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I would advise you to do one of two things:
1) Go to crucial.com and enter your system information into the RAM advisor. I'll bet it recommends Crucial DDR3-1600 (PC3-12800). I have used this on motherboards that only support DDR3-1066 and DDR3-1333. You won't see any benefit out of the faster speed, however. Crucial memory is usually available in a few different latencies, e.g. a CL of 7, 9, or 11, with the lower numbers providing the best performance, but you will probably need to go into BIOS and explicitly enter the faster speeds (7-7-7-24, 9-9-9-24, or 11-11-11-x; look on the stick label for the exact values). The more expensive, the lower (faster) the CL.
2) Buy Corsair XMS3 DDR3-1333 (but not the one with a punked-out heatsink) which is still available at Newegg. I have had 100% success with them.
There are posts in this and other forums complaining about over-clocker memory. They're fine in motherboards that support the listed speed, but they sometimes present a problem on older motherboards.
Here are the officially supported memory sticks: System Memory for the Intel® Desktop Board DP55WB.
This message was posted on behalf of Intel Corporation
The recommended memories for Intel® Desktop Board DP55WB are DDR3 1066 and 1333MHz at 1.5V. The maximum amount supported is 16GB.