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RamCity guarantees 100% that all modules below are compatible with the ASUS/ASmobile Crosshair Motherboard II Formula

Kingston ValueRam 4GB CL5 240-pin DIMM Kit (2x2GB)

Part #. KVR667D2N5K2/4G • DDR2-667 / PC2-5300 • CL5 • 1.8V • more info

Buy new: $181.99 $141.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 4GB CL6 240-pin DIMM Kit (2x2GB)

Part #. 2xCCK • DDR2-800 / PC2-6400 • CL6 • 1.8V • 16-chip 128M x8 • more info

Buy new: $150.99 $117.99

6 in Stock Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL5 ECC 240-pin DIMM Kit (2x2GB)

Part #. KVR667D2E5K2/4G • DDR2-667 / PC2-5300 • CL5 • ECC • 1.8V • more info

Buy new: $191.99 $149.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 4GB CL6 ECC 240-pin DIMM Kit (2x2GB)

Part #. 2xCCB • DDR2-800 / PC2-6400 • CL6 • ECC • 1.8V • 18-chip 128M x8 • more info

Buy new: $183.99 $143.99

5 in Stock Free Shipping Guaranteed Compatible

Kingston HyperX 4GB CL4 240-pin DIMM Kit (2x2GB)

Part #. KHX6400D2LLK2/4G • DDR2-800 / PC2-6400 • CL4 • 1.95V • more info

Buy new: $210.99 $164.99

1 in Stock Free Shipping Guaranteed Compatible

RamCity 4GB CL5 ECC 240-pin DIMM Kit (2x2GB)

Part #. 2xAPL • DDR2-667 / PC2-5300 • CL5 • ECC • 1.8V • 18-chip 128x8 • more info

Buy new: $176.99 $137.99

1 in Stock Free Shipping Guaranteed Compatible

Kingston ValueRam 4GB CL6 ECC 240-pin DIMM Kit (2x2GB)

Part #. KVR800D2E6K2/4G • DDR2-800 / PC2-6400 • CL6 • ECC • 1.8V • more info

Buy new: $191.99 $149.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston HyperX 4GB CL5 240-pin DIMM Kit (2x2GB)

Part #. KHX6400D2K2/4G • DDR2-800 / PC2-6400 • CL5 • 1.85V • more info

Buy new: $209.99 $163.99

Ships in 7 Days Free Shipping Guaranteed Compatible

Kingston HyperX 4GB CL5 240-pin DIMM Kit (2x2GB)

Part #. KHX6400D2B1K2/4G • DDR2-800 / PC2-6400 • CL5 • 1.85V • more info

Buy new: $197.99 $154.99

Ships in 7 Days Free Shipping Guaranteed Compatible

RamCity 4GB CL5 240-pin DIMM Kit (2x2GB)

Part #. 2xAPM • DDR2-667 / PC2-5300 • CL5 • 1.8V • 16-chip 128x8 • more info

Buy new: $150.99 $117.99

Ships in 7 Days Free Shipping Guaranteed Compatible

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.
This system supports both ECC (KVRxxxD2Exx/xx) and non-ECC (KVRxxxD2Nxx/xx) memory.
Mixing ECC and non-ECC modules is not recommended.
AMD Sempron processors support DDR2-533 and DDR2-667 memory only.
DDR2-800/1066 modules are not supported with this processor.
If 4GB is installed, the recognized memory may be reduced to 3.5GB or less (depending on system configuration and memory allocation).
A 64-bit Operating System is required to utilize more than 4GB of memory.
DDR2-1066 is supported by AM2+/AM3 CPUs only.

Standard Memory:

0MB (Removable)

Maximum Memory:

2GB using DDR2-1066 in one DIMM channel
8GB using DDR2-667/800

Expansion:

4 Sockets

CPU/Chipset:

AMD Athlon 64 X2 (AM2) Nvidia nForce 780a SLI
AMD Phenom FX (AM2+) Nvidia nForce 780a SLI
AMD Phenom (AM2+) Nvidia nForce 780a SLI
AMD Sempron (AM2) Nvidia nForce 780a SLI

Bus Architecture:

PCI; PCI Express; SSD - SATA 2.5-inch; USB

Upgrade Path:

Virtually any configuration up to 8GB can be reached using any combination of 512MB, 1, and 2GB modules or kits.

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RamCity guarantees 100% that all modules below are compatible with the ASUS/ASmobile Crosshair Motherboard II Formula