Question Underclocking memory stability

[sharijus]

Hello,
MB: Asus Z170M-Plus
Processor: i5-6600K
RAM: Kingston HyperX FURY 2x4GB 2133MHz DDR4 CL14 (old ones)
Decided to upgrade RAM and bought Kingston HyperX FURY 2x8GB 3000MHz DDR4 CL15.
As I replaced them I couldn't boot the system at all, so i put the old one's back and set RAM speed manually to 2133 MHz and put in the new one. Now the system runs fine @ 15-15-15-35 timings. Soo is it fine runing at these clock speeds or should I change smth or maybe even return RAM ?

FACTORY TIMING PARAMETERS
JEDEC: DDR4-2400 CL17-17-17 @1.2V
XMP Profile #1: DDR4-3000 CL15-17-17 @1.35V
XMP Profile #2: DDR4-2666 CL15-17-17 @1.35V

Thx in advance

 

[rgd1101]

go to bios and use #1, or #2 profile?

 

[sharijus]

Tried to use #2 profile seems to boot fine. Don't understand why i couldn't Boot pc when i replaced them. as boot i mean it was beeping

 

[Tenshimaxx]

I'm having the same issues.

If you want to use the new ram you have to fiddle with the timings and frequency until it's stable. Just keep your old ram so that you can boot and reset the timings if needed, or return those rams and keep getting the ram lottery until it boots on it's own