FEATURES Performance 2. FEA TURES 2.1.2 Specifications — Optional Components The following onboard components are optional at the time of purchase: • Onboard Audio: AC97 V2.1 compliant Audio Codec with 3D sound circuitry and sample rate conversion from 7kHz to 48kHz. 2.1.3 Performance • Concurrent PCI: Concurrent PCI allows multiple PCI transfers from PCI mas- ter busses to the memory and processor. • High-Speed Data Transfer Interface: IDE transfers using UltraDMA/33 Bus Master IDE can handle rates up to 33MB/s. This motherboard with its chipsetand support for UltraDMA/66 doubles the UltraDMA/33 burst transfer rate to66.6MB/s. UltraDMA/66 is backward compatible with both DMA/33 and DMAand with existing DMA devices and systems so there is no need to upgradecurrent EIDE/IDE drives and host systems. (UltraDMA/66 requires a 40-pin80-conductor cable to be enabled and/or for UltraDMA Mode 4.) • VCM/SDRAM Optimized Performance: This motherboard supports a new gen- eration memory, NEC’s 64Mb Virtual Channel Memory (VCM) SynchronousDynamic Random Access Memory (SDRAM), which is compatible to the indus-try standard SDRAM. The VCM’s core design provides up to 50% higherSDRAM speed at reduced power consumption of about 30%. This motherboardalso supports standard SDRAM, which increases the data transfer rate (1.064GB/smax using PC133-compliant SDRAMs and 800MB/s max using PC100-compli-ant SDRAMs).• New Compliancy: Both the BIOS and hardware levels of ASUSsmart series motherboards meet PC’99 compliancy. The new PC’99 require-ments for systems and components are based on the following high-level goals:Support for Plug and Play compatibility and power management for configuringand managing all system components, and 32-bit device drivers and installationprocedures for Windows 95/98/NT. Color-coded connectors and descriptive iconsmake identification easy as required by PC’99.

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