Thermaltake Water 2.0 Performer Inquiries about cooling

I'm sorry if this is the wrong thread. It's related to my CPU anyway

I replaced my i7 870's stock cooler with a Thermaltake Water 2.0 Performer

I don't intend to overclock until all my questions are answered.

I had some complications with it. I couldn't use the Y - Cable and plug both fan cables through the Y - Cable into my motherboard but since it's a branded Lenovo motherboard my technician said it would overload the motherboard since it wasn't meant for big fans requiring power. It's a working computer not a gaming computer. But I've turned it into a beast anyways.

*BOTH FANS ARE PWM*
BOTH ARE 1200 - 2000 RPM rated

So instead I got some adapters and BOTH FANS are plugged individually straight to my 800W power supply.

My question is, these used to be PWM fans but I plugged them directly into the power supply: How fast are they spinning? I can't tell because it's not connected to my motherboard. My dad says they are running at maximum. I just want to make sure, because when I overclock it can't spin faster if my processor needs it. If its PWM isn't gonna work then I at least need to know if it's running at maximum power and speed so my processor won't overheat. I don't care about it's noise, it's damn quiet.

Thanks in advance