3 Questions:kHs, No Fan RPM, Speed

[hashcat_rules:D]

Hey folks,

I have two GTX 970 on SLI.



After I've started oclHashcat with a WPA hash I was wondering the following:

1.- How many hashes per second represents 296.4 kH/s, or how many hashes are 1kH/s? 
I'm pretty sure this has been already answered but I could not find the answer around.
2.- Why the GPU#2 is showing 0rpm?
3.- I'm having a decent cracking speed?. 
I've installed everything but I'm not sure if that's a decent speed or not. Since I every time I do a benchmark, my screen goes black and just stops until I do a hard reset, so I'm not sure if everything is working as expected or not.

Thanks!