The ASPEED AST2500 is the baseboard management controller (BMC) that provides remote control and monitoring of the system, as well as the VGA port on the rear IO. It has its own storage and uses Samsung DRAM. It also provides a NIC signal, four COM ports, and a lot of other features.
A Realtek RTL8211F is used as the PHY for the BMC's LAN port. We also find two Intel i210AT Gbit LAN controllers on the motherboard.
We find an LSI LSI3008 SAS controller under the heat sink, along with Cypress CY14V101LA 1Mbit nvSRAM, and a 32MB Spansion flash module found on the rear of the motherboard. A Lattice LMX03LF is found, and it's part of Lattice's MachXO3 which supports programmable bridging and IO expansion.
Two 12Gbps 40lane repeaters are found on the motherboard; I assume they repeat the PCI-E signal to the two NVMe ports. We also find many ASMedia ASM1042 (three in total) that provides the internal USB ports and two rear USB 3.0 ports.
Three ICS clock generators are used to provide more clock sources. If I remember correctly a Thread Ripper CPU (so not EPYC) supports up to seven devices without an extra clock source, so it could be these are here to support many more devices.
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- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Packaging and H11SSL-NC Overview]
- Page 3 [TYAN H11SSL-NC Circuit Analysis]
- Page 4 [Supermicro H11SSL-NC Circuit Analysis Continued]
- Page 5 [BIOS]
- Page 6 [Remote Management]
- Page 7 [Test System Setup]
- Page 8 [CPU and Memory Performance Metrics]
- Page 9 [Network and Storage]
- Page 10 [Thermal Imagining and Power]
- Page 11 [What's Hot, What's Not & Final Thoughts]