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ram slots 1 and 2 unusable

ram slots 1 and 2 unusable
« on: December 28, 2016, 03:10:21 am »
My z170x Gaming 7 mobo won't work in dual channel mode. It gives error code 55. I turned off fast memory boot and was able to boot in slots 1 and 3 but it randomly locks up. Is it the ram or mobo?

This is the second one of these i've went threw! the last one wouldn't boot after setting XMP profile 1 setting in bios version F20. It bricked the board.

The memory is Corsair 8gb LPX vengeance. I checked for bent pins in the cpu socket there fine. Clear coms 3 times. Upped the voltage to the ram to 1.36. Updated bios to F8.What else can i try?

Thinking i'm going to need to RMA this board AGAIN which is getting really frustrating. I can't exchange it with newegg anymore the 30 day exchange period is over . Its gonna take for ever to get a replacement!

Hope someone can help!
« Last Edit: December 28, 2016, 03:54:47 am by bradp75 »

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Re: ram slots 1 and 2 unusable
« Reply #1 on: December 29, 2016, 04:20:05 pm »
Are you using memory above 2133Mhz?
Z390 AORUS PRO (F10) \850w, 9900K, 32GB GSkill TriZ RGB - 16-18-18-38, RTX 3080Ti FTW3 Ultra, 960 Pro_m.2, W11
Z370-HD3P (F5) \750w, 8350K, 8GB LPX 3200 - 16-18-18-38, GTX 970 FTW SC, Intel SSD, 2TB RAID1, W11
Z97X-UD5H \850w, 4790K, 32GB Vengeance, RTX 2080 FTW

Re: ram slots 1 and 2 unusable
« Reply #2 on: December 29, 2016, 07:51:13 pm »
The bios says its running at 2133 , Just load optimized defaults and ran like that.