一、定位高端市场的 RD400芯片RD400从一开始就定位于高端市场,原因就在于其采用了 CrossFire 技术。在规格上,可支持采用 LGA775封装的 Pentium 4和 Pentium D 处理器,最高支持1066MHz FSB。它内建了20条 PCI-E 通道,通常情况下支持4GB 双通道 DDR 400内存或者 DDR2 677内存,在搭配1066MHz FSB 的 P4XE 处理器时,内存控制器最高支持 DDR2 800内存,它的20条 PCI-E 通道中,有16条是为显卡提供的图形接口,剩下的一条为 PCI-E×1扩展接口。 First, locate the high-end market, RD400 chip RD400 from the beginning positioned in the high-end market, because it uses CrossFire technology. The specification supports the Pentium 4 and Pentium D processors in the LGA775 package and supports up to 1066MHz FSB. It has built-in 20 PCI-E lanes, typically supporting 4GB of dual channel DDR 400 memory or DDR2 677 memory. With a P4XE processor running at 1066MHz FSB, the memory controller supports up to DDR2 800 memory and its 20 PCI -E channel, there are 16 graphics interface for the graphics card, the remaining one for the PCI-E × 1 expansion interface.