Though the HX426C15FBK2/16 kit is qualified by Kingston for use with the ASUS/ASmobile Z170-K…
HX426C15FBK2/16
HX426C15FBK2/16
HX426C15FBK2/16
FURY Memory Black - 16GB Kit* (2x8GB) - DDR4 2666MHz CL15 DIMM
Part Number: HX426C15FBK2/16
Specs: DDR4 , 2666MHz , CL15 , 1.2V , Unbuffered , http://www.kingston.com/dataSheets/HX426C15FBK2_16.pdf
Timings: 2666MHz, 15-17-17, 1.2V
ValueRAM for ASUS/ASmobile Z170-K Motherboard
http://www.kingston.com/us/memory/search?DeviceType=2&Mfr=ASU&Line=Z170-K&Model=93074
…there are QC complaints:
HyperX Fury 16GB (2 x 8GB) DDR4 2666 RAM (Desktop Memory) CL15 XMP Black DIMM (288-Pin) HX426C15FBK2/16-Newegg.com
https://www.newegg.com/Product/Product.aspx?Item=N82E16820104573
As well the HyperX Fury’s heat spreader obscures the identity of the DIMM’s constituent chips:
A correlation between RAM and GPU problems on DDR4 Intel systems? - NVIDIA Developer Forums
https://devtalk.nvidia.com/default/topic/996607/linux/a-correlation-between-ram-and-gpu-problems-on-ddr4-intel-systems-/
I don’t yet know enough about the interrelationship between DDR4 RAM and graphics cards on Intel systems per se but IME if the RAM is flaky (for whatever reason) then nothing else is going to work right.
Have you tested those HX426C15FBK2/16s?
Memtest86+ - Advanced Memory Diagnostic Tool
http://www.memtest.org/
What’s more as RAM operating voltages continue to decline with each successive generation of memory technology (while RAM totals often escalate) the likelihood of bit-flips (which can cause random software errors, silent file corruption and security issues) in non-ECC RAM increases:
The following lecture is by Artem Dinaburg, who works for Raytheon Company, a major U.S. defense contractor:
"It turns out that non-ECC RAM is actually a security risk, as bit flips can be exploited. “Bit-squatting” from Black Hat 2011:
Mar 15, 2013
Blackhat 2011 - Bit-squatting: DNS Hijacking without exploitation - YouTube
Bitsquatting: DNS Hijacking without exploitation
http://dinaburg.org/bitsquatting.html
“…As the graph above shows, ECC RAM has a much lower failure rate than non-ECC RAM. The ~1% failure rate of the Kingston non-ECC RAM is still very, very good (which is why we primarily use Kingston), but the ECC RAM is even better at an average .24% failure rate…”
November 5, 2013
Advantages of ECC Memory - Puget Custom Computers
http://www.pugetsystems.com/labs/articles/Advantages-of-ECC-Memory-520/
Related:
May 13, 2014
ECC and REG ECC Memory Performance - Puget Custom Computers
https://www.pugetsystems.com/labs/articles/ECC-and-REG-ECC-Memory-Performance-560/
IMO anyone who is planning a new build would do well to invest in ECC RAM-supporting hardware.