It can maybe go a little higher. I have some increase, but since I have 2.05GH/s, I dunno if I improved it all of 7.895%.
Do you have a miner that you tweaked? I've heard good things about your bins.
Yeah, I rewrote both the CPU and GPU implementations of Blake-256, did a bunch of mods, fixing one possible integer overflow, reducing CPU usage by 3x - 4x, and, of course, modified the kernel enqueue to take my custom kernel. Also modified what is passed to the kernel, and how it's passed, which is why this was necessary. Added a 64-bit target, too, so it doesn't waste CPU time returning every share that meets diff 1.