Cyrix 6x86MX
| Cyrix 6x86MX | |
|---|---|
 6x86MX PR200 |
|
| Production: | May 30, 1997 to 1999? |
| Producer: | Cyrix , IBM and ST Microelectronics |
| Processor clock: | 133 MHz to 250 MHz |
| FSB cycle: | 55 MHz to 83 MHz |
| L1 cache size: | 64 KiB |
| Instruction set : | x86 |
| Base: | Base 7 |
| Name of the processor core: | M2 |
The Cyrix 6x86MX was a microprocessor from the Cyrix company released in 1997 and is the successor to the Cyrix 6x86 .
Technical
The 6x86MX can be seen as a reaction to the Intel Pentium MMX with Intel's MMX command extension. These MMX commands were also integrated in the Intel Pentium II and AMD K6 . Cyrix was thus under some pressure to act and developed the full MMX-compatible multimedia extension EMMI (stands for E nhanced M ulti M edia I nstructions ), which was integrated into the Cyrix 6x86MX.
This CPU was brought onto the market on May 30, 1997 and is largely based on the older Cyrix 6x86 , but was equipped with a much larger L1 cache (64 instead of 16 KiB ), an improved branch prediction and of course the aforementioned EMMI technology. In addition, the 6x86MX has been given additional functions of the Pentium Pro . DualVoltage was also supported from the start.
All in all, the 6x86MX was a pretty good CPU, which could boast thanks to the improvements in the integer area and again achieved a higher performance than the competing products with the same clock frequency . For this reason, a P rating was used again. Another change compared to the 6x86 was the use of significantly more flexible multipliers: x2.5 became possible and thus allowed a much larger range of clock frequencies.
Later Cyrix variants (with a CPU speed from 225 MHz and a P rating from 300) were sold under the name MII , while IBM kept the name 6x86MX.
Model data
- Code name: M2
- Sold as: Cyrix 6x86MX, IBM 6x86MX
- L1 cache: 64 KiB (unified)
- L2 cache: depending on the motherboard or chipset used
- MMX
- Socket 7 with a front side bus from 55 to 83 MHz
- Operating voltage (VCore): 2.9V
- Release DATE: May 1997
- Manufacturing technology: 0.35 µm at IBM and ST Microelectronics
- The size: 197, 156, 119 or 65 mm² with 6.5 million transistors
- Clock rates: 133 MHz to 250 MHz
- PR166 +: 133 MHz (66 MHz FSB)
- PR166 +: 137.5 MHz (55 MHz FSB)
- PR166 +: 150 MHz (50 or 60 MHz FSB)
- PR200 +: 150 MHz (75 MHz FSB)
- PR200 +: 165 MHz (55 MHz FSB)
- PR200 +: 166 MHz (66 MHz FSB)
- PR200 +: 180 MHz (60 MHz FSB)
- PR233 +: 166 MHz (83 MHz FSB)
- PR233 +: 187.5 MHz (75 MHz FSB)
- PR233 +: 200 MHz (66 MHz FSB)
- PR266 +: 207.5 MHz (83 MHz FSB)
- PR266 +: 225 MHz (75 MHz FSB)
- PR266 +: 233 MHz (66 MHz FSB)
- PR300 + (only from IBM): 225 MHz (75 MHz FSB)
- PR300 + (only from IBM): 233 MHz (66 MHz FSB)
- PR333 + (only from IBM): 250 MHz (83 MHz FSB)
