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RamCity guarantees 100% that all modules below are compatible with the ASUS/ASmobile K Series Motherboard KFSN5-D/IST

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Kingston ValueRam 8GB CL5 ECC Registered 240-pin DIMM Kit (2x4GB)
Part #. KVR667D2D4P5K2/8G • DDR2-667 / PC2-5300 • CL5 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $594.99 $464.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 8GB CL6 ECC Registered 240-pin DIMM Kit (2x4GB)
Part #. KVR800D2D4P6K2/8G • DDR2-800 / PC2-6400 • CL6 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $594.99 $464.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL6 ECC Registered 240-pin DIMM Kit (2x2GB)
Part #. KVR800D2S4P6K2/4G • DDR2-800 / PC2-6400 • CL6 • ECC • Single Rank • Registered • 1.8V •  more info
Buy new: $302.99 $236.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL6 ECC Registered 240-pin DIMM Kit (2x2GB)
Part #. KVR800D2D8P6K2/4G • DDR2-800 / PC2-6400 • CL6 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $249.99 $194.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL6 ECC Registered 240-pin DIMM
Part #. KVR800D2D4P6/4G • DDR2-800 / PC2-6400 • CL6 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $307.99 $240.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL5 ECC Registered 240-pin DIMM
Part #. KVR667D2D4P5/4G • DDR2-667 / PC2-5300 • CL5 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $304.99 $237.99

8 in Stock Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL5 ECC Registered 240-pin DIMM Kit (2x2GB)
Part #. KVR667D2S4P5K2/4G • DDR2-667 / PC2-5300 • CL5 • ECC • Single Rank • Registered • 1.8V •  more info
Buy new: $329.99 $257.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL5 ECC Registered 240-pin DIMM Kit (2x2GB)
Part #. KVR667D2D8P5K2/4G • DDR2-667 / PC2-5300 • CL5 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $254.99 $198.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston ValueRam 2GB CL6 ECC Registered 240-pin DIMM
Part #. KVR800D2D8P6/2G • DDR2-800 / PC2-6400 • CL6 • ECC • Dual Rank • Registered • 1.8V •  more info
Buy new: $171.99 $133.99

4 in Stock Free Shipping Guaranteed Compatible

Kingston ValueRam 2GB CL5 ECC Registered 240-pin DIMM
Part #. KVR667D2S4P5/2G • DDR2-667 / PC2-5300 • CL5 • ECC • Single Rank • Registered • 1.8V •  more info
Buy new: $182.99 $142.99

Ships in 7 Days 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:
  • MODULES MUST BE ORDERED AND INSTALLED IN PAIRS for Dual Channel Mode.
  • Kingston offers "K2" kit part numbers for Dual Channel Mode.
  • Mixing DDR2-533 Registered DIMMs with DDR2-667/800 Registered with Parity DIMMs is not recommended.
  • Mixing x4 and x8 modules is allowed, however not within the same bank.
  • There is a limit of eight total memory ranks installed in the first two banks of each processor using DDR2-667 and DDR2-800.
  • If this limitation is exceeded, the memory will clock down to 533MHz.
  • Only systems with AMD's Opteron Socket F 45-nm CPU can use the DDR2-800 part numbers.
Standard Memory:
  • 0MB (Removable)
Maximum Memory:
  • 64GB with 2 CPUs installed
Expansion:
  • 16 Sockets Total 8 Sockets (4 banks of 2) per CPU
CPU/Chipset:
  • AMD Opteron (Socket F) Nvidia nForce 3600 Professional
Bus Architecture:
  • PCI; PCI Express; PCI-X; SSD - SATA 2.5-inch; USB
Upgrade Path:
  • Virtually any configuration up to 64GB can be reached using 512MB, 1, 2, and 4GB modules IN PAIRS or kits, with two processors installed.