第二个是Scalable Control Fabric,也就是控制平面,主要是温度,电源管理,测试,安全和第三方IP的控制; SDF连接了核心,以及周边设备例如内存控制器和IO控制器; SDF上的时钟是Coherent AMD socKet Extender简称为CAKE;当前的CAKE时钟和DRAM的时钟相同以消除时钟交叉延时; SDF上有两种SerDes,IFOP和IFIS。 IF On Package,...
Supporting this theory is the fact that the "Genoa" sIOD has a 50% wider memory I/O (12-channel DDR5), 50% more IFOP ports (Infinity Fabric over package) to interconnect with the CCDs, and the mere fact that PCI-Express 5.0 and DDR5 switching fabric and SerDes (serializer/deserializer...