The 3k3y team finished their work on the "universal" 3k3y daughterboard for
playstation 3 models 25xx/3xxx/4xxx and is now ready for production.
From now on all SATA (Slim and Super Slim PS3) use only 2 daughterboards.
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Source: http://nforush.net/forum/ps3-news-and-information/3k3y-universal-daughterboard-for-25xx3xxx4xxx/