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Appendix A. System memory speed
The Intel Xeon microprocessor families compatible with this ThinkStation computer feature an integrated
memory controller, which provides the microprocessor with direct access to the system memory. Because
of this design, the system memory speed will be determined by a number of factors, including the
microprocessor model and the type, speed, size (capacity), and number of DIMMs installed. Refer to the
following table for the information on the supported system memory speed for your computer model.
Table 1. DIMM type and speed: PC3-10600U
DIMM size (capacity)
Number of DIMMs
installed per
microprocessor bank
Microprocessor model Memory frequency
Intel Xeon E5502, E5503,
E5504, E5506, E5507
800 MHz
Intel Xeon E5603, E5606,
E5607, E5520, E5530,
E5540, E5620, E5630,
E5640
1066 MHz
1 GB, 2 GB, 4 GB
1 to 3
Intel Xeon E5645, E5649,
X5550, X5560, X5570,
X5650, X5660, X5667,
X5670, X5672, X5675
1333 MHz
Table 2. DIMM type and speed: PC3-8500U
DIMM size (capacity)
Number of DIMMs
installed per
microprocessor bank
Microprocessor model Memory frequency
Intel Xeon E5502, E5503,
E5504, E5506, E5507
800 MHz
1 GB, 2 GB, 4 GB
1 to 3
Intel Xeon E5603, E5606,
E5607, E5520, E5530,
E5540, E5620, E5630,
E5640, E5645, E5649,
X5550, X5560, X5570,
X5650, X5660, X5667,
X5670, X5672, X5675
1066 MHz
Table 3. DIMM type and speed: PC3-10600R
DIMM size (capacity)
Number of DIMMs
installed per
microprocessor bank
Microprocessor model Memory frequency
Intel Xeon E5502, E5503,
E5504, E5506, E5507
800 MHz
Intel Xeon E5603, E5606,
E5607, E5520, E5530,
E5540, E5620, E5630,
E5640
1066 MHz
1 GB, 2 GB, 4 GB, 8 GB
1 to 3
Intel Xeon E5645, E5649,
X5550, X5560, X5570,
1333 MHz
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