How to troubleshoot Bluetooth detection and connectivity problem. After you install Windows XP Service Pack 2 (SP2), a Bluetooth device that previously functioned correctly in Windows XP SP1 and that supported Bluetooth wireless devices may not function correctly.
This article discusses how to troubleshoot:Bluetooth device detection issues.Service detection issues.Device detection and connectivity issues. This article contains steps to troubleshoot your Bluetooth device if your device stops working after you install Windows XP Service Pack 2. Basic troubleshooting. SDRAM latency. SDRAM latency refers to delays in transmitting data between the CPU and SDRAM.
SDRAM latency is often measured in memory bus clock cycles. However, the CPU operates faster than the memory, so it must wait while the proper segment of memory is located and read, before the data can be sent back. This also adds to the total SDRAM latency. DDR2 SDRAM. PC2-6400 DDR2 SO-DIMM (for notebooks) DDR2 SDRAM is a double data rate synchronous dynamic random-access memory interface.
It superseded the original DDR SDRAM specification, and has since been superseded by DDR3 SDRAM. DDR2 DIMMs are neither forward compatible with DDR3 nor backward compatible with DDR. In addition to double pumping the data bus as in DDR SDRAM (transferring data on the rising and falling edges of the bus clock signal), DDR2 allows higher bus speed and requires lower power by running the internal clock at half the speed of the data bus. The two factors combine to produce a total of four data transfers per internal clock cycle.