3 gpu msi gtx1050ti not working

Hi ALL.
I use 6 GPU GTX 1050TI MSI and mining by FLYPOOL (Zcash) then windows STOP and pool notworking
After I replace 6 GPU GTX 1050TI GIGABYTE > windows and pool working.
I try 2 GPU GTX 1050TI MSI > windows and pool working
I try 3 GPU GTX 1050TI MSI > windows and pool NOTworking.

Please Help me to use 6 GPU MSI. Thank a lot !Err

Your oc still to be too high

I OC set to Min for 3 GPU but Windows STOP.

Is that Windows 7 or a stripped down windows 10 ?

I Try Win 7 and Win 10, It too.