@poppysmummy5
While we cannot advise you to purchase a specific piece of hardware, we can show you the minimum requirements for the game (which are higher than the requirements to web browse) and you can use that info to inform your purchasing decision -
The Sims 4 MINIMUM SPECS:
OS: Windows XP (SP3), Windows Vista (SP2), Windows 7 (SP1), Windows 8, Windows 8.1, or Windows 10
CPU: 1.8 GHz Intel Core 2 Duo, AMD Athlon 64 Dual-Core 4000+ or equivalent (For computers using built-in graphics chipsets, the game requires 2.0 GHz Intel Core 2 Duo, 2.0 GHz AMD Turion 64 X2 TL-62 or equivalent)
RAM: At least 2 GB RAM
HARD DRIVE: At least 3 GB of free space (14 GB if installing with The Sims 4) with at least 1 GB additional space for custom content and saved games
VIDEO: 128 MB of Video RAM and support for Pixel Shader 3.0. Supported Video Cards: NVIDIA GeForce 6600 or better, ATI Radeon X1300 or better, Intel GMA X4500 or better
DIRECTX: DirectX 9.0c compatible
SOUND CARD: DirectX 9.0c Compatible
INPUT: Keyboard and Mouse
ONLINE REQUIREMENTS: Internet connection required for product activation.