The forthcoming Remaster of Call of Duty: Modern Warfare for the PC have just been announced. There's no accurate information as the activision  hasn't been specified yet and it's not clear whether it intends to sell the remaster separately or wait till the after launch. This year the game don't call for the same level hardware as the last, this year its called Infinite Warfare.

According to vg247, Infinite Warfare requires hardware that's more capable with specs increasing almost across the board. Modern Warfare Remastered requires a 55GB hard drive space requirement, and will increase only with DLC and future updates.

Gamespot says, looking at the original version of Call of duty: Modern warfare back in 2007, you could play the game in Windows XP with just 512 MB of RAM, a Pentium 4, and and an Nvidia GeForce 6600 or ATI Radeon 9800 Pro. This november Modern warfare launches alongside Infinite warfare which is available only with premium versions of that game. To have a better understanding of the specs, you can have have a look at specs for the the system requirements to play the games:

Call of Duty: Modern Warfare Remastered

OS: Windows 7 64-bit / Windows 8 64-bit / Windows 8.1 64-bit / Windows 10 64-bit

Processor: Intel Core i3-530 @ 2.93 GHz / AMD Phenom II X4 810 @ 2.80 GHz

Memory: 6 GB RAM

Graphics: Nvidia GeForce GTS 450 @ 1 GB / ATI Radeon HD 7850 @ 1 GB

DirectX: Version 11

Network: Broadband internet connection

Hard drive: 55 GB available space at launch (more space will be required for updates, DLC, etc.)

Sound Card: DirectX-compatible

Call of Duty: Infinite Warfare

OS: Windows 7 64-Bit or later

Processor: Intel Core i3-3225 @ 3.30GHz or equivalent

Memory: 8 GB RAM

Graphics: Nvidia GeForce GTX 660 2 GB / AMD Radeon HD 7850 2 GB

DirectX: Version 11

Network: Broadband internet connection

Storage: 70 GB available space (disc space requirement may change over time)

Sound Card: DirectX 11-compatible