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Tech Tips
Please review the following RMA Tech tips for important information
on any of the following items listed below. Select the item you
purchased to see the recommend solution.
Seventy percent (70%) of all returns are related to these items
and can be resolved with the recommended solution found below.
If you have a problem with any of these items please request an
RMA for exchange/upgrade
with the applicable recommended item, please be sure to note any
price differences.
32M-EDO4K, 32M-4K TECH TIP: 4K refresh modules will only work in later
model Pentium systems, Pentium 166Mhz or later is a good guide.
Most common problem is when installed computer reads only half
the memory, use/replace with item
32M-EDO or
32M to resolve this.
64M-EDO, 64M
TECH TIP: 64MB 4K refresh modules will only work in later
model Pentium class (Pentium 200Mhz+, Pentium Pro) and Pentium
II systems using Intel 430TX or later chipsets. SIS, VIA and other
chipsets that support 256MB of ram can use this memory also. See
our PC chipset guide for details. Your system MUST support
at least 256MB of total RAM to be able to use these modules. If
your ram capacity is 128MB then you cannot install just two of
these to get to 128MB. Intel 430VX systems cannot use this ram.
Most common problem is when installed computer reads only half/quarter
of the memory, use/replace with item
32M-EDO or
32M to resolve this.
64M-PC66
TECH TIP: 64MB PC66 modules will only work in later model
Pentium (Pentium 200Mhz+, Pentium Pro) and Pentium II systems
using Intel 430TX or later chipsets. See our PC chipset guide
for details. They will NOT work with 430VX chipsets which is what
is used in most Pentium 133Mhz ~ 166Mhz systems. Most common problem
when installed is computer reads only half/quarter of the memory,
use/replace with very low density item
32M-PC66 or item 64M-EDO-DIMM.
128M-PC100
TECH TIP: If you have a Pentium II based computer then
you should use item 128M-PC100/16,
a lower density 16 chip module (uses 8x8 DRAM). If you have a
Pentium III Or Celeron 400Mhz or later system ignore this tip.
Some systems require you to have double sided 128MB memory,
in that case use item 128M-PC100/16.
128M-SO100
TECH TIP: If the maximum RAM on your notebook system
is 128MB per slot (or 256MB using 2 DIMMs) using PC100 or PC66
SODIMMs then you MUST use item 128M-SO100/8x16,
a lower bit density more compatible 8 chip module (uses 8x16 DRAM
as opposed to 16x8 DRAM). PC Systems allowing up to 256MB per
slot can use this higher density module, item 128M-SO100. Most
common problem is system does not boot, errors reported, unreliable
memory, use/replace with 128M-SO100/8x16.
The current list of known Toshiba Notebooks that require the use
of item 128M-SO100/8x16
(Kingston Equivalent KTT-SO100/128) are as follows.
256M-PC100/32x4,
256M-PC133/32x4
TECH TIP: These are high density modules made using
32x4 DRAM. Most brand name computers (IBM, Compaq, Dell, HP etc)
do NOT support these modules. Intel chipsets do NOT support these
modules (440BX, 440ZX, 810, 815 etc). See PC Chipset guide for
details. Many motherboard manufacturers do support these modules,
see Matherboard Ram
Guide for a list of motherboards highlighted in yellow that
will support these modules. Most common problem is system sees
only 128MB per module, does not boot, errors reported, unreliable
memory, use/replace with 256M-PC100,
256M-PC133.
256M-AP100, 256M-AP133
TECH TIP: These are high density 8 chip modules made using
either 32x8 or 16x16 type DRAM chips. Typically your computer
must support at least 1GB of total ram in 2 slots to be able to
use these modules. if your system does not support 1GB total
ram or 512MB per slot then please use a lower density 16 chip
module, item 256M-PC100
or 256M-PC133.
Most common problem is system sees only 128MB per module, does
not boot, errors reported, unreliable memory, use/replace with
256M-PC100
or 256M-PC133.
256M-SO100, 256M-SO133, 256M-SO100/32x8, 256M-SO133/32x8 TECH TIP: These are high density 8 chip modules made using
either 32x8 or 16x16 type DRAM chips. Typically your computer
must support at least 1GB of total ram in 2 slots to be able to
use these modules. Exception to this rule is if your system uses the Intel 815E chipset then you can use these modules - max ram on Intel 815E is 512MB but it does support high density ram. If your system does not support 1GB total
ram or 512MB per slot then please use a lower density SODIMM,
item 256M-SO10016C
or 256M-SO13316C.
Most common problem is system sees only 128MB per module, does
not boot, errors reported, unreliable memory, use/replace with
256M-SO10016C
or 256M-SO13316C.
256M-SO10016C
TECH TIP: There are certain Toshiba notebooks that cannot
use these 16 chip low density 256M-SO10016C modules (Kingston
equivalent is KTT-SO100/256) and the alternative is to use the
less expensive 8 chip version, item 256M-SO100
(Kingston equivalent part number KTT-SO815/256). The current
list of known notebooks where item 256M-SO100
MUST be used is as follows.
512M-PC100/64x4,
512M-PC133/64x4
TECH TIP: These are high density modules made using
64x4 DRAM. Most brand name computers (IBM, Compaq, Dell, HP etc)
do NOT support these modules. Intel chipsets do NOT support these
modules (440BX, 440ZX, 810, 815 etc). See PC Chipset guide for
details. Many motherboard manufacturers do support these modules,
see Matherboard Ram
Guide for a list of motherboards highlighted in yellow that
will support these modules. Most common problem is system sees
only 128/256MB per module, does not boot, errors reported, unreliable
memory, use/replace with 512M-PC100,
512M-PC133.
Do not use for Apple Macs
128M-R800,
128M-R800E, 256M-R800, 256M-R800E TECH TIP: These Rambus modules are made using 256Mbit
devices, essential high density chips. Please ensure you are are
using the latest updated BIOS, this solves 99% of all Rambus problems.
See your system or board manufacturer to get the latest BIOS.
Rambus modules also need to be installed in identical pairs or
with a CRIMM (continuity RIMM). Reliable operation requires all
memory slots be filled with ram or CRIMM. In order to use these
higher density modules your system must support at least 512MB
of ram per slot (most systems do, Intel 820 and 850 chipsets support
up to 2GB so these are fine). Most common problem is system will
not boot, ram not recognized.
PC800 Rambus modules are available as -40 and -45. The Intel
820 and 850 chipset support both a 400Mhz and 533Mhz FSB (Front
Side Bus). At 533Mhz you are required to use a -40 Rambus module
or use PC1066.
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