No there really is nothing you can do at the moment. That motherboard was mostly designed for a single slot GPU. This would make the GPU thinner, not so much shorter, and keep it away from the Front panel header. This was a just a poor design from ASRock. The issue is that on micro-ATX boards you do not have a lot of room for the SATA connections and the front panel header.
BTW you had a typo on the model number, it is a 880GM-LE board, no biggie lol, I had already looked it up because I could see the model number on the BIOS chip in the pic you posted.