No image and no mobo feedback (X99 Extreme4)

For starters I'd suggest laying your hands on a PC Speaker/Buzzer.

The MB itself doesn't have an in-built one but instead has a 4-pin header with which to connect one.


Rock and a hard place, yet w/o the Dr.Debug LEDs, you now NEED a speaker/buzzer to hear the beeps to diagnose.

Hi wardog and parsec,

thanks for your answers.

Rock and a hard place, yet w/o the Dr.Debug LEDs, you now NEED a speaker/buzzer to hear the beeps to diagnose.

You're right, probably the mobo is telling something I can't hear because it does not have an integrated beeper.
I've ordered a kit with a beeper hoping to hear something.

Is the mother board even screwed down onto the standoffs in your case? Hope there are standoffs in the case, otherwise the board is shorting itself to the PC case. Scary stuff!!

Yes the mobo is screwed on standoffs. :)

The full model number of the memory will allow checking compatibility.

Corsair CMK16GX4M4B3000C15 Vengeance LPX 16GB (4x4GB) DDR4 3000Mhz CL15

I imagine you removed the CPU cooler for the picture.

The cooler is not on the photo because it hides the other components (this is a huge Dark Pro 3 :-))
Moreover during my tests I've not felt any heat coming from the CPU so either the mobo is not using it, either it uses it too little to make it heat up.

You must supply the POST beep speaker, the board has a header for it, but no built in speaker. Normally, the POST beep option is set to Disabled by default in the UEFI/BIOS.

But if disabled by default you mean I might not be able to hear beeps even with an external speaker?

What PSU are you using?

A Be Quiet Straight Power 10 400W

The video card does not seem to fill the entire PCIe x16 slot. Is that normal for that card? I guess it is.

This is a small GPU but I've tried with my old one which fills all the slot without any change.

I've done more tests :
- switch GPUs between my old computer and this build: new GPU is OK on the old one and the old GPU does not change anything to the new build => not an obvious GPU issue
- clear the BIOS with the jumper method, then with a raw CMOS reset, nothing changes => not an obvious BIOS version issue
- use the backup BIOS: same issue => same conclusion
- mount outside the case: same issue => not an obvious short

I'll keep you inform if I manage to get more information with mobo beeps...

Thanks again for your help.

You will not be able to get any beeps from a connected POST beep speaker until you are able to get into the UEFI and enable that option, sorry to say. I am sure of that.

This is your memory, correct: http://www.corsair.com/en-us/vengeance-lpx-16gb-4x4gb-ddr4-dram-3000mhz-c15-memory-kit-black-cmk16gx4m4b3000c15

Your memory model number is only one letter different than other Corsair models in your board's Memory Support list. For example, there is the CMK16GX4M4A2800C16 model, a Vengeance LPX model, of slightly different speed and latency. I wonder if that letter is a color code? Your memory seems as if it should be OK.

The PSU is a bit on the low power side for an X99 platform, but if you don't OC the CPU, and don't have a lot of other hardware, it may be usable. Is this the PSU model:

http://www.bequiet.com/en/powersupply/518

If that is the PSU you have, I'm concerned about an aspect of its design.

This PSU multiple rail design, with three 12V rails, rated at a maximum of 18A each.

The DC wattage of 18A at 12V is, 18A x 12V = 216W.

The maximum combined 12V power in Watts is 384W. Note that this does not include the power draw from the 5V and 3.3V rails.

Three 12V rails at 18A each would be 216W x 3 = 648W. Obviously beyond the 400W continuous and 450W peak power ratings. Again, this calculation ignores the power usage of the 5V and 3.3V rails.

Using the maximum combined 12V power of 384W, that would be 128W for each 12V rail, ignoring the 3.3V and 5V rails.

I cannot see the three 12V rails power distribution for all the cables, usually given on the label on the PSU. My point is multi-rail PSUs need to have their power draw balanced to prevent overload on each rail. Your usage of the PSU is not complicated, and given your hardware, it looks like you'll be Ok.

Try using one DIMM only in the A1 slot. Try another PCIe slot for the video card. The connection to the video card makes no difference, just be sure your monitor will either auto select that input, or switch manually to HDMI, D-Sub, or whatever is in use.

I assume you have a mouse and keyboard connected to the board?