I doubt it will, since a non UEFI BIOS environment will only lead to a black screen in spite of your OS booting into GUI. On another note, given the age of your system/platform, I also doubt your PSU is capable of delivering the necessary power to the entire system with a GTX1070 dropped in.
IN any case, please list your specs like so:
CPU:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS: