Shared Flashcard Set

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RAM
Memory Modules and their Characteristics
24
Computer Science
Not Applicable
07/20/2010

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Cards

Term
SO-DIMM
Definition
"Small Outline" Dual Inline Memory Module
Used By Laptops
Term
SIMMs Measure their speed in these units
Definition
Nanoseconds.
Term
Common SIMM speeds
Definition
60, 70, or 80 nanoseconds access time.
Term
Access Time
Definition
Smaller is Better
Term
SIMM
Definition
Single Inline Memory Module
Term
When Windows runs out of memory it gives this error or slows to a "painful" crawl.
Definition
"Insufficient Memory"
Term
Upgrade Memory
Definition
add more RAM
Term
How Many pins does a DDR3 DIMM have? (Same # as DDR2)
Definition
240 Pins
Term
How Many Pins Does a DDR2 DIMM have? (Same # as DDR3)
Definition
240 Pins
Term
How Many pins are on a DDR DIMM?
Definition
184 Pins
Term
How Many pins does a SDRAM DIMM have? How Many "offset notches" does it have?
Definition
168 Pins 2 offset notches
Term
How Many Pins Does a RIMM have? How many Offset Notches?
Definition
184 Pins and 2 offset notches.
Term
How Many pins do SIMMs have (Both Varieties)?
Definition
72 Pins, and 30 pins.
Term
How Many 30-Pin SIMMs must be installed in a memory bank?
Definition
4 SIMMs of THIS type must be installed.
Term
How many 72-pin SIMMs must be installed in a memory bank?
Definition
2 SIMMs of this type must be installed.
Term
How many offset notches do DDR3, DDR2, DDR have?
Definition
These DIMMs have 1 offset notch though its position varies on each variety.
Term
Edge Connectors (and the slots they connect to) are made of either of these metals.
Definition
Tin or Gold, don't let them touch or corrosion occurs.
Term
What advantage does SDRAM have over SIMMs?
Definition
IT was synchronized with the system clock which allowed for faster memory access than a SIMM.
Term
What Advantage did DDR RAM have over SDRAM?
Definition
IT was able to perform two memory accesses per system clock cycle compared to SDRAM.
Term
DDR3 Uses less voltage than this earlier generation technology.
Definition
DDR2 uses more voltage than this later generation technology.
Term
A DIMM is advertised as "64Meg x72," how much memory does this unit hold? What does x72 mean?
Definition
This unit would hold 576MB. x72 represents the data path of 72 bits.
Term
If memory is advertised as "64Meg x72," what is the formula for how much memory this holds in megabytes?
Definition
(Meg x datapath)/8 [number of bits in a byte] is the formula for this.
Term
DIMM has memory on both sides it is...
Definition
This unit would be called "double sided"
Term
This Type of DIMM supports triple channeling.
Definition
DDR3 supports this type of channeling.
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