CPU/Motherboard troubleshooting help

[DyslexicSmile]

I'm attempting to build a new computer, but am having trouble getting any video whatsoever. I've attempted having the minimum components connected, such as motherboard, CPU, and GPU. What I have connected is all new and already been exchanged at the store, as I originally believed the issue to be a bad motherboard or processor. What I have is:

CPU: AMD Ryzen 7 1700x
Motherboard: MSI x370 Gaming pro carbon
GPU: tried onboard motherboard GPU and also PCI-e GeForce GTX1070
Power: 850w EVGA and Corsair CX750w

I've disconnected everything and reconnected everything several times, so I know its not an issue with something not being connected correctly.

When I turn the PC on I get 3 long beeps, then nothing. If I have a stick of memory in, then I get 4 long beeps instead.

I've used 2 different power supplies, exchanged the motherboard and CPU, but am getting the same results.

At the moment I am at a complete loss. Any help or troubleshooting ideas would be greatly appreciated. Also let me know if any other information is needed for assistance.

 

[moogle89]

1.Try clearing the CMOS (Look in the motherboard manual)
2. Re-seat the RAM, try using one stick only;
see if the GPU is all the way in and its cables are plugged in
check if CPU has power (there is a seperate cable that powers up the CPU)
3. Turn your monitor on and off (some monitors have a hibernation mode that does not wake up from the BIOS message alone)

 

[DyslexicSmile]

1.Try clearing the CMOS (Look in the motherboard manual)
2. Re-seat the RAM, try using one stick only;
see if the GPU is all the way in and its cables are plugged in
check if CPU has power (there is a seperate cable that powers up the CPU)
3. Turn your monitor on and off (some monitors have a hibernation mode that does not wake up from the BIOS message alone)

I have tried all of those except for Clearing the CMOS. I will try that when I get home from work and let you know how it went. Thank you for the reply!

 

[DyslexicSmile]

Unfortunately clearing the CMOS did not do the trick, however a friend of mine was also browsing the forums here and thinks the RAM I have may not be compatible. They also mentioned the board needs 1 stick of RAM in to work. The RAM I purchased is Patriot Viper DDR4 2666MHz 8GBx2

 

[moogle89]

Unfortunately clearing the CMOS did not do the trick, however a friend of mine was also browsing the forums here and thinks the RAM I have may not be compatible. They also mentioned the board needs 1 stick of RAM in to work. The RAM I purchased is Patriot Viper DDR4 2666MHz 8GBx2

That could be the culprit too. Buy a new RAM and try it out, seems like a good idea.
You are looking for DDR4-3200+ RAM. Newer motherboards are very picky about what type of memory they accept ^^