Hi,

I've just had to replace my PSU after the last one started smoking. My new
PSU only has a single fan (the last had 2) and as a result I've noticed that
my PC temperatures are up.

My motherboard goes up to 41C and the CPU to around 61C when in use. I have
a Pentium4 2.66

So, I've decided that a case fan is the way to go.

I've chosen a fan:

http://tinyurl.com/2fle8k which is the correct size and has the correct
connections.

However, having looked at the rear of my ATX case I'm a little unsure - I
was expecting lots of holes or a removable section - but I have some grilles
(marked 'Dual fan system'). The lower grill is for a 70mm fan and the upper
for an 80mm (the one I've chosen, right)?

The case looks like this from the outside:

http://tinyurl.com/3c35vq

and like this from the inside:

http://tinyurl.com/2qheg5

Note that the grilles have a kind of metal canopy over them - I presume to
prevent dust ingress?

So - how would I fit the fan? Do I simply hold it against the inside of the
case and screw from the outside? The picture of the fan shows a 'layered'
surround of the fan - are the screws really long and they simply screw
through the case, through the first layer and then the second?

I can also only locate 2 holes (and that's all they are - holes) for screws
I presume. Will that suffice?

Or am I wrong and I need to remove something (there doesn't seem to be
anything to remove though).

I'm sure it's a very simple job but I don't want to make a silly mistake!

Thanks,

Kroma