Very strange problem / slow read/write

I’m experiencing an extremely weird problem with my drive, whose exact model/name I don’t have, even after checking the official handbook of the desktop.

It was working picture perfect for about two years. Now all of a sudden, whenever I have to read/write to a CD, it’s really really slow; not just that, but it basically slows my entire PC to a little less than a complete halt.

To put it in perspective, it’s almost as if all my RAM gets guzzled down whenever a CD/DVD enters my drive.

I’ve already made sure DMA is enabled…

I know it could be a hardware problem but any ideas?