Cyrix MII

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Cyrix MII
KL Cyrix MII-333.jpg
Cyrix MII-333
Production: 1998 to 2000
Producers:
Processor clock: 225 MHz to 300 MHz
FSB cycle: 66 MHz to 100 MHz
L1 cache size: 64 KiB
Instruction set : x86
Microarchitecture : CISC
Base: Base 7
Name of the processor core: M2

The Cyrix MII was a microprocessor from the Cyrix company and is nothing more than a renamed Cyrix 6x86MX .

Cyrix presented this CPU on April 15, 1998 after the takeover by National Semiconductor and thus disappointed the professional world: Instead of a revised processor design, only a renamed Cyrix 6x86MX was presented. The models MII-300 and MII-333 with their relatively low clock rates could not hold their own against the competition in the form of the AMD K6-2 and the Intel Pentium II and the sales figures plummeted accordingly. IBM did not follow this name change and continued to sell the MII-300 and -333 as the 6x86MX-PR300 and 6x86MX-PR333.

After VIA Technologies ( Taiwan ) took over Cyrix in mid-1999 , the first step was to hand over the production of MII CPUs to TSMC . Thanks to The - Shrinks to 0.18 microns could the clock speeds are slightly raised, so that you can still MII 366, MII-400 and MII-433 brought to market. All in all, however, the MII sealed the downfall of the Cyrix company.

Model data

  • Code name: M2
  • Sold as: Cyrix MII, IBM 6x86MX (6x86MX-PR300 and -PR333 only)
  • L1 cache: 64 KiB (unified)
  • MMX
  • Socket 7 with a front side bus from 66 to 100 MHz
  • Operating voltage (VCore): 2.9V (2.0V and 2.2V at 0.18 µm)
  • Release DATE: April 1998
  • Manufacturing technology: 0.25 µm at IBM and National Semiconductor , later at TSMC (0.18 µm)
  • The size: 197, 156, 119 or 65 mm² with 6.5 million transistors
  • Clock rates: 225 MHz to 300 MHz
    • 300: 225 MHz ( 075 MHz FSB)
    • 300: 233 MHz ( 066 MHz FSB)
    • 333: 250 MHz ( 083 MHz FSB)
    • 333: 263 MHz ( 075 MHz FSB)
    • 366: 250 MHz (100 MHz FSB)
    • 400: 285 MHz ( 095 MHz FSB)
    • 433: 300 MHz (100 MHz FSB)

Web links

Commons : Cyrix MII  - collection of images, videos and audio files