Newbuild won't post. Memory bad? MB?

[psyche]

New Build: all new parts

Antec GX500 case
ASRock Z170A-X1/3.1 MB
i5 6500K 3.20 GHz, using Intel fan
16GB (8X2) GSkill DDR4 3000 memory modules
Corsair CX600M full module PS
no video card, using intergrated video
no other expansion cards

As yet no HDD or SDD or ODD hooked up.

When power is turned on the Power LED on front of case lights, cpu fan spins PS fan spins. No case fan spins (see below). No post sounds (see below). No video.

the 2 PS connectors to MB are firmly connected.
Have reset memory modules a couple of times and reduced to only one memory module.
Have removed and reinstalled cpu and fan. (BTW, am using Arctic Silver)
Cleared CMOS
Removed battery to clear Bios

Re case fans (1 rear, 2 top) the wiring is preinstalled on this case. I cannot find any connector to attach to motherboard. For the 2 top fans the wires get routed to top of case, I believe to fan speed control switches. For the rear fan the wire also disappears into top of case.

Removed MB from case. Bread boarded. With no memory installed and everything disconnected except the 2 main MB power plus I get 3 beeps. Yay, progress!
Installed memory and back to no beeps regardless of whether 1 (tried both, in all 4 slots) or 2 memory modules used A1/B1, A2/B2 slots.

Should i presume that means bad memory or bad MB??? Is there anything I can do to narrow down choices? I do not have any other DDR4 modules to test with. BTW, used both DDR4's in single module install with same result (no beeps) so am tending to conclude the MB is bad as it doesn't seem likely that both modules are bad.
Is there any chance using the 3000 speed modules is a problem even though the MB is rated for well above that? If I RMA them should I opt for the more basic 2400 (given my set up would I really notice any difference - I don't play games?)

I appreciate any and all thoughts or help, thanks

Denis

 

[MongGrel]

My first thought personally is there is someone using a CX PSU again.

 

[UsandThem]

What is the model number of the ram? Maybe it's not compatible with your board (unlikely, but has happened).

Outside of that, I would order a 4 GB stick of ram that has been tested to work with your motherboard (use the ram manufacturer memory finder tool on their website).

That way you would know if it's the motherboard or memory.

Also, you are using both the 24-pin and your 8-pin (2 × 4-pin) CPU connectors, right? There was a guy a few weeks back on here who was, for some reason, only using one of his 4-pin CPU connectors on his Asrock and it wouldn't work.

 

[psyche]

Thanks guys.
What's with the CX psu comment?

Ended up RMA'ing both MB and memory. Per Asrock and GSkill techs that memory should have worked. Will know in 3 days when new MB and memory are here.

 

[Ketchup]

It does sound like a memory problem, as you get the expected response when the memory is out, and the lack of error codes when the memory is in. Let us know how the replacements work out.