Dell Precision T3500 BCC memory

Mark_R,

Memory

Below are the memory specs and memory configurations as well as other memory information for the T3500.

Memory

Memory

The Precision T3500 uses 1066 MHz and 1333Mhz DDR3 unbuffered SDRAM memory. DDR3 SDRAM or double-data-rate three synchronous dynamic random access memory is a random access memory technology. It is a part of the SDRAM family of technologies, which is one of many DRAM (dynamic random access memory) implementations, and is an evolutionary improvement over its predecessor, DDR2 SDRAM.

Its primary benefit is the ability to run its I/O bus at four times the speed of the memory cells it contains, thus enabling faster bus speeds and higher peak throughputs than earlier technologies. This is achieved at the cost of higher latency. Also, the DDR3 standard allows for chip capacities of 512 megabit to 8 gigabit, effectively enabling memory modules of maximum 16 gigabyte in size.

DDR3 memory comes with a promise of a power consumption reduction of 30% compared to current commercial DDR2 modules due to DDR3's 1.5 V supply voltage, compared to DDR2's 1.8 V or DDR's 2.5 V. This supply voltage works well with the 90 nm fabrication technology used for most DDR3 chips. Some manufacturers further propose to use "dual-gate" transistors to reduce leakage of current.

The main benefit of DDR3 comes from the higher bandwidth made possible by DDR3's 8 bit deep prefetch buffer, whereas DDR2's is 4 bits, and DDR's is 2 bits deep.

Memory Modules

Supported Memory Configurations

Size (GB)	DIMM Ranks	DIMM1	DIMM2	DIMM3	DIMM4	DIMM5	DIMM6	1333MHz	1066MHz	Channel Mode
1	SR	1 GB								Single
2	SR	1 GB	1 GB							Dual
3	SR	1 GB	1 GB	1 GB						Tri
4	SR	1 GB	1 GB	1 GB	1 GB					Tri
4	DR	2 GB	2 GB							Dual
6	SR	1 GB	1 GB	1 GB	1 GB	1 GB	1 GB			Tri
6	DR	2 GB	2 GB	2 GB						Tri
12	DR	2 GB	2 GB	2 GB	2 GB	2 GB	2 GB			Tri
12	DR	4 GB	4 GB	4 GB						Tri
24	DR	4 GB	4 GB	4 GB	4 GB	4 GB	4 GB			Tri

NOTE: DDR3 DIMMs have 240 pins, the same number as DDR2, and are the same size, but are electrically incompatible and have a different key notch location.

Features

DDR3 SDRAM Components:

• Introduction of asynchronous RESET pin
• Support of system level flight time compensation
• On-DIMM Mirror friendly DRAM pin out
• Introduction of CWL (CAS Write Latency) per speed bin
• On-die IO calibration engine
• READ and WRITE calibration

DDR3 Modules:

• Fly-by command/address/control bus with On-DIMM termination
• High precision calibration resistors

Advantages compared to DDR2

• Higher bandwidth performance increase (up to effective 1600 MHz)
• Performance increase at low power (longer battery life in laptops)
• Enhanced low power features
• Improved thermal design (cooler)

Disadvantages compared to DDR2

• Commonly higher CAS Latency
• Slightly higher costs than equivalent DDR2 memory for now