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686 information |
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The Intel Pentium Pro was introduced in 1995 as the successor to the Pentium. It was the first mainstream CPU to radically change how it executes instructions, by translating them into RISC-like microinstructions and executing these on a highly advanced internal core (the Nexgen Nx586 processor was actually the first x86 CPU to use this design).
The Pentium Pro achieves performance about 50% higher than a Pentium of the same clock speed. It was typically used as a server CPU for Windows NT servers - because of its high 32 bit optimization ist was comparably slow with desktop operating systems.
The architecture of the Cyrix 6x86 incorporating most of the features of the Pentium Pro. Its FPU though is considerably less efficient than Intel's. In general practice (with 16 bit applications) 6x86s were faster than Pentium Pro CPUs. ST and IBM 6x86s are licensed Cyrix 6x86s.
The AMD K6 was built around the original NexGen Nx686 core which was inherited by AMD when it bought NexGen in 1996. This allowed AMD to recover after its problems with its own K5 processor and inital difficulties in the development of its "in house" K6 design. NexGen had developed a powerful RISC processor core which gave the chip impressive sixth generation performance. AMD enhanced this design by the addition of Intel's MMX instructions. The K6 also was optimized for 16 bit code.
For more Information on x86 processors please refer to the x86 processor FAQ.
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| add/correct 686 info |
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202 686 chips in collection: |
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| AMD |
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| K6 |
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AMD-K6/PR2-166ALR |
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AMD-K6-166ALR, Early Version |
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AMD-K6-166ALR |
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AMD-K6-166ALR, Engraved Logo |
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AMD-K6-200ALR, 'K6' Logo |
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AMD-K6-200ALR |
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AMD-K6-200ALYD |
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AMD-K6-233ANR, 'K6' Logo |
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AMD-K6-233ANR |
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AMD-K6/266AFR |
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AMD-K6/300AFR |
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AMD-K6-233ADZ |
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| K6-2 |
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AMD-K6-2/266AFR, Printed Logo |
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AMD-K6-2/266AFR |
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AMD-K6-2/300AFR |
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AMD-K6-2/333AFR-66 |
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AMD-K6-2/350AFR |
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AMD-K6-2/400AFQ |
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AMD-K6-2/400AFR |
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AMD-K6-2/450AHX |
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AMD-K6-2/450AFX |
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AMD-K6-2/500AFX |
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AMD-K6-2/475ACK |
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AMD-K6-2/300AMZ |
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AMD-K6-2/350AMZ |
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| K6-2+ |
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AMD-K6-2+/500ACZ |
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| K6-III |
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AMD-K6-III/350AFK |
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AMD-K6-III/400AHX |
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AMD-K6-III/450AHX |
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| Athlon |
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Athlon K7500MTR51B C |
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Athlon K7550MTR51B C |
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Athlon K7650MTR51B C |
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Athlon K7600MTR51B A |
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Athlon K7700MTR51B A |
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Athlon K7750MTR52B A |
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Athlon K7800MPR52B A |
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Athlon K7850MPR52B A |
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Athlon A0700MPR24B A |
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Athlon A0700APT3B |
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Athlon A0850AMT3B |
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Athlon A0900AMT3B |
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Athlon A1000AMT3B |
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Athlon A1100AMS3B |
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Athlon A1200AMS3C |
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Athlon A1300AMS3B |
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Athlon A1333AMS3C |
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Athlon A1400AMS3C |
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Athlon XP 1500+ AX1500DMT3C |
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Athlon XP 1600+ AX1600DMT3C |
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Athlon XP 1800+ AX1800DMT3C |
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| Duron |
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Duron D600AUT1B |
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Duron D650AUT1B |
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Duron D700AUT1B |
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Duron D750AUT1B |
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Duron D800AUT1B |
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Duron D850AUT1B |
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Duron D900AUT1B |
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Duron DHD1000AMT1B |
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Duron DHD1100AMT1B |
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Duron DHD1300AMT1B |
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| Cyrix |
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| 6x86 |
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6x86-P150+GP |
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6x86-P150+GP, no Voltage Markings |
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6x86-P150+GP w/ Capacitors |
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6x86-P166+GP 3.53V |
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6x86-P166+GP |
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6x86-PR166+GP |
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6x86L-P150+GP |
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6x86L-PR166+GP |
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6x86L-PR200+GP |
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6x86L-PR200+GP, Variant |
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| 6x86MX |
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6x86MX-PR166 |
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6x86MX-PR200, 75 MHz Bus |
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6x86MX-PR200, 66 MHz Bus |
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6x86MX-PR233 |
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| M II |
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M II-233GP, 66 MHz Bus, Dark |
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M II-266GP, 66 MHz Bus |
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M II-300GP, 66 MHz Bus |
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M II-300GP, 66 MHz Bus, Dark |
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M II-300GP, 75 MHz Bus |
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M II-333GP, 66 MHz Bus, Silver |
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M II-333GP, 75 MHz Bus |
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M II-333GP, 83 MHz Bus, Engineering Sample |
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M II-366GP, 100 MHz Bus |
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M II-400GP, 95 MHz Bus |
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| MediaGX |
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Gx86 GX-133BP |
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MediaGX GX-120BP |
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MediaGX GX-133BP |
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MediaGX GX-150BP |
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MediaGX GXI-166BP |
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MediaGX GXI-180BP |
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MediaGX GXI-180BP (silver) |
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MediaGX GXm-233BP |
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MediaGX GXm-266BP |
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MediaGX GXm-180GP |
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MediaGX GXm-200GP |
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MediaGX GXm-200GP 85C |
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MediaGX GXm-233GP |
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MediaGX GXm-266GP |
