IHS estimates the optical drive in the PS4 costs $28, compared to $66 for the latest revision of the PlayStation 3, itself a cost-reduced model called the CECH-2001A. Sony trimmed another $10 by integrating a number of discrete and passive components, IHS said.According to IHS, the single most expensive component in the PS4 is the APU, it has an estimated cost of $100. Next is the DRAM at $88, the HDD at $37, and the optical drive at $28.
The PS4 also shaved five dollars in mechanical parts compared to the PS3. The hard drive in the PS4 is a 500 GByte model compared to just 120 GB for the PlayStation 3, but was still one dollar cheaper, thanks to efficiencies in hard drive manufacturing.
Source: EE Times