[binary_sandman]

i have the same model of ram but in 2gb version i overclock very easy
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rigg* ASUS A8N-SLI MB/AMD X2 3800; WD 250GB SATA2; ASUS DVD DRIVE DUAL LAYER; 2GB DDR 400 CORSAIR CAS(2.5-3-3-6)xms version; eVGA GeForce 6800 GS 256MB CLOCK(1.1GHZ)
NZXT LEXA W 500WATT PSU;best case ever

 

[binary_sandman]

The corsair xms series was built to overclock the operating frequency with lower CAS LANTECY
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I know because i have the corsair xms series 1*2gb overclocked it at
cas(2.5-3-3-6) and staying at default latency its operating frequency is 240mhz it is possible.