I'm not buying a Ryzen yet, that's out of my budget and as I said I want to see what Ryzen generation v1.5 ends up being. (You know, how CPUs have later, faster releases after the first models of the generation hits.)
It's more of "I always wanted to try this" then a serious practical need. However, when I do upgrade to a Ryzen, all I'll have to do is buy the appropriate CPU block adapter.
It's going on my current AMD-FX 8370 which had a TDP of 150 watts. I've also got a GTX 1060 but it's pretty damn cool 99.9% of the time (even running 0 RPM often).
Flaw in your plan is the amount of electricity you will bee to run a pump big enough to move water through that this.
Only depends on the restriction's head loss and desired flow rate. One thing people often forget is that any wattage the pump takes will be added into the fluid medium and increase the required radiator size.
Sadly, the biggest "issue" is that I couldn't find a cheap CPU block with a hose size inner diameter above 3/8". I was hoping for at least 1/2". I may CNC a custom heat block in the future for the Ryzen setup since the radiator has whopping 1-1/4" hoses.
 Also, annoyingly, I had to pay out for adapters to get down to 3/8". I found "cheap" ones for $20 for two, but it's still kind of crazy to think I paid 20 for adapters and... 35... for the whole damn radiator.
Hmm, those adapters weren't quite the 3/8" they said they were...
I imagine I can braze a 3/8 NPT fitting in there. But I wonder if there's a re-usable solution that will allow me to go up in hose size later without replacing those same adapters. Either yet another size adapter, or some sort of threaded setup.
DOH, I was up too late when I ordered them. They go to 3/4, not 3/8. Damn you useless Imperial measurement system.