Question- PC Specs To Multibox 4 Account In 1080p

so yea.. like the title says. Just wondering what pc specs you need to multibox diablo in 1080p.. getting kind of tired of 600x800 thanks!

i have 8 gb of ram
and my processor is AMD Phenom (tm) II X4 955 3.2 GHz

[Mahther]

These are my specs. I use lax's window layout which is 4 stacked on one monitor with a fully functional dxnothing window that shows all accounts in 4 corners on a second monitor, and watch movies or streams while I play on a third monitor. All of my game windows are at 1920x1080 and set to 30 fps each. Not sure if any of that matters for performance or not but figured I'd share it just in case.

OS: Windows 7 Home Premium 64
MB: ASUS M5A97 EVO AM3+
CPU: AMD Phenom II X4 975 Black Edition Deneb 3.6GHz (Overclocked to 4GHz) Socket AM3 125W Quad-Core HDZ975FBGMBOX
Video: XFX Double D FX797GTDFC Radeon HD 7970 GHz Edition 3GB 384-bit GDDR5 PCI Express 3.0 x16
RAM: G.SKILL Sniper Series 16GB DDR3 1866 F3-14900CL9D-8GBSR
HD: OCZ Agility 3 AGT3-25SAT3-240G 240GB SATA III (SSD)