Official recommended requirements are as follows on Steam (as always, to be taken not with a pinch, but a whole handful of salt...)
OS: 64-bit: Win 7, Win 8
Processor: Intel Core i7-3770, 3.4 GHz | AMD FX-8350, 4.0 GHz
Memory: 8 GB RAM
Graphics: NVIDIA GeForce GTX 660 | AMD Radeon HD 7950
DirectX: Version 11
Network: Broadband Internet connection
Hard Drive: 40 GB available space
Ignoring them, as always, and getting on with my thoughts...
whale123 :
Graphics card: NVIDIA GeForce GTX 660 2GB
CPU: Intel Core i5 3470
Memory: 8GB DDR3 1333mhz (1x8GB)
Motherboard: Gigabyte B75M-D2V
medium-high should manage to keep 60fps at 1080p; hardware is kinda ok (could be better, although it's not bad already), but that 8GB single channel memory @ 1333Mhz isn't going to let everything perform at its fullest, especially on a slightly old chipset.
ZeusGamer :
I've just ordered this game and i can't download it till I'm off work. Can somebody tell my which specs can I play this game at? My spec list are my signature.
Provided the game already supports crossfire, you'll probably max it out.
If it doesn't and you need to run the game in single-card mode, you might be able to still max it out if that 280x is a 4GB VRAM model, otherwise high. The maxed out settings alone are considered additional content, you even need to download the high-def textures separately from the game...