Filesystem vs. Postgres for images

Hello,

I am working on web portal. There are some ads. We have about 200 000
ads. Every ad have own directory called ID, where is 5 subdirectories
with various sizes of 5 images.

Filesystem is too slow. But I don't know, if I store these images into
postgres, performace will grow.

Second question is, what kind of hardware I need for storing in DB. Now
I have Intel(R) Pentium(R) 4 CPU 1.70GHz with 512MB RAM and 120GB HDD.

thanx for advices...

miso