Memory upgrade for Tyan Thunder Motherboard, and all Tyan Motherboard Memory. Find memory for Tyan Thunder K8SR (S) Motherboard. SYSTEM SUMMARY FOR THUNDER K8SR (S). System Name, Thunder K8SR (S). Comments, Chipset: AMD Module must be installed in pairs. Utilizing two AMD Opteron™ processors, the Thunder K8SR (S) is the best choice for 1U/2U rackmount servers. With strategically located components, the.