i7 8700kWHEA_UNCORRECTABLE_ERROR detected new cpu
i7 8700kWHEA_UNCORRECTABLE_ERROR detected new cpu
Wait a moment. If you purchased it a year ago and it was built about two years prior, then you should be able to connect *both* 4 pins together into the 8 pin slot as a combined 8 pin. The two 4 pins match exactly in design, just plug them together and push them in simultaneously. I’m certain this is the intended method. There isn’t a setup where a motherboard has two separate, split 4 pin connectors—except for models with an extra PCIE connector for additional video power across multiple slots. You’ll only find single 4 pin, single 8 pin, 8+4 pin, and 8+8 pin options. My Seasonic has two 8 pin connectors: one is a "fused" 8 pin (can’t be divided) and the other is a 4+4 pin that can be split. I’ve connected both to their respective 8 pin connectors (Z390 Aorus Master) fully. The low voltage reading you saw when only one 4 pin was in came from your CPU’s +12V measurement being unusually low. You likely needed to connect the entire 8 pin connector on these boards. A single 4 pin isn’t supported, probably because it’s not a standard setup for Z390. It might work for 4-core non-K processors, but it’s definitely not a recommended configuration. Your board probably had a safety measure to handle the lower voltage by itself (which isn’t typical for Z390), possibly because it’s trying to compensate for the single 4 pin alone. It seems your system was unstable—drawing excessively low voltage and the motherboard couldn’t manage the mismatched configuration (4 pin vs 4 pin in separate PSU groups). This could be why you crashed.
It seems the setup might have caused confusion, as the motherboard expected a different pin arrangement. The HWInfo64 data might not reflect the actual configuration, and using HWinfo64 is recommended for accurate monitoring.
I'll insert it properly and then. With my old i5 8600k, I also connected it incorrectly—using the wrong pinouts. One 4-pin in the single connector and one 4-pin in the 8-pin. It might have been enough to run without issues. I'll run hwinfo64 and update you.