Modification Instructions: Asus A7V as Overclocking Basis
Before we go into the details of this modification we must establish the prerequisites. In principle it works with every Asus A7V that does not have an additional DIP switch for the multiplier settings. This is easy to determine by checking whether there is no second DIP switch next to the one for the Front Side Bus clock. But the board layout already contains the connectors for the additional DIP switch.
Regarding the CPU (Duron or Thunderbird) there is only one thing to verify: all contacts of the L1 bridges must be closed. According to our experience the L1 bridges are closed on most of the currently shipped processors. If this is not the case, however, the contacts must be closed carefully using a conductive pen. When closing the contacts manually, it is important to make sure not to create any connection between the individual bridges.
The picture below shows a Duron that was manufactured with closed L1 contact bridges.
We must also point out here that despite contrary reports, the successful unblocking of the multiplier is not trivial by any means. Besides the necessary components, the following modification requires a certain skill with the soldering iron. The changes on the motherboard must be made carefully and with precision, otherwise the board might not work anymore due to wrong connections (short circuits).