You mean someone else with ASUS P8Z77-V + 7600GS + Triple Monitors?! Google it. Here's the Multiple Monitors Club -> http://www.overclock.net/t/631774/multiple-monitors-club/280
I know the ASUS P8Z77-V supports (2) and I've seen conflicting information with (3) even with the IB; see - http://news.softpedia.com/news/Intel-Ivy-Bridge-Won-t-Support-Three-Displays-Easily-262061.shtml
I know the XFX Double D FX-775A-ZDP4 Radeon HD 7750 supports (3) as stated.
I can only assume
ASUS P8Z77-V (2) + 7600GS (1) = Triple Monitors, but I see no reason to think it cannot be done.
We run one to three monitors off our old HD 5770 at the office, and my daughter's gaming rig is more 'typical gaming' with 3-WAY SLI and three monitors. 99%+ of the triple monitor set-ups involve one or multiple discrete GPUs. I never use the iGPU on any system with more than (1) display.