AM3 socket I'm trying to add a H100i to, none of the AM/AM4 brackets fit it right, the small half of the TR4 fits the top but two of those don't reach.
Hardware by design: Intel heatsink mounting brackets on my AM4!
AMD AM3/AM4 CPU Cooler Fan Heatsink Buckle Base Mount for Intel 115X 1200 1366 D | eBay