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| IBM |
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| 6x86 |
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6x86 w/o P-Rating |
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6x86 P120+ |
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6x86 P150+ |
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6x86 P166+ |
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6x86 P166+, 3.5V |
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6x86 P200+ |
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6x86L P150+ |
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6x86L PR166+ |
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6x86L PR200+ |
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| 6x86MX |
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6x86MX PR166, 66 MHz Bus |
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6x86MX PR200, 66 MHz Bus |
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6x86MX PR233, 75 MHz Bus |
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6x86MX PR300, 75 MHz Bus |
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6x86MX PR300, 66 MHz Bus, black |
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| Intel |
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| Pentium Pro |
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Pentium Pro KB80521EX150, 150 MHz, 256 KB Cache |
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Pentium Pro KB80521EX166, 166 MHz, 512 KB Cache |
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Pentium Pro KB80521EX180, 180 MHz, 256 KB Cache |
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Pentium Pro KB80521EX200, 200 MHz, 256 KB Cache |
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Pentium Pro KB80521EX200, 200 MHz, 512 KB Cache |
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Pentium Pro GJ80521EX200, 200 MHz, 1MB Cache |
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| Pentium II |
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Pentium II 80522PX233512, 233 MHz |
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Pentium II 80522PX266512, 266 MHz |
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Pentium II 80522PX300512EC, 300 MHz |
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Pentium II 80523PX333512, 333 MHz |
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Pentium II 80523PY350512PE, 350 MHz |
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Pentium II 400/512/100/2.0V, 400 MHz |
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Pentium II 233 MHz MMC-1 |
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Pentium II 266 MHz Mini-Cartridge, 512 KB cache |
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Pentium II 300 MHz Mini-Cartridge, 512 KB cache |
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Pentium II 266 MHz MMC-2, 512 KB cache on module |
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Pentium II 300 MHz MMC-2, 512 KB cache on module |
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Pentium II 300 MHz MMC-2, 256 KB on-die cache |
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Pentium II 333 MHz MMC-2, 256 KB on-die cache |
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Pentium II 400 MHz MMC-2, 256 KB on-die cache |
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Mobile Pentium II KP 400/256 |
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| P II Celeron |
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Celeron 266 MHz, Engineering Sample |
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Celeron 266 MHz |
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Celeron 300 MHz |
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Celeron 333 MHz |
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Celeron 366 MHz |
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Celeron FV524RX366 |
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Celeron FV524RX400 |
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Celeron FV524RX433 |
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Celeron FV524RX466 |
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Celeron FV524RX500 |
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Celeron FV524RX533 |
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Celeron 400 MHz MMC-2, 128 KB on-die cache |
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Mobile Celeron KP 400/128 |
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| P II Xeon |
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Pentium II Xeon 400 MHz / 512 KB |
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Pentium II Xeon 400 MHz / 1MB |
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Pentium II Xeon 450 MHz / 1MB |
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| Pentium III |
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Pentium III A80525 450 MHz |
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Pentium III A80525 500 MHz |
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Pentium III A80525 550 MHz |
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Pentium III 550 - RB80526PY550256 |
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Pentium III 600E/256/100/1.65V |
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Pentium III 650/256/100/1.65V |
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Pentium III 667/256/133/1.65V |
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Pentium III 667 - RB80526PZ667256 |
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Pentium III 700/256/100/1.65V |
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Pentium III 700 - RB80526PY700256 |
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Pentium III 733/256/133/1.7V |
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Pentium III KC 733/128 (Xbox CPU) |
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Pentium III 800/256/100/1.65V |
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Pentium III 800/256/133/1.7V |
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Pentium III 866/256/133/1.7V |
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Pentium III 900/256/100/1.7V |
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Pentium III 1100/256/100/1.75V |
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Pentium III-S 1133/512/133/1.45V |
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Mobile Pentium III KP 650/256 |
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Mobile Pentium III KP 800/256 |
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| P III Celeron |
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Celeron 600/128/66/1.7V |
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Celeron 633/128/66/1.7V |
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Celeron 700/128/66/1.7V |
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Celeron 733/128/66/1.75V |
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Celeron 950/128/100/1.75V |
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Celeron 1000A/256/100/1.475 |
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Celeron 1100/128/100/1.75V |
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Mobile Celeron KP 600/128 |
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Mobile Celeron KP 650/128 |
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| P III Xeon |
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Pentium III Xeon 80525KY500512, Engineering Sample |
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Pentium III Xeon 550/100/512 |
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Pentium III Xeon 80525KY5001M, Engineering Sample |
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Pentium III Xeon 600/133/256 |
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Pentium III Xeon 667/133/256 |
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Pentium III Xeon 80526KZ800256, Engineering Sample |
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| P II OverDrive |
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Pentium II OverDrive PODP66X333 |
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| SGS-Thomson |
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| 6x86 |
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ST6x86-P120+ |
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ST6x86-P150+ |
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ST6x86-P166+ |
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ST6x86-P166+ w/o Cyrix Logo |
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| VIA |
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| Cyrix III/C3 |
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Cyrix III-466 MHz |
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Cyrix III-500 MHz |
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Cyrix III-533 MHz |
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Cyrix III-550 MHz |
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Cyrix III-600 MHz |
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Cyrix III-667 MHz |
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Cyrix III-700 MHz |
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Cyrix III-750A MHz, Engineering Sample |
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C3-733 MHz |
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C3-750A MHz, Engineering Sample |
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C3 800 MHz |
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C3-800 MHz (PGA) |
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C3-866 MHz (PGA) |
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