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Notebook Samsung RC510 (NP-RC510-S01PL) I have 2x2GB Samsung RAM memory, that are able to work with 633MHz (PC3-10600S). But when I check with CPU-Z I see they are works on 533 Mhz. Notebook is new, RAM factory default likewise. Have you anu idea?

Hennes
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Saint
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Most likely the memory controller on the CPU does not support speeds above 533MHz (1066MHz DDR)

I believe your laptop has a Core i3 CPU which has that limit: http://ark.intel.com/products/50178/

Richie Frame
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  • Yes, I agree with the above part. Also maybe the BIOS is recognizing the Default SPD speed (1066MHz) rather than the rated speed (1333MHz). Sometimes the BIOS may have an option to adjust the memory speed manually so check it. – wit Oct 28 '13 at 17:15