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- 24.11.2002
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Hallo ...
... kann mir jemand Aukunft über das Timing von DDR400 (PC3200) geben?
... was genau bedeuten Angaben wie: CL2-2-2-6-1T?
... welches Timing verbaut Apple im G5?
folgende Infos habe ich bis jetzt gefunden (bei Apple):
RAM Expansion
-unbuffered DDR400 (PC3200) dual in-line memory modules (DIMMs)
-Each DIMM can contain 128 MB, 256MB, 512 MB and1 GB (future expansion ability of 2 GB) of double data rate synchronous dynamic RAM (DDR SDRAM)
-At least one pair of the RAM expansion slots contains factory installed DIMMs
-Additional DIMMs must be installed in pairs of the same size. The slot pairs are numbered: J11 and J12, J13 and J14, J41 and J42, and J43 and J44
-When installing additional memory, populate starting with the lowest slot pair numbers
-For all microprocessor speeds and for DDR400 (PC3200) SDRAM DIMMs, the Power Mac G5 supports CAS latencies of 2, 2.5, 3, 4 and 5
DIMM Specifications
-The RAM expansion slots accept 184-pin DDR SDRAM DIMMs that are 2.5 volt, unbuffered, 8-byte, nonparity, and DDR400-compliant (PC3200)
Important
-DIMMs with any of the following features are not supported in the Power Mac G5 computer: registers or buffers, PLLs, ECC, parity, or EDO RAM
Mechanical Specifications
-The mechanical design of the DDR SDRAM DIMM is defined by the JEDEC specification JESD21-C, MODULES4_20_4, Release 11b
-The maximum height of DIMMs for use in the Power Mac G5 computer is 2 inches
Electrical Specifications
-The electrical design of the SDRAM DIMM is defined by the JEDEC specification JESD21-C, MODULES4_20_4, Release 11b
-The Serial Presence Detect (SPD) EEPROM specified in the JEDEC standard is required and must be set to properly define the DIMM configuration. The EEPROM is powered on 3.3 V
Important
-For a DIMM to be recognized by the startup software, the SPD feature must be programmed properly to indicate the timing modes supported by the DIMM.
Important
-Power is delivered to the Power Mac G5 during sleep mode, so do not remove DIMMs while in sleep mode. A red light adjacent to the DIMM is illuminated when power is present.
Vielen Dank schon mal
Gruß: minusman
... kann mir jemand Aukunft über das Timing von DDR400 (PC3200) geben?
... was genau bedeuten Angaben wie: CL2-2-2-6-1T?
... welches Timing verbaut Apple im G5?
folgende Infos habe ich bis jetzt gefunden (bei Apple):
RAM Expansion
-unbuffered DDR400 (PC3200) dual in-line memory modules (DIMMs)
-Each DIMM can contain 128 MB, 256MB, 512 MB and1 GB (future expansion ability of 2 GB) of double data rate synchronous dynamic RAM (DDR SDRAM)
-At least one pair of the RAM expansion slots contains factory installed DIMMs
-Additional DIMMs must be installed in pairs of the same size. The slot pairs are numbered: J11 and J12, J13 and J14, J41 and J42, and J43 and J44
-When installing additional memory, populate starting with the lowest slot pair numbers
-For all microprocessor speeds and for DDR400 (PC3200) SDRAM DIMMs, the Power Mac G5 supports CAS latencies of 2, 2.5, 3, 4 and 5
DIMM Specifications
-The RAM expansion slots accept 184-pin DDR SDRAM DIMMs that are 2.5 volt, unbuffered, 8-byte, nonparity, and DDR400-compliant (PC3200)
Important
-DIMMs with any of the following features are not supported in the Power Mac G5 computer: registers or buffers, PLLs, ECC, parity, or EDO RAM
Mechanical Specifications
-The mechanical design of the DDR SDRAM DIMM is defined by the JEDEC specification JESD21-C, MODULES4_20_4, Release 11b
-The maximum height of DIMMs for use in the Power Mac G5 computer is 2 inches
Electrical Specifications
-The electrical design of the SDRAM DIMM is defined by the JEDEC specification JESD21-C, MODULES4_20_4, Release 11b
-The Serial Presence Detect (SPD) EEPROM specified in the JEDEC standard is required and must be set to properly define the DIMM configuration. The EEPROM is powered on 3.3 V
Important
-For a DIMM to be recognized by the startup software, the SPD feature must be programmed properly to indicate the timing modes supported by the DIMM.
Important
-Power is delivered to the Power Mac G5 during sleep mode, so do not remove DIMMs while in sleep mode. A red light adjacent to the DIMM is illuminated when power is present.
Vielen Dank schon mal
Gruß: minusman
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