No, I get it just fine. You, on the other hand don't. Any x99 board can handle 128Gb of ram, it's what it's designed for. The cpu has no issues at all. Neither does the cooler. In over 30 years of being around the guts of pc's, I've yet to ever see ram either causing mobo failure due to excessive heat or mobo failure due to reported temps of 45°C. IF there was a separate issue you hadn't yet identified before board failure, that won't be due to running all the slots at full capacity. You are saying you need a better cooler simply because you can't use the Dominator ram fans, and lack of using those fans caused board failure. That's bs. The mobo temp of 45°C is in no way related to the ram or lack of fans. The fans are usually a gimmick. Totally unnecessary except in 1 instance, extreme OC of the ram. For the most part, ram doesn't even require any sort of heatsinking, especially at stock settings. It's all a sales gimmick for higher end ram, all about the looks with very little to no real functionality. Most ppl with high end pc's with windows in cases and high visibility guts don't want to see the IC chips on expensive ram, therefore it's covered up in a fancy heatsink.
If you truly insist that it's an absolute necessity for you to use the Dominator fans, the best solution would be an AIO. Guaranteed 0 ram interference or any of its included airspace.
Your prior problem was a faulty board, not anything to do with any additional hardware, or lack thereof, since anything you added to the mobo was well within design specs.