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Z97X SOC Rev 1 (not force) cold boot issues


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Z97X SOC Rev 1 (not force) cold boot issues
« on: February 16, 2015, 08:10:30 am »
<note this is also posted on tweaktown forums>
I've recently built a system with a Z97X SOC board running bios F6.

I'm having issues with cold boots - using bios optimized defaults.  If I press the OC ignition button, then press power so the fans come on, wait 20 seconds or so and then press the power button again, the system will boot into windows fine.  Once booted, the system is stable and runs perfectly.  I've tried stripping it down to just the CPU/motherboard/ram and onboard graphics, but it behaves the same way.

Without the OC ignition button, the power will just cycle without the board posting.  This is annoying as I have to open up the case each time to reach the oc ignition button to get it to boot.

8gb corsair platinum 1600mhz
500gb Samsung 850 EVO
Nepton 280L, pump to a 3 pin header, fans to CPU_Fan.
2tb Seagate Sata
Radeon 290 tri-x
Essence STX
Corsair HX1000 PSU

I originally thought the bios was the issue (came with F3 or F4, can't recall), but I'm on F6 now and still having the issue.

What can I do to resolve?

Thanks in advance,