Hi. I have updated my Asus Z170i Pro Gaming to the latest BIOS and inserted a I7 7700K. When I try to Boot with RAM in slot DIMM_B1 it get stuck shifting between DRAM LED and CPU LED. With RAM only in DIMM_A1 it boots normally.

[AMehr7]

With my I5 6600K it boots fine with RAM in both Slots. No bent pins.

Any idea whats wrong?

[AlHill]

Try different memory.

Try updating your bios.

Doc

[AMehr7]

Already tried that.

[n_scott_pearson]

You installed the BIOS with this i5 installed, right? It should not be the i7.

[AMehr7]

Yes. Did the update with the I5 6600k prosessor and flashed the bios two times like Asus ​describes.

[n_scott_pearson]

Specifically, what memory do you have installed? Provide part numbers please, not description!!

[AMehr7]

Sure, using my I5 6600K for the moment.

DIMM_A1: KHX2666C15D4/8G

DIMM_A2: KHX2666C15D4/8G

[n_scott_pearson]

Not seeing anything out of the ordinary regarding this memory. I wonder if this processor you have has a bad memory controller. Was it new?

...S