Epson ActionTower 3000 Computer - Manuel (Page 51)

Note
To use an external display adapter in an expansion slot, you
must disable the built-in VGA adapter.
External cache size jumper Settings
External cache
Size* J23 J24 J25 J26
64KB 1-2 1-2 off 2-3
128KB 2-3 1-2 1-2 1-2
256KB 2-3 2-3 2-3 2-3
*
If you have no external cache, the setting of these jumpers does not
matter.
Setting the Jumpers
If you need to change any jumper settings, follow these steps:
1. Refer to the illustration on page 3-5 to locate the jumpers.
2. If the jumper you need to change is blocked by any option
cards installed in your computer, you need to remove the
card(s) to access the jumper. See page 3-18.
3-8 Installing and Removing Options