We understand you would like to know if the Intel® SSD 750 series (Add-In Card) can be used with your Intel® Desktop Board DX58SO2.
One thing you need to verify is the requirements of the disk that can be found https://www.intel.com/content/www/us/en/support/memory-and-storage/consumer-ssds/000005797.html on this link. Based on that, we also verified the specs of your motherboard and it shows that uses the PCIe Gen 2, which is not the recommended for this disk.
http://ark.intel.com/products/50242/Intel-Desktop-Board-DX58SO2 Here are more specs of your motherboard.
Besides all this, most likely the motherboard does not also offer NVMe* support, a reason why it won't actually be detected.
Hope this information can be useful.
We are wondering if you were able to read our previous post and if you require further assistance. We'll be waiting for your response.