User`s guide

76 • Hardware Upgrade and Replacement Procedures R Series Data Center Products User’s Guide, Rev. B
Field-Replaceable Units (FRUs) are items that trained service providers and the
ClearCube Systems Engineer (SE) group can replace onsite. FRUs include the CRUs,
plus these:
• Power supply
• CPU fan, blower, or heatsink
Other components such as the processor or motherboard are not intended for field
replacement. Removal voids your warranty. Contact ClearCube Technical Support for
assistance.
Upgrading Memory
Model R1300
The R1300 can work with a single DIMM, as well as two DIMMs of different sizes and
speeds. When equal size DIMMs are used, the memory controller on the R1300 uses
interleaved memory, which gives better performance.
To replace or upgrade the memory on the R1300, do the following:
1. Pull the tabs on either side of the memory socket apart to remove the module.
2. Carefully insert the new memory module into the socket, making sure that the
tabs snap inward securing the module in place.
NOTE: Using mismatched DIMMs incurs a performance penalty. With equal-sized
DIMMs, a mismatch in speed or timing causes the system to run at the slower
of the two DIMMs. With mismatched sizes, the system always runs in
non-interleaved mode at the slower speed or timing of the two DIMMs.
Model R2200
The memory upgrade steps for the R2200 PC blade are the same as above, but
because the memory architecture being interleaved, the memory modules must be
installed in matched pairs on each DDR bus.
Figure 34 R1300 Memory Layout
DIMM
slots