Fusion: GPU memory full

I know Fusion is still a work in progress, so I'm trying to figure out if this GPU memory error is actually a GPU memory error, or if there's some other problem.
Currently I'm running about 30 nodes, including a couple luma keys, a delta key, some blurs and glows, and a particle system (with a birth rate of 1000 and a lifespan of 100). I add an Edge Detect, hook it up to the tree, and I get the error message (after which I have to restart the computer).
I'm also having a problem where it renders about half the clip and then freezes (the viewer, not the program). Maybe that's related?
Thanks for any help!
Zak
Currently I'm running about 30 nodes, including a couple luma keys, a delta key, some blurs and glows, and a particle system (with a birth rate of 1000 and a lifespan of 100). I add an Edge Detect, hook it up to the tree, and I get the error message (after which I have to restart the computer).
I'm also having a problem where it renders about half the clip and then freezes (the viewer, not the program). Maybe that's related?
Thanks for any help!
Zak