Memory: Dell Dimension XPS Rxxx Systems
Memory: Dell™ Dimension™ XPS Rxxx Systems
Memory Installation
| Installing/Removing
Memory | System Memory Map |
DIMM Sticker
The 3 DIMM
sockets can accommodate from 64 to 384
MB of RAM.
Supported DIMM sizes are as follows:
- 32 MB (non-ECC)
- 64 MB (non-ECC)
- 128 MB (non-ECC)
- 64 MB (ECC)
- 128 MB (ECC)
 |
NOTE: You can mix DIMM
sizes and install them in any order in the memory banks,
leaving a bank unoccupied if necessary. It is recommended
that you fill the sockets in order starting with Bank 0,
but it is not a requirement. |
Only 100-MHz DIMMs are supported. The system
can include both ECC and non-ECC memory; however, to support ECC,
all installed DIMMs must be ECC-capable. ECC DIMMs have
9 memory chips on the module and non-ECC DIMMs have 8 chips.
See Removing/Installing DIMMs.
| Memory Range |
Address Range |
Size |
Description |
| 1024-384000 KB |
00100000-18000000h |
383 MB |
Extended memory |
| 960-1023 KB |
F0000-FFFFFh |
64 KB |
System BIOS |
| 944-959 KB |
EC000-EFFFFh |
16 KB |
System BIOS (available as UMB) |
| 936-943 KB |
EA000-EBFFFh |
8 KB |
Plug and Play configuration area |
| 928-935 KB |
E8000-E9FFFh |
8 KB |
System BIOS (available as UMB) |
| 896-927 KB |
E0000-E7FFFh |
32 KB |
Reserved for BIOS |
| 800-895 KB |
C8000-DFFFFh |
96 KB |
Available high memory |
| 640-799 KB |
A0000-C7FFFh |
160 KB |
Video memory and BIOS |
| 638-640 KB |
9FC00-9FFFFh |
2 KB |
Extended BIOS data |
| 512-638 KB |
80000-9FBFFh |
127 KB |
Extended conventional memory |
| 0-511 KB |
00000-7FFFFh |
512 KB |
Conventional memory |
Every 100-MHz DIMM has a sticker that identifies the
manufacturer and provides specifications in the following format:
x = Frequency (MHz)
a = CAS latency
b = tRP
c = tRCD
d = tSAC
e = SPD revision
f = tTBD
R = Registered DIMM
For example, a DIMM with the mark PC100-222-620R specifies a
registered 100-MHz module that conforms with SPD version 1.2 and
has 2 clocks, a tRP and tRCD of 2, and a tSAC of 6 ns.
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