Cyrix M II™ Processor
Frequently Asked Questions
- Q. What is the Cyrix M II™ processor?
- A. The M II™ processor is a high-performance CPU offering advanced processing on Windows® 95 and other operating systems. The M II™ processor features MMX™ instructions, enhanced memory management unit, a 64-KByte internal cache and other state-of-the-art architectural features to achieve higher performance and offer better value than competitive processors.
- Q. How does the M II™ processor compare architecturally to the Pentium® II processor?
- A. The following chart compares the architectural features of the
M II™ and Pentium II processors:
| ARCHITECTURAL FEATURES |
M II™ CPU |
Pentium II CPU |
| MMX Instruction Set |
X |
X |
| Superscalar |
X |
X |
| Superpipelined |
X |
X |
| Register Renaming |
X |
X |
| Data Dependency Removal |
X |
X |
| Multi-Branch Prediction |
X |
X |
| Speculative Execution |
X |
X |
| Out-of-Order Completion |
X |
X |
| 80-Bit FPU |
X |
X |
| Primary Cache (Data + Instruction) |
64K (unified) |
16K + 16K |
- Q. Is the M II™ processor compatible with existing software?
- A. Yes. The M II™ processor is compatible with Windows® 95, Windows NT, Windows, UNIX®, OS/2®, and many other operating systems. It runs thousands of your favorite 16-bit and 32-bit applications as well as the latest MMX-enhanced software.
- Q. What are the performance results for the M II™ processor?
- A. The M II™ processor is competitive with the Pentium II processor. (See the latest Winstone® 98 performance results.) And when compared to the Celeron™ processor, the M II™ processor delivers outstanding performance as well.
- Q.
Is the M II™ CPU a dual-voltage processor?
- A.
Yes. The processor core runs at 2.9V and the processor I/O pins are set for 3.3V.
- Q.
Is the M II™ processor socket 7 compatible?
- A.
Yes. You should be able to use existing socket 7 motherboards that support a P55C pinout. And because of the vast support for socket 7, the M II™ processor is extremely cost effective to implement.
- Q.
What motherboards will support the M II™ CPU?
- A.
Motherboards that are socket 7 compatible and support dual-voltage processors should support the M II™ processor. Check the Motherboard Compatibility List for more information.
- Q. What M II™ processors are currently available?
- A.
The M II-300 processor is now in production. Expect the M II-333 and M II-350 processors soon.
Q. How can I purchase the M II™ processor?
A. Computer manufacturers around the world can buy in volume quantities directly from Cyrix. PC integrators, VARs, dealers, resellers, and retailers can purchase Cyrix processors through an independent Cyrix North American distributor or worldwide distributor. End users can purchase an M II™ processor-based computer from their local retailer or PC reseller.
Q. What if I have more questions?
A. Please contact the Cyrix Processor Support Desk.
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