Sony PCV-RX640 - Manual (Page 81)

To Insert an AGP Add-on card
Your computer has one open AGP expansion slot. This slot enables you to install an AGP card to enhance your system's
graphics capabilities. The length of the AGP card should not exceed 9.05 inches.
Note:
Installing an AGP card disables the internal graphics. Your system supports graphics cards that use AGP 4X standards.
Caution:
Observe the proper safety precautions when you upgrade your Sony computer. See Before you upgrade your
computer .
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