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zSeries 900 (z900) - IBM
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zSeries 900
Developer IBM
Manufacturer IBM
Type Microprocessors
Introduction October 3, 2000 (announced)
December 18, 2000 (launch)
ISA z/Architecture
µarch z900
Word size 64 bit
8 octets
16 nibbles
Process 0.18 μm
180 nm
1.8e-4 mm
Technology CMOS
Clock 769 MHz-917.4 MHz
ESA/390 z990

zSeries 900 (z900) was a family of 64-bit z/Architecture multi-core microprocessor multi-chip modules introduced by IBM in late 2000. Those processors are found in the IBM zSeries 900 2064 mainframe servers.


Based on IBM's new z900 microarchitecture and implementing the new z/Architecture ISA, the new processors replaced the aging ESA/390 systems.

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designerIBM +
first announcedOctober 3, 2000 +
first launchedDecember 18, 2000 +
full page nameibm/z900 +
instance ofmicroprocessor family +
instruction set architecturez/Architecture +
main designerIBM +
manufacturerIBM +
microarchitecturez900 +
namezSeries 900 +
process180 nm (0.18 μm, 1.8e-4 mm) +
technologyCMOS +
word size64 bit (8 octets, 16 nibbles) +