Though tested memory list for DX58SO does not state any memory with more than 1.6V however there are 3rd party tested memories that work with DX58SO. I checked for you and there are a couple of Corsair memories that have been tested in accordance with 3rd party memory test. I must also mention that a 3rd party memory test occurs as requested by the memory vendors and is tested at an independent memory house that is not a part of Intel - Computer Memory Test Labs (CMTL).
Here are the 2 memory models from Corsair that work with DX58SO (TR3X6G1333C9, TR3X6G1600C9) one of which is 1.65V (TR3X6G1600C9) and there is a possibility that your memory modules might also work with DX58SO ... BUT ... I always recommend our users to go according to THOL (Tested Hardware and Operating Systems List) because Intel does not take any responsibility for incompliance if the product is used not in accordance with the THOL. I would also not advise you to take my word for it and assume it as heads-up on this memory, rather I would suggest that if you have not opened the memory packings, you return it to your vendor and get a replacement in accordance with THOL or 3rd party tested memory modules.
DX58SO Tested Memory List: http://www.intel.com/support/motherboards/desktop/dx58so/sb/cs-029865.htm
In case of any discrepancies, you are always welcome to contact us anytime and we'll be glad to help.
Thank you, have a nice day!
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Why is it that none the memory in the DX58SO Tested Memory List are 1600Mhz?
I purchased OCZ Gold @ 1600Mhz and the board automatically downclocked it to 1066... Trying to find a way to override it...