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Overview:
Cycle-time targets were set for the IBM System z9e processor subsystem prior to building the system, and achieving these targets was one of the biggest challenges faced during hardware development. In particular, although the processor-subsystem cycle-time improvement was driven primarily by the technology migration from CMOS 9S (130-nm lithography) for the prior IBM System z990 to CMOS 10S0 (90-nm lithography) for the new system, the cooling capability for the System z9 resulted from a direct migration of the System z990 implementation with very limited improvements. The higher device current leakage and power associated with the technology migration, combined with the fixed cooling capability, created a technology challenge in which the subsystem cycle time and performance were potentially limited by cooling capability.
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| Format: | Size: | 401 KB | |
| Date: | Dec 2006 | ||
| Pages: | 17 |
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