what is your full pc configuration? do not leave out any parts model name and number.
from the 3dmark page it looks like the msi gfx card in the "gaming pc" was factory overclocked, which is how it got higher scores.
your pc:
Giga-Byte Technology Co., Ltd.
Core clock
1,076 MHz
Memory bus clock
1,753 MHz
Driver name
NVIDIA GeForce GTX 970
Driver version
10.18.13.5330
"gaming pc":
NVIDIA GeForce GTX 970
Vendor
Micro-Star International Co ., Ltd.
Core clock
1,114 MHz
Memory bus clock
1,753 MHz
Driver name
NVIDIA GeForce GTX 970
Driver version
9.18.13.5306
Driver status
FM Approved
the gaming pc also had a crucial SSD, not sure if it helped.