Low fps on high-end pc

I recently decided to try out the HTML5 beta for myself today. The graphics themselves looked pretty impressive, but the framerate was unusually low in deserted areas (15-20 fps) and in crowded ones (10-15 in GE, World 3) Reducing draw distance, disabling FXAA, and killing shadows helped somewhat, but not significantly; in fact, reducing all graphics settings to their respective minima only yielded 20 fps in GE at best. I’m curious as to whether this is largely the fault of my machine or the fact that the HTML5 version is still an unoptimized beta. Here are the relevant specs:

OS: Windows 7 Home Premium
CPU: Intel Core i7-3770K @ 3.5 GHz
GPU: nVidia GTX 670 (2 GB vRAM)
RAM: 16 GB DDR3
Browser in Use: Google Chrome

I know that this forum probably gets a million of these threads every day, but I wanted to make sure my problem wasn’t specific to my particular hardware. Any tips on what I can do outside of the game to bump up FPS? Furthermore, is there a way to make sure RS is using my dedicated GPU (I only know of how to do this using the non-HTML5 downloadable client)?

The thing that stands out the most to me is the CPU not being overclocked. I now believe you currently need at least 4Ghz possibly 4.2 or more. I don’t think it is worth bothering with that though just for HTML5 and if you don’t know what you are doing you can damage the computer.

The other thing that will boost FPS is disabling hyperthreading in the bios (RS Gold is single threaded so is hampered by it). Another case of having to go into the bios so only do it if you know what you are doing.

Personally I’d just wait until Jagex optimises the client further. It isn’t worth messing about with the bios just for one game. It doesn’t even look that great as it is really..