Error -6086 With Lowest Buffer Size

[DLINDSA21]

"The operating system held off interupts for too long. If this occurs frequently, try increasing the "H/W Buffer size" in the playback engine (-6086) "

I am trying to use zero latency. The lowest buffer size I am able to recored at without this error interuption is 128. Of course the higher the buffer size the more delay you recieve while recording.


Im running Pro Tools 6.9 on

Power Mac G5
CPU Type: PowerPC 970 (2.2)
Number Of CPUs: 1
CPU Speed: 1.6 GHz
L2 Cache (per CPU): 512 KB
Memory: 2 GB
Bus Speed: 800 MHz
Boot ROM Version: 5.0.1f1

Digi 002



What is it that I need to override this error and recored with the lowest buffer size of 64? More memory, newer version of pro tools?