I’m having a similar problem with Sony Vegas Movie Studio Platinum 8.0. I’m getting the low memory error message while rendering.
My spec is as follows:
Fujitsu P9900 0-Watt
Windows 7 Professional x64
Intel Core i5 – 3.2 GHz – Dual Core
4 GB Memory
Working with AVCHD files.
The memory usage while rendering never exceeds 1.9 GB, yet I still get this error message!
I can render projects with over an hour of content sucessfully (if a little slowly) on my old Windows XP Home PC, which has 2 GB of memory.