The memory specifications for that processor are posted on this site:
So the memory controller for this processor supports 1333 mhz memory.
Just confirm with the memory manufacturer that the voltage of the memory is 1.5v and that should be fine.
Do you mean that as long as I select DDR3-1333mhz for memory manufacturer with the voltage of the memory less than 1.65V, and 1.5V or less indicates higher quality RAM, then will any memory manufacturer be fine?
I just find out that another model is listed and confirmed for P7H55-M/USB3, but describe nothing about how to match ram mhz with CPU Ghz.
KINGSTON KVR1333D3N9/4G 4GB DS Hynix H5TQ2G83AFR
Could you please give me any suggestions on how I know what mhz for ram will match with CPU Ghz?
For i3-540 Processor (3.06 GHz), there is slightly difference in GHz between i3-530 and i3-540, would both use DDR3-1333 mhz ram be fine? is there any calculation for matching between ram and CPU?
Thank you very much for any suggestions
From our side we recommend using DDR3 memory with 1.5V.
Concerning your question about the memory speeds that can be used with a processor you can check that information on the memory types section of the information included on ark.intel.com as shown on these sites:
Mother board manufactures test vendor memory on their systems and memory vendors test memory with the mother board from many mother board vendors.
If this memory is not on Asus list and / or Kingston does not list your mother board with this memory, you are taking a big chance that it may not work.
It will likley not be supported by Asus if you have any troubles, however I just noticed that this dimm is listed for the board under the Lynnfield CPU which makes it lower risk.
It will likley work fine, but I would still stick to something on the vendors supported list (because I hate to spend money on memory and then later find out that the board BIOS does not support the dimm even if the processor and QPI bus should).