Z97MX-Gaming 5 Reboot on AIDA64 Extreme CPU Stress Test

[CTBlankenship]

Every time I try to start a stress test for this board (i7-4790K stock settings ... no O/C) the PC reboots.

Same problem with Prime95.

I am an experienced O/C'r with ASUS ROG boards but I ran into too many problems with the HERO and simply would not risk using them with a client machine.  So, I came back to my tried and true MoBo mfgr. 

All of the settings are stock except for the XMP 2400 (G.Skill TridentX F3-2400C10D-8GTX DDR3-2400 memory sticks - 2 x 4GB).

CPU-Z puts Core Voltage @ 0.914V
CPUID HWMonitor Core Voltage @ 1.04V

The power supply is a Seasonic SSR-550RM 550W RT ... so I'm pretty sure the 12V rail voltage is stable.

Also, I want to keep this CPU running at 4.0GHz all of the time ...

Core Temp 0.99.8 Frequency: 3850.17MHz (100 x 38.5)
CPU-Z Core Speed: 800 MHz ; Multiplier: 8.0 ; Bus Speed 100.00 MHz

The BIOS looks like it is setup for this but I don't know which utility to trust since my two favorites do not agree on anything.

Thanks,

C. T.

[CTBlankenship]

Hey ... just a follow up to the question ... solved it.

The Rev. 1 motherboard ships with BIOS F2 ... Intel Core i7-4790K is only supported by the F4 BIOS Verson.

Updating the BIOS in this situation is not an option ... since the first step of a system build should be upgrading to the new BIOS this "no duh" is on me.

Just thought I'd let some other unsuspecting souls know about the possible issue.

Also, in another post I complained that the temperature in the BIOS did not match the temperature reported by CoreTemp ... as you might expect, that problem went away with the BIOS upgrade as well. 

See that other post (http://forum.giga-byte.co.uk/index.php/topic,14808.0.html) ... autotech nailed it when he asked the question "Do you have the newest BIOS?".  Thanks autotech.