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Cyrix identification

4x86 | 5x86 | 6x86 | MII | Geode GX1 | Geode GXLV | Media GX

4x86 identification

Related links: 80486

	¹	²	³		⁴	⁵	⁶	⁷
Cx	486	DX	2	-	V	66	G	P

									7. Temperature range
									P	Commercial 0 - 70°C

									6. Package type
									G	Ceramic PGA
									Q	Plastic Quad Flat Pak

									5. Frequency
									33	33 MHz
									40	40 MHz
									50	50 MHz
									66	66 MHz
									80	80 MHz

									4. Operating voltage
									Blank	5 V
									V	3.3V

									3. Clock multiplier
									Blank	Processor runs at the bus frequency
									2	Processor runs at 2x the bus frequency
									4	Processor runs at 3x the bus frequency

									2. Processor features
									DX	Version with integrated co-processor

									1. Part number
									486	80486 processor

5x86 identification

Related links: 5x86

¹		²	³	⁴
5x86	-	120	G	P

					4. Temperature range
					P	Commercial 0 - 70°C

					3. Package type
					G	Ceramic PGA
					Q	Plastic Quad Flat Pak

					2. Frequency
					100	100 MHz
					120	120 MHz
					133	133 MHz

					1. Part number
					5x86	5x86 family

6x86 identification

Related links: 6x86 | 6x86L | 6x86MX

¹		²		³	⁴
6x86	-	PR200	+	G	P

						4. Temperature range
						P	Commercial 0 - 70°C

						3. Package type
						G	Ceramic PGA

						2. Frequency rating
						P133	133 MHz (rated), 110 MHz (actual)
						P150	150 MHz (rated), 120 MHz (actual)
						PR150	150 MHz (rated)
						P166	166 MHz (rated), 133 MHz (actual)
						PR166	166 MHz (rated) 150 MHz (actual, 60 MHz FSB) 133 MHz (actual, 66 MHz FSB)
						PR200	200 MHz (rated) 166 MHz (actual, 66 MHz FSB) 150 MHz (actual, 75 MHz FSB)
						PR233	233 MHz (rated), 188 MHz (actual, 75 MHz FSB)
						PR266	266 MHz (rated), 208 MHz (actual, 83 MHz FSB)

						1. Part number
						6x86	6x86 processor
						6x86L	Low power version of 6x86 processor
						6x86MX	6x86 processor with MMX instruction set

MII identification

Part number, printed on the front of the CPU, provides basic information about the CPU like the rated speed and package type. Please see the table below for more information on how to decode the part number.

The part number does not provide all necessary information for processor installation, you will need more data from the CPU. Bus frequency, clock multiplier and voltage are required to set the motherboard correctly for the processor. Non-rated processor speed can be calculated as "bus frequency" x "clock multiplier".

Engineering sample letters are only present on the engineering samples of the processor. Production versions of the chip don't have "ES" letters.

Cyrix MII identification

Related links: MII

¹		²	³	⁴
MII	-	300	G	P

					4. Temperature range
					P	Commercial 0 - 70°C

					3. Package type
					G	Ceramic PGA

					2. Frequency
					200	200 MHz (rated), 166 MHz (actual, 66 MHz FSB)
					233	233 MHz (rated) 200 MHz (actual, 66 MHz FSB) 187.5 MHz (actual, 75 MHz FSB)
					266	266 MHz (rated) 200 MHz (actual, 66 MHz FSB) 207 MHz (actual, 83 MHz FSB)
					300	300 MHz (rated) 233 MHz (actual, 66 MHz FSB) 225 MHz (actual, 75 MHz FSB)
					333	333 MHz (rated) 266 MHz (actual, 66 MHz FSB) 262 MHz (actual, 75 MHz FSB) 250 MHz (actual, 83 MHz FSB)
					350	350 MHz (rated) 250 MHz (actual, 83 MHz FSB) 270 MHz (actual, 90 MHz FSB)
					366	366 MHz (rated), 250 MHz (actual, 100 MHz FSB)
					400	400 MHz (rated), 285 MHz (actual, 95 MHz FSB)
					433	433 MHz (rated), 300 MHz (actual, 100 MHz FSB)

					1. Microprocessor family
					MII	M II processor

Geode GX1 identification

Related links: GX1

¹		²	³		⁴
GX1	-	300	B	-	2.0

						4. Operating voltage
						1.6	1.6V
						1.8	1.8V
						2.0	2.0V

						3. Package type
						B	BGA
						P	Staggered Ceramic PGA

						2. Frequency
						200	200 MHz
						233	233 MHz
						266	266 MHz
						300	300 MHz

						1. Microprocessor family
						GX1	GX1 processor

Geode GXLV identification

¹		²	³		⁴		⁵
GXLV	-	266	B		2.9		85C

								5. Operating temperature
								70C	70 °C
								85C	85 °C

								4. Operating voltage
								2.2	2.2V
								2.5	2.5V
								2.9	2.9V

								3. Package type
								B	BGA
								P	Staggered Ceramic PGA

								2. Frequency
								166	166 MHz
								200	200 MHz
								233	233 MHz
								266	266 MHz

								1. Microprocessor family
								GX1	GX1 processor

Media GX identification

To identify Cyrix Media GX processor use the part number printed on the chip. The part number contains such information as processor speed, package type, core voltage and maximum case temperature. See the table below for interpretation of that number.

Cyrix GXm identification

Related links: MediaGX

¹		²		³		⁴		⁵
GXm	-	200	G	B		2.9V		85C

									5. Operating temperature
									Blank	70 °C
									60C	60 °C
									80C	80 °C
									85C	85 °C

									4. Operating voltage
									2.2V	2.2V
									2.9V	2.9V

									3. Package type
									B	BGA
									P	Staggered Ceramic PGA

									2. Frequency
									180	180 MHz
									200	200 MHz
									233	233 MHz
									266	266 MHz
									300	300 MHz

									1. Microprocessor family
									GXm	MediaGX processor

Last modified: 2 Jul 2012


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