Hello everyone, I was hoping someone might have some insight for me about why my rig may be freezing.

I have
H97 anniversary mobo.
4gig RAM.
Cheapo CPU .
6 MSI RX 480 Gaming X 8GB - Stock settings and -86/-96 undervolt for ETH and XMR respectively when the rig was stable.
No custom GPU BIOS.
Windows 10.
Virtual Memory set to 16GB min -> 32GB max.

The rig will freeze if I have 5 or 6 GPUs attached. The driver will constant fail, freeze, and sometimes reset the pc. The rigs will freeze mining Monero and Ethereum.

I have done a full system reset. Installed only the necessary drivers plus GPU drivers, set the virtual memory to 16gb min and 32gb max. What else may I be missing.

I appreciate any help.  Thank you.

*EDITED for additional info.*

List of possible problems:

• Mobo BIOS may need updating - Have not tested yet.
• Change mobo to Gen 1/2/3 - I had it on auto with the continuous crashing. Currently on Gen 2, and still crashing but not as often. Need to test Gen 1 and Gen 3.
  
• Not enough RAM - I don't think this is the problem. My other 480 rig has 4GB of RAM and runs ETH and XMR mining flawlessly
• PSU - Tested, good.
• 3 risers on 1 SATA power line - None of my risers were 3 to a line
• Drivers - Tested different drivers versions. Each version crashes approximately around the same time. I don't think the driver is the problem.

I would also like to add that when I completed the reset of Windows 10, installed necessary drivers, and waiting for Windows 10 to complete updating, I now have 4 of the GPUs hashing with no freeze problems. Which was my setup previously before I added GPU 5 and 6.  I would need to double check and see if now that the system may seem stable, I can try GPU 5 and/or 6 to see how the rig functions.
This part just seemed weird to me. I can't explain it.

Thank you everyone. Will keep updating.

I'll be working on the miner in a few days. I'll keep this post updated for reference in case someone decides to search for themselves.