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What are the 2 types of memory. Explain the acronyms
- ROM- Read Only Memory
- RAM- Random Access Memory
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What are the 3 types of ROM:
- PROM - Programmable Read Only = Firmware
- EPROM - Erasable Programmable Read Only- Can be done with UV Light
- EEPROM- Electrically Erasable Program Read Only-Flash *annoying updates
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What are the 2 types of RAM
- SRAM - static RAM (Cache L1, L2, L3) *Best bec built into CPU
- DRAM- Dynamic RAM
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What are the 2 types of DRAM for laptops
SO DIMM and Micro DIMM
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What are the two types of SIMM
Single Inline Memory Module
- 30 pin - Can be in FPM (fast page mode) or EDO
- or 72 pin - EDO (extended data out mode only)
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What are the 4 DIMM
(*Dual Inline Memory Modules)
- 168-pin - SDRAM
- 184-pin - DDR-SDRAM
- 240-pin DDR2- SDRAM
- 240-Pin DDR3- SDRAM (*New)
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What are the 2 RIMM
Rambus Inline Memory Modules
- 184-pin DDR-SDRAM
- 240-pin DDR2-SDRAM
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Memory access speeds are measured in:
nanoseconds, the lower the nanosec the faster the access
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What are the memory corrections for SIMMs
Parity vs. Non parity
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168 DIMM SDRAM - PC133 Standard
all cycles per clock for SDRAM is 1
Bus width 8 bytes
PC133- 7ns chip type-bus speed 133 -transfer rate 1,066 mbs-133MHz
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168 DIMM SDRAM - PC100 Standard
all cycles per clock for SDRAM is 1
Bus width 8 bytes
PC100-8 ns chip type-bus speed 100- transfer rate 800 mbs-100MHz
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168 Pin DIMM -SDRAM PC66 standard
**Bus Width for all mem cards is 8 bytes
cycles per clock all SDR is 1
PC66- 10 ns chip type-bus speed 66- transfer rate 533 mbs-66MHz
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184 DIMM (DDR-SDRAM) - PC1600 standard
Bus Width for all mem cards is 8 bytes
cycles per clock all DDR is 2
PC1600- DDR200 chip type-100 MHz-200 bus speed -1600 mbs transfer
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184 DIMM (DDR-SDRAM) PC2100 standard
Bus Width for all mem cards is 8 bytes
cycles per clock all DDR is 2
PC2100-DDR266 chip type-133 MHz-266 bus speed -2133 mbs transfer
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184 DIMM (DDR-SDRAM) PC2700 standard
Bus Width for all mem cards is 8 bytes
cycles per clock all DDR is 2
DDR 333 chip type- 166 MHz-333 bus speed and 2,667 MBs transfer
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184 DIMM (DDR-SDRAM) PC3200 standard
Bus Width for all mem cards is 8 bytes
cycles per clock all DDR is 2
DDR400 chip type- 200 MHz-400 bus speed - 3,200 transfer rate
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240 DIMM (DDR-SDRAM) PC2-3200 standard
Bus Width for all mem cards is 8 bytes
cycles per clock all DDR is 2
DDR2-400 chip type- 200 MHz- Bus speed 400- 3200 MBs transfer
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240 DIMM (DDR-SDRAM) PC2-4300 standard
DDR2-533 chip type-266 MHz-533 bus speed-4266 MBs transfer
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240 DIMM (DDR-SDRAM) PC2-5400 standard
DDR2-667 chip type-333 MHz-bus speed 667- 5333 MBs transfer rate
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240 DIMM (DDR-SDRAM) PC2-6400 standard
DDR2- 800 chip type- 400 MHz-bus speed 800- 6400 xfer rate
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240 DIMM (DDR-SDRAM) PC2-8500 standard
DDR2-8500 chip type-533 MHz-bus speed 1066- 8500 MBs xfer rate
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what are the 11 sizes of RAM memory sticks:
- 8MB, 16MB, 32 MB, 64MB, 128 MB, 256 MB, 512 MB, 1GB (= 2 512 MB),
- 2 GB, 4 GB and 8GB
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3 Rules for install of SIMM (30 or 72 pin)
- 1. 45 degree angle push up to lock in place
- 2. must be install equal pairs
- 3. must populate first two slots of SIMM
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5 rules for install of DIMM (168,184, or 240 pin)
- 1. open plastic clips on each side of slot for use
- 2. align the cut-out of the module with engaging pins in slot
- 3. hold upright press down both ends
- 4 if correct seated clips with lock automatically
- 5. can be single pair unless stated dual channel
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6 rules of RIMM install (184 or 232 pin)
- 1. open platic clips on each side
- 2. align the cut out and the module pin connector with slot
- 3. hold upright press down both sides
- 4. if correct clips will lock auto
- 5. must populate all RIMM slots available
- 6. if open slots use dummys- CRIMMs
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240 DIMM DDR3 PC3-6400 standard
DDR3-400 chip type- 400 MHz- 800 bus speed-6400 speed MBs
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240 DIMM DDR3 PC3-8500 standard
DDR3-533 chip type-533 MHz-1066 bus speed-8,500 MBs transfer
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240 DIMM DDR3 PC3-10600 standard
DDR3-667 chip type-667 clock speed-1333 bus speed-10,600 MBs xfer rate
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240 DIMM DDR3 PC3-12800 standard
DDR3-800 chip type-800 MHz- 1600 bus speed-12800 MBs xfer rate
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240 DIMM DDR3 PC3-16000 standard
DDR3-1000 chip type-1000 MHz-2000 bus speed-16000 MBs xfer rate
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