IBM z14 (microprocessor)
| Produced | 2017 |
|---|---|
| Designed by | IBM |
| Common manufacturer(s) | |
| Max. CPU clock rate | 5.2 GHz |
| Min. feature size | 14 nm |
| Instruction set | z/Architecture |
| Cores | 10 |
| L1 cache | 128 KB I-L1 128 KB D-L1 per core |
| L2 cache | 2 MB I-L2 4 MB D-L2 per core |
| L3 cache | 128 MB shared |
| Predecessor | z13 |
The z14 is a microprocessor made by IBM for their IBM Z mainframe computers, announced on July 17, 2017. Manufactured at GlobalFoundries' East Fishkill, New York fabrication plant. IBM stated that it is the world's fastest microprocessor by clockspeed at 5.2 GHz., with a 10% increased performance per core and 30% for the whole chip compared to its predecessor the z13.
The Processor Unit chip (PU chip) has an area of 696 mm2 (26.5 × 27.8 mm) and consists of 6.1 billion transistors. It is fabricated using GlobalFoundries' 14 nm FinFET silicon on insulator fabrication process, using 17 layers of metal and supporting speeds of 5.2 GHz, which is more than its predecessor, the z13. The PU chip can has 10 cores bus can have 7-10 cores (or "processor units" in IBM's parlance) enabled depending on configuration. The z14 cores supports two-way simultaneous multithreading for more applications than previously.
The PU chip is packaged in a single-chip module, whih is the same as its predecessor, but a departure of previous designs which were mounted on large multi-chip modules. A computer drawer consists of six PU chips and one Storage Controller (SC) chip containing the L4 cache.
The cores implement the CISC z/Architecture with a superscalar, out-of-order pipeline. New in z14 is a cryptographic coprocessor, called CPACF, attached to each core, used for random number generation, hashing, encryption and decrypting and compression. Further enhancements include an optimization of the core's pipeline, doubling the on-chip caches, better branch prediction, a new decimal arithmetic SIMD engine designed to boost COBOL and PL/I code, a "guarded storage facility" that helps Java applications during garbage collection, as well as other enhancements increses the cores performance compared to the predecessors.
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