Hi guys, ok so recently my tower has been making this big grinding/riving noise. And i have to give the tower a little love tap fevery so often or it to stop. Are these signs of the HD giving out or a heat sink? I tried to listen in closely and cant really tell where it is coming from, but it does seem to be from the front of the case. Specs: P4 3.0ghz Intel d865gbfl series mobo 450w ps 90g maxtor hd visiontek hd 2600xt 512mb 2g pc3200 ddr400 kingston ram xp pro Feedback appreciated, thanks for your time.