coling video card more or not?

[zerocool15]

i have 2 small fans
i say about 40 mm fan each
i need to cool my video card
so one fan is on it now
but the other one i don't know where to place him..
i thoght to place him on the other fan
a fan on fan that connected to video card..so it's good idea?
and if it's not..where to place it?
to cool the memory?
help..