Looks like a 3+1 phase VRM on that board.
You might get what you think is pretty high...maybe 4.5G. But between the processor throttling itself to stay within it's 95w TDP (unless the BIOS has a setting to disable APM) and/or the VRM overheating it will throttle under load. Short-duration transient process loads, the kind you get in most day-to-day Windows tasks and in games, don't have opportunity to get the the VRM super hot so it will still work pretty nicely and give a 'smoother' feel to Windows. You can help things by getting some Enzo glue-on heatsinks and putting them on the FET's, but don't expect to get that kind of performance for a 2 hour video encoding.
So sure, it's still worth it to try.