Well it turns out in my haste putting everything together in my new case I mistakenly crossed my reservoir outlet and radiator inlet lines on the pump inlet and outlet respectively. My loop was going radiator-pump-reservoir-cpu instead of reservoir-pump-radiator-cpu as it should. Whoops. I didn't notice until I went to switch my zip ties for some hose clamps I got and said WTF? I guess pumping into the reservoir would explain things. I'm still going to make a reservoir for my pump inlet to attach to, but at least now I've got this taken care of. There's still a tiny bit of cavitation going on that I can barely hear (probably due to the 3/8" ID inlet tubing) but the reservoir is coming so I don't have to worry about it so much now.
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