Accessory purveyor OWC has unboxed and torn down the new 2015 Retina iMac. In a blog post, the company has noted that the new model has retained the 2-lane PCI-e SSD upgrade slot "whether ordered with a SSD or not," can take 32GB of RAM. Additionally, the 3.3GHz model uses a Radeon R9 M290 GPU, versus the M290X in the faster models.
