Hi,
I found the below-given configuration to be recommended for sims 4 on the official website of EA:
Operating system: 64 Bit Windows 7, 8, 8.1, or 10
Processor: Intel Core i5 or faster, AMD Athlon X4
Memory (RAM): 4 GB RAM
Hard drive (free space): At least 9 GB of free space with at least 1 GB additional space for custom content and saved game
DVD drive: DVD-ROM drive required for installation from disc only
Graphics card (video): NVIDIA GTX 650 or better
Direct X version: DirectX 9.0c Compatible
Note: it's the recommended configuration, not the best configuration for playing Sims 4. Obviously, if your girlfriend is a casual gamer, then the laptop you mentioned above might be able to run the game but for sure you'll definitely not get a good experience.
Since you mentioned that your budget is near about $400, you can also check out "Dell Latitude E7440"
You can check it out here: https

/www.amazon.ca/Dell-Bluetooth-Professional-Certified-Refurbished/dp/B075Q5FFSX/
Let me know what you think
