HP pro 3400 wont boot with gpu

[Andronic]

So i recently upgrade my brothers pc by instaling a gt710 into his pc witch caused a lot of issues 

 first of all this is the problem eveytime i have to boot into windows i have to spam the delete key witch brings me to this menu here no button works only makes noise, after like 2-3 minutes the pc boots into windows like normal and the pc uses the gpu with no problem, i tried to fix this and someone recommended me to get a newer gpu so i got him a gtx 1070 ti even tho i knew it was a bottlekneck for the cpu but it will work since he will upgrade in the future, but now i have the same problem as with the first gpu and even more annoying is that sometimes the pc wont even boot it will go to the same menu then go black screen beep like 4 times and then do nothing it will just stay on without nothing,if i take out the gpu the pc boots into windows in seconds

[Andronic]

Update: i was able to boot twice into windows with the gtx 1070 ti even tho i had that issue i kept spaming the delete button and restarted if the pc didnt boot and it booted up twice but this is gettinf annoying i dont have time to stay 1 hour each time i want to boot up the computer

[Andronic]

As you can see i was able to boot into windows after just spaming the delete button waiting and if not booten shuting the pc down and trying again