V5 introduces minor internal changes and the only difference between V6 (sometimes called V5.1) and V5 is the orientation of the Power/Reset switch board connector, which was reversed to prevent the use of no-solder modchips.
When the PlayStation 2 launched in Japan in March 2000, Sony sold 980,000 units over the opening weekend.
Developers also complained that it was difficult to develop for the system, with little in the way of reference material from Sony for its exotic architecture.
Currently, most people just use V12 for both models, or V12 for the old model and V13 for the newer one.
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It was not until late 2001 that the Microsoft Xbox became the second console with (non-standard) USB and DVD support.
During one week in November, sales in the entire country of Britain totalled 6,000 units - compared to 70,000 a few weeks prior.
In September of that year, in time for the launch of Grand Theft Auto: San Andreas (the best-selling game during the 2004 Holiday season), Sony revealed a new, smaller PS2 (see Hardware revisions).
In preparation for the launch of a new, slimmer PlayStation 2 model (SCPH-70000), Sony had stopped making the older PS2 model (SCPH-5000x) sometime during the summer of 2004 to let the distribution channel empty out stock of the units.
PS2's opening day console sales eclipsed the previous record of 225,000 made by the Sega Dreamcast in 1999.
There are also some disputes on the numbering for this PS2 version, since there are actually two sub-versions of the SCPH-70000.
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.
