经常有朋友问我Realtek瑞昱高清音频解码器ALC883/885/888那个更好？
关于目前Realtek比较常见的HD音效解决方案Realtek ALC885/888你了解多少？到底是ALC888好，还是ALC885好？看了下面的内容你就明白了：
HKEPC报道：在2006年4月初台北春季IDF上，全球最大整合音频芯片商Realtek展示了新一代高清音频芯片，包括高端版ALC885、低端版ALC888和VoIP版ALC888 Telecom。
Realtek业务行销企划专案经理Chia-Che Tsai表示，包括Realtek主流产品ALC882/883在内的大多数现有音频芯片都没有通过微软WLP 3.0规格认证，无法取得Windows Vista的Premium认证logo，因此Realtek准备推出ALC885/888来满足这一缺口。
图：ALC885芯片
ALC885 HD Audio Codec将成为Realtek下一代高清音频芯片的旗舰式产品，通过Windows Vista Premium认证，DAC SNR和ADC SNR分别可达106dB和101dB，支持10个DAC通道和3个立体声ADC通道，最高支持192kHz采样和24bit PCM规格，支持7.1+2声道，并在全球首次提供对Full-Rate Lossless Content Protection（全速率失真内容保护）的支持，可为HD DVD的内容保护影片提供音频解码，否则影片的音效将被降低一个等级。
图：ALC888芯片
ALC888 HD Audio Codec则将是ALC885的低端版本，DAC SNR和ADC SNR分别降为98dB和95dB，只支持2个立体声ADC通道，但同样通过Windows Vista Premium认证，且与ALC885针脚兼容。
音频芯片商Realtek高清蓝图
ALC888 Telecom HD Audio Codec则针对VoIP应用设计，面向商用客户，可使传统电话支持公共交换电话网(PSTN)和以太网拨入，但不会与ALC885针脚兼容。
顺便收集一些Realtek网络控制器相关的资料：
到目前为止，Realtek PCI Express千兆网卡共有三个型号：RTL8111B、RTL8168B和RTL8111C。下面是每个型号的详细信息。
RTL811B:
Integrated 10/100/1000 transceiver
Auto-Negotiation with Next Page capability
Supports PCI Express? 1.0a
Supports pair swap/polarity/skew correction
Crossover Detection & Auto-Correction
Wake-on-LAN and remote wake-up support
Microsoft? NDIS5 Checksum Offload (IP, TCP, UDP) and Largesend Offload support
Supports Full Duplex flow control (IEEE 802.3x)
Fully compliant with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supports IEEE 802.1P Layer 2 Priority Encoding
Supports IEEE 802.1Q VLAN tagging
Serial EEPROM
Transmit/Receive on-chip buffer (8KB/16KB) support
Supports power down/link down power saving
Supports PCI Message Signaled Interrupt (MSI)
64-pin QFN package
RTL8168B:
Integrated 10/100/1000 transceiver
Auto-Negotiation with Next Page capability
Supports PCI Express? 1.0a
Supports pair swap/polarity/skew correction
Crossover Detection & Auto-Correction
Wake-on-LAN and remote wake-up support
Microsoft? NDIS5 Checksum Offload (IP, TCP, UDP) and Largesend Offload support
Supports Full Duplex flow control (IEEE 802.3x)
Fully compliant with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supports IEEE 802.1P Layer 2 Priority Encoding
Supports IEEE 802.1Q VLAN tagging
Serial EEPROM
Transmit/Receive on-chip buffer (8KB/16KB) support
Supports power down/link down power saving
Supports PCI Message Signaled Interrupt (MSI)
64-pin QFN package
RTL8111C :
Integrated 10/100/1000 transceiver
Auto-Negotiation with Next Page capability
Supports PCI Express? 1.1
Supports pair swap/polarity/skew correction
Crossover Detection & & Auto-Correction
Wake-on-LAN and remote wake-up support
Microsoft? NDIS5, NDIS6 Checksum Offload (IPv4, IPv6, TCP, UDP) and Segmentation Task-offload (Large send and Giant send) support
Supports Full Duplex flow control (IEEE 802.3x)
Fully compliant with IEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Supports IEEE 802.1P Layer 2 Priority Encoding
Supports IEEE 802.1Q VLAN tagging
Serial EEPROM
Transmit/Receive on-chip buffer support
Supports power down/link down power saving
Supports PCI MSI (Message Signaled Interrupt) and MSI-X
Supports Receive-Side Scaling (RSS)
64-pin QFN package (Green package)
Embeds an adaptive equalizer in PCI express PHY (PCB traces to reach 40 inches