We 4200 series hardware was update to 4300 series.

The hardware had update ,  is compatible 4200 series cards work together, 
If 4200 cards need augment more ch. work with together in 1 PC, please use 4300 software & new 4300 hardware driver, can work fine.

The 4200 series cards back had stitch, 4300 series is take out ( see the photo)