As of V4 everything was unified into one board, except the power supply.
To this day, the PS2 holds the record for the most consoles sold in a single day as well as the record for most consoles sold in launch day in America.
The PS2 launch seemed unimpressive and gaffe-prone, compared to the well-planned launch of the Sega Dreamcast, which was making a genuine attempt to woo developers and which had better launch titles.
In September 2004 Sony unveiled the third major hardware revision (V12, model number SCPH-70000).
Later hardware revisions had better compatibility with PlayStation games (Metal Gear Solid: VR Missons works on most silver models).
This allowed the PS2 to tap the large install base established by the PlayStation.
A product named HD Connect can be soldered into the unit giving hard drive support though.
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