The PC system requirements for FIFA 18 have been released, Added the DirectX 12 support and DirectX11 for older video cards.  Fifa 18 will be releasing on 29th September, Available early release for Origin Access users.

To run this game at maximum settings at DirectX12 you need atleast quad-thread CPU. Which means older intel i3 or AMD equivalent should be able to run Fifa 18.

DIRECTX 12

MINIMUM SPECIFICATION
OS: Windows 10 – 64-Bit **
CPU: Intel i3 6300T or equivalent benchmark – Intel i3 4340, and Intel i3 4350 as alternatives.
AMD equivalent is AMD Athlon X4 870K – AMD FX-4350 and FX-4330 as alternatives.
RAM: 8GB
Hard Drive Space Required: 50.0 GB
Minimum Supported Video Cards: NVidia GeForce GTX 660 2GB or equivalent * AMD equivalent is Radeon RX 460/R9 270 /R7 370
DirectX: 12

RECOMMENDED SPECIFICATION
OS: Windows 10 – 64-Bit
CPU: Intel i3 6300T or equivalent benchmark – Intel i3 4340, and Intel i3 4350 as alternatives.
AMD equivalent is AMD Athlon X4 870K – AMD FX-4350 (5,272) and FX-4330 as alternatives.
RAM: 8GB
Hard Drive Space Required: 50.0 GB
Minimum Supported Video Cards: NVIDIA GeForce GTX 670 or AMD Radeon R9 270X
DirectX: 12.0

DIRECTX 11

MINIMUM SPECIFICATION
OS: Windows 7/8.1/10 – 64-Bit
CPU: Intel Core i3-2100 @ 3.1GHz or AMD Phenom II X4 965 @ 3.4 GHz
RAM: 8GB
Hard Drive Space Required: 50.0 GB
Minimum Supported Video Cards: NVIDIA GTX 460 or AMD Radeon R7 260
DirectX: 11.0

RECOMMENDED SPECIFICATION
OS: Windows 7/8.1/10 – 64-Bit
CPU: Intel i5-3550K @ 3.40GHz or AMD FX 8150 @ 3.6GHz
RAM: 8GB
Hard Drive Space Required: 50.0 GB
Minimum Supported Video Cards: NVIDIA GTX 660 or AMD Radeon R9 270
DirectX: 11.0