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FIRMWARE:
Software stored in read-only memory (ROM) or programmable ROM (PROM). Easier to change than hardware but harder than software stored on disk. Firmware is often responsible for the behaviour of a system when it is first switched on. A typical example would be a "monitor" program in a microcomputer which loads the full operating system from disk or from a network and then passes control to it.
If your writer is specified to write at 4x then it should without question, especially considering it is a well-known brand like Philips.
Perhaps there is something wrong in your system that is stopiing you from writing at 4x? Have you defraged your hard-drive? Do you run any programs whilst burning? How fast is your cpu? Do you burn MP3's a lot in Nero?
All the Best :-)
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