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Anleitung Zusammenfassung
Can Memory from Third Parties Be Used for Server Applications?
A large number of third-party manufacturers offer inexpensive memory for PCs. This
memory is readily available from a variety of sources, including your local computer
superstore. Most of it is intended for desktop PCs in the home or office, but some vendors
actively promote their memory as being also suitable for servers.
The problem with memory supplied by third-party vendors is that much of it is designed and
manufactured for the less-demanding reliability levels required for desktop PCs. For many
third-party memory vendors, quality and reliability are of secondary importance. Some of
these vendors view DRAMs simply as a commodity and will readily purchase from the chip
manufacturer offering the lowest price. On the other hand, HP and other large OEMs have
experienced that DRAMs are in fact not a commodity and that there are significant
deviations in product quality from one chip manufacturer to another.
Table 1 lists typical problems found with memory as a result of inadequate qualification
testing, poor manufacturing and design techniques, and nonexistent quality control.
Problem
Potential Consequence
Broken or missing decoupling capacitors
DRAM vulnerable to damage from power supply
spikes and surges
DRAMs not adequately grounded; copper traces
Poor DRAM performance due to noise and cross-talk,
poorly placed and routed
resulting in increased possibility of bit errors
DRAMs sensitive to unstable signal from chipset
Single, double, and multi-bit errors
during don’t-care states
Presence detect improperly configured or not
Misinforms the processor of the speed of available
configured at all
memory
Use of incompatible DRAMs
System failure due to timing errors and other
miscellaneous consequences
Improper routing of module board shape resulting in
Electrical short causing burn damage to server at
misaligned connectors
module/memory slot junction
Poor-quality solder joint
Long-term failure after continuous operation in high-
temperature environment
In order to check the viability of alternative memory sources, HP purchased memory
labeled as “suitable” for HP NetServers from five different memory vendors, including
several very prominent third-party brands. After careful evaluation, products from all five of
the memory vendors demonstrated problems found on this list. Although memory products
in our sample were functional in the most basic sense, the affected modules had defects
that could lead to long-term problems after extended operation.
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...Dieses Handbuch ist für folgende Modelle:
PC Desktops - HP NetServer E 40 (27.91 kb)
PC Desktops - HP NetServer E 45 (27.91 kb)
PC Desktops - HP NetServer E 50 (27.91 kb)
PC Desktops - HP NetServer E 55 (27.91 kb)