Unfortunately, I don't tend to notice when Linux drivers get released; it's something I want to report more frequently on. Luckily, this time, I heard about NVIDIA's 370.28 graphics drivers while they were still fresh. This one opens up overclocking (and underclocking) for GeForce 10-series GPUs, although NVIDIA (of course) mentions that this is “at the user's own risk”. It also fixes a bunch of Vulkan bugs.
Many of these fixes were in the previous, but beta-class drivers, 370.23. It, like 370.28, also includes experimental support for PRIME Synchronization. PRIME handles choosing which GPU drives a given display, which may be different from the GPU that is rendering that image. I'm not too familiar with the system, and I've heard some jokes from the Linux community over the last couple of years about its almost vaporware-like status, but I don't have any personal experience with it.