Hi, I just built a new pc but on boot I'm getting error code 79 on the mobo and no display to my monitor.

I have:
2×8GB DDR4 RAM
Intel i7 8700k
And
1080 ti

Please help! Thanks

On what Motherboard?
CSM initialization Error 79 means that some component you have connected to your PC is not supported by your UEFI BIOS in most cases.

List your hardware by Make and Model
 
Also use the DP Port on the I/O Panel on the back of your Motherboard.
 
Your 1080 ti you have may not like your DP Cable.
 
Information about your Computer will allow members to help you.
This info will really help other Forum Members to help you.
 
Computer Case:
Make:
Model:
 
Motherboard:
Make:
Model:
Bios Version:
Is Bios Current Yes or No.
 
CPU:
Model:
Settings:
 
Memory:
Make:
Model:
Settings:
 
M.2 Devices:
1)
Make:
Model:
2)
Make:
Model:
3)
Make:
Model:
 
GPU/Video:
Make:
Model:
Driver Version:
AGE:
 
GPU/Video:
Make:
Model:
Driver Version:
AGE:
 
Monitor:
Make:
Model:
Video Cables Used:
Type:
Versions:
AGE
 
Monitor:
Make:
Model:
Video Cables Used:
Type:
Versions:
AGE
 
TV If Used:
Make:
Model:
Video Cables Used:
Type:
Versions:
AGE
 
Keyboard:
Make:
Model:
AGE:
 
Mouse:
Make:
Model:
AGE:
 
PSU:
Make:
Model:
AGE:
 
Other PCI/PCIe installed Devices:
Make:
Model:
Slot Number Installed:
Driver Version:
 
Other PCI/PCIe installed Devices:
Make:
Model:
Slot Number Installed:
Driver Version:
 
OS:
Version:
Service Pack Level:
Windows/Patch Level:
 

Is a DP cable neccesary? I'm using a dual link and HDMI for a 144 Hz monitor

It's a brand new computer, I can't get anything to display so drivers and bios version is how it came out of box

Did you connect your Video Cable to the Motherboards Video Port *(DP)
Looking for a number like this for your Memory (CMK16GX4M2B3000C15)
Use Only One Ram Stick and put it in Slot 2 and leave the rest empty.
What are you using for a CPU Cooler?

I tried rebooting a couple times and taking out RAM but no luck

I've swapped ram slots, made sure they're in 2 and 4.
GPU light and fan comes on, CPU cooler starts spinning

Still can't use USB

Do any of the numbers that come before the 79 error matter?

Still no luck

Remove the GTX 1080 Ti and test only with the MB

Do you receive code 79 on the secondary bios?

I do my first boot on a new MB using only the build in graphics using a standard keyboard and add the video card later
 
try both positions on the MB bios switch
 
I have used a cell phone camera on slow motion to collect data on the BIOS codes and the beeps.
 
 
 

Ellifer
CMK16GX4M2B3000C15 RAM model

 
So I spent the day building greeting the Fed-Ex, UPS and Amazon guys awaiting for all the parts to arrive for a new build.  After spending the afternoon assembling everything together, I finally got to try it out.  
 
Error code 79.  Switched RAM in the around (2 to 4, then just one lone stick in #2). 
 
Error code 53 with just one stick.
 
Searched the forums and found this thread.  Then realized I have the exact same RAM?  Corsair Vengeance LPX CMK16GX4M2B3000C15
 
Other specs:
i7 8700k CPU
2×8gb DDR4 RAM 3000 mhz
1070 sc
Z370 FTW mobo 
 
Is the RAM causing this error?
 
 
 

In my case, Error code 79 is caused by running a Win10 from SSD-B (CSM-off) over the BIOS setting for SSD-A's Win7 (CSM-on).
Did OP do a similar thing?