Would there be a difference?

[Edgar R. Zakarian]

If i used a Corsair h100i  for example,

and used standard aerocool sicleflow fans 120mm,

what would the difference be in temps??

I might get a radiator cheap, fans not included, but i have  2 120mm fans.

[MafiaMoe]

There will be a noticeable difference.  From the design of those fan blades it looks like the aerocool sicleflow fans might perform better than most standard case fans, but fans built specifically to create high static pressure will still perform much better.

[Chujitsu]

Yes .. the aerocool sicleflow fans were built for air flow not static pressure so in other words it will have trouble pulling or pushing the hot air that the rads will be giving off.  Look for fans that optimized for static pressure for rads.

[Edgar R. Zakarian]

I understand, but how many degrees Would The difference be. If its 2-5 I wont bother paying a new fan.

[Chujitsu]

well at idle it won't be a big difference in temps but at full load there will be a significant difference in temps.  I don't have exact numbers but I'm sure if you do some goggle-ing you're find some tests done.