i found there are three levels in the nvida control pannel.
Is it related to CUDA’s performance?
Can I get the best performance through setting it to the highest level?
Another question is How to set it?
In my computer I have two GTX295 card, this means total 4 GPUs.
I added two lines into the section “Device” of xorg.conf as following
BusID "PCI:5:0:0" Option "RegistryDwords" "PowerMizerlevel=0x1"
and rebooted the computer, but the level is still the lowest one.
Who know how to set it?
btw, the PCIbus for 4 GPUs are
device #0 : PCI:5:0:0
device #1 : PCI:4:0:0
device #2 : PCI:8:0:0
device #3 : PCI:9:0:0
Why 5 is before 4?