Summary
In July 2007 Sony started shipping a revision of the slimline PlayStation 2 (SCPH-7900x) featuring a reduced weight of 600 grams compared to 900 g of the SCPH-7700x, achieved through a reduction in parts. The unit also uses a smaller motherboard as well as a custom ASIC which houses the Emotion Engine, Graphics Synthesizer, and the RDRAM. The AC adaptor's weight was reduced to 250 g from the previous 350 g.[8] Another refinement of the slimline PlayStation 2 (SCPH-9000x) was released in Japan on November 22, 2007.[9] As well some cosmetic changes, the design of the hardware was overhauled, incorporating the power supply into the console itself like the original PlayStation 2 revisions; this also reduces the total weight to 720 grams (25 oz). SCPH-9000x series consoles manufactured after the third quarter of 2008 as the last revision of the PlayStation 2, some changes were (indicated by date code 8C) incorporate a revised BIOS, which disables an exploit present in all older models that allowed homebrew applications to be launched from a memory card.
