On a well specced well cared for system 'render freezes' should not happen. This has only happened to me as a result of overheating.

My tip is to first check your cpu temps.

__________________
Lowering the tone of video since 2004.

www.zaskarfilms.com You tube channel 'zaskarfilms'
JVC DV5001e (big cam), Sony PC6E (tiny cam), Vinten pro5, PAG light, SM58, Sony ECM50, Sony C-76, 0.5x convertors for sony, Rode video mic, Vegas 7.

Ditto Mark - PLUS look at the CPU fan and PS Fan. Make sure you have more than just daylight!!! - I had a render-failover issue. Reason? Clogged-up exhausts on PS and CPU fins was NOT visible through fan blades - I S!"£!t you not!

Grazie