NVCUVID decoder RAM consumption on gtx970

Hi guys,

I want to add NVCUVID decoders to video surveillance system, so need many decoders working in parallel.
On gt720 25 decoders for 1920x1080 H.264 streams requires 800MB RAM (probably including dynamic video memory), on gtx970 it requires 2600MB RAM. Video memory consumption is the same.

Is any way to reduce RAM requirements on Maxwell?

Thanks.

P.S.
Tested on CUDA SDK 6.5, 7.5
Windows 10
Driver version 358.50