 Slim Main Board FW 3.55 With Bluray Board
Sony Playstation 3 PS3 Motherboard SEM-001 with BMD-001/002 Logic Board CECHG01 | eBay
Motherboard/ Mainboard for Fat Playstation 3 PS3 20g/40g/60g/80g (Pulled) (WRP3053) - China for Ps3 Mother Board and for Ps3 Main Board price | Made-in-China.com
Playstation 3 Motherboards | Wireless Motherboard Parts | Ps3 4000 Motherboard - Ps3 - Aliexpress
GOWE bga rework station for ps3 motherboard ELSTEIN Heating Plate And German Glass - Amazon.com
PlayStation 3 Slim Motherboard Replacement - iFixit Repair Guide