Hey
So, good news - Corsair replaced the faulty kit with a new one. So-so news - It's the same type of kit, just a different memory version number.
The old kit was version 5.39 Hynix AFR (as per Thaiphoon Burner) or Hynix CJR (from online searches depends on which link I look at) and the new one is version 5.32 Hynix CFR or CJR (again this is from online, which shows conflicting ids depending on where I look).
Am trying to sell it to my local vendor at near market, because it is a sealed unused new kit. If that doesn't happen,
I will put it in my AMD Ryzen 1800X (current) build and try to OC it to 3200 MHz. Here's to hoping for a good result. Most importantly, at least Corsair didn't ditch me