Awwwww yeeeeeeeeah.
http://www.pcgamer.com/2011/05/19/arma-3-announced-releasing-summer-2012-first-screenshots/
Coming Summer 2012
Specs:
OS – Windows 7 / Vista
CPU – Intel Core i5 or AMD Athlon Phenom X4 or faster
GPU – Nvidia Geforce GTX 260 or ATI Radeon HD 5770, shader Model 3 and 896 MB VRAM, or faster
RAM – 2 GB
HDD – 15 GB free space
DVD – Dual Layer compatible
DirectX® – 10
No idea if those are Recommended or minimum.
http://www.pcgamer.com/2011/05/19/arma-3-announced-releasing-summer-2012-first-screenshots/
Coming Summer 2012

Specs:
OS – Windows 7 / Vista
CPU – Intel Core i5 or AMD Athlon Phenom X4 or faster
GPU – Nvidia Geforce GTX 260 or ATI Radeon HD 5770, shader Model 3 and 896 MB VRAM, or faster
RAM – 2 GB
HDD – 15 GB free space
DVD – Dual Layer compatible
DirectX® – 10
No idea if those are Recommended or minimum.