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RamCity guarantees 100% that all modules below are compatible with the IBM/Lenovo ThinkStation C20x

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RamCity 24GB CL9 ECC Registered 240-pin DIMM Kit (3x8GB)
Part #. 3xCPV • DDR3-1333 / PC3-10600 • CL9 • ECC • Dual Rank • Registered • 1.5V • 36-chip 512Mx4 •  more info
Buy new: $578.99 $451.99

4 in Stock Free Shipping Guaranteed Compatible

Kingston 24GB ECC Registered 240-pin DIMM Kit (3x8GB)
Part #. KTL-TS313K3/24G • DDR3-1333 / PC3-10600 • ECC • Registered • 1.5V •  more info
Buy new: $1,128.99 $881.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 12GB CL9 ECC Registered 240-pin DIMM Kit (3x4GB)
Part #. 3xCDT • DDR3-1333 / PC3-10600 • CL9 • ECC • Dual Rank • Registered • 1.5V • 36-chip 256Mx4 •  more info
Buy new: $345.99 $269.99

5 in Stock Free Shipping Guaranteed Compatible

Kingston 12GB ECC Registered 240-pin DIMM Kit (3x4GB)
Part #. KTL-TS313K3/12G • DDR3-1333 / PC3-10600 • ECC • Registered • 1.5V •  more info
Buy new: $670.99 $523.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston 8GB ECC Registered 240-pin DIMM
Part #. KTL-TS313/8G • DDR3-1333 / PC3-10600 • ECC • Registered • 1.5V •  more info
Buy new: $341.99 $266.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 6GB CL9 ECC Registered 240-pin DIMM Kit (3x2GB)
Part #. 3xBBC • DDR3-1333 / PC3-10600 • CL9 • ECC • Dual Rank • Registered • 1.5V • 18-chip 128Mx8 •  more info
Buy new: $191.99 $149.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston 6GB ECC Registered 240-pin DIMM Kit (3x2GB)
Part #. KTL-TS313K3/6G • DDR3-1333 / PC3-10600 • ECC • Registered • 1.5V •  more info
Buy new: $301.99 $235.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston 4GB ECC 240-pin DIMM
Part #. KTL-TS313E/4G • DDR3-1333 / PC3-10600 • ECC • 1.5V •  more info
Buy new: $136.99 $106.99

9 in Stock Free Shipping Guaranteed Compatible

Kingston 4GB ECC Registered 240-pin DIMM
Part #. KTL-TS313/4G • DDR3-1333 / PC3-10600 • ECC • Registered • 1.5V •  more info
Buy new: $240.99 $187.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 4GB CL9 ECC Registered 240-pin DIMM
Part #. CDT • DDR3-1333 / PC3-10600 • CL9 • ECC • Dual Rank • Registered • 1.5V • 36-chip 256Mx4 •  more info
Buy new: $172.99 $134.99

15 in Stock Free Shipping Guaranteed Compatible

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We guarantee your memory upgrade will be 100% compatible, or return it within 1 Whole Year for a full refund.
Need some help installing your upgrade? See our guides and videos.
System Specifications
Comments:
  • DDR3-1333 modules automatically clock down to 1066MHz and 800MHz depending on which Intel Xeon model is used and the number of modules installed.
  • This system supports either Registered ECC or Unbuffered ECC memory.
  • Mixing Registered ECC and Unbuffered ECC modules is not supported within this system.
Standard Memory:
  • 2GB (Removable) or
  • 4GB (Removable)
Maximum Memory:
  • 48GB ECC UDIMMs
  • 96GB Reg ECC RDIMMs
Expansion:
  • 6 Sockets (2 banks of 3) per CPU 12 Sockets (4 banks of 3) using two CPUs
CPU/Chipset:
  • Intel Xeon Intel 5520
Bus Architecture:
  • PCI; PCI Express; SSD - SATA 2.5-inch
Mfr's System P/N's:
  • 4266-xxx; 4269-xxx; 4272-xxx
Upgrade Path:
  • Virtually any configuration up to 96GB can be reached using 2, 4, and 8GB modules.