What's particularly impressive about Telum II isn’t just the cache size or even the architecture—it’s the deliberate trade-off IBM makes for ultra-low latency L

What's particularly impressive about Telum II isn’t just the cache size or even the architecture—it’s the deliberate trade-off IBM makes for ultra-low latency L2, almost as a replacement for traditional L3. That decision makes a lot of sense in a mainframe context where deterministic performance, low tail latency, and tight SLA adherence matter more than broad throughput per watt. It also feels like a return to form: IBM has always optimized for workload-specific performance over general-purpose benchmarks. While x86 designs scale horizontally and are forced to generalize across consumer and datacenter workloads, IBM is still building silicon around enterprise transaction processing. In a way, this lets them explore architectural territory others wouldn’t touch—like banking on huge, fast L2 caches and deferring cross-core coordination to clever interconnect and software layers.