Adding external airflow to an active cooling element won't help it until the airflow (in CFM) is winning over the airflow the cooling unit already provides. It's like if you were pushing one of those centrifuge things at a park and you attach something to help spin it. It's not going to help you spin the ride any faster, it'll just help you make it easier to spin it.
What I mean by the second statement is that flowing air does a better job at heat transfer than slower cooler air. If you were in still water at 65F, it's not going to cool you off faster than water that's flowing at 75F. Or it's like wind chill. 10F with wind can be the equivalent of -30F with no wind.
I already said the cold air will be moving quickly.
I understand science well...i'm really not trying to argue i just thnk we r finally on the same page.
I'm not going to decrease the amount of airflow stock computer fans would provide...that would just be silly willy.
So even just sticking with the stock airflow, throwing in cold will help. I'm assuming 250cfm is more than computer case fans provide anyways.
Maybe i am underestimating how much air a pc fan can actually move, but they r weak and can't handle much resistance. Unlike a high torque inline fan.
Until summer hits i don't have to worry about heat cause my cold room is around 30F right now with it being close to 0F outside.
Like others have said to me, computers are ment to be ran at fairly high temps anyways, but keeping it cool is an easy insurance policy.
Honestly i just like thinking outside the box and trying stuff out just to see if it works. I'm huge on experimenting but sometimes it doesn't really get you much progress, just knowledge.