you can either download the mediafire one or by the attachement section, they are the same. the upload was so long, I closed it. I thought the upload was canceled. So, I reuploaded it by mediafire because it’s faster.
The best way to get caustics in Cycles using the Blender lamps is to make sure you have ‘multiple importance checked’ as well as having the ‘filter glossy’ value to something like 0.20-0.25. Either way, you’re going to need a lot of samples to clear them up as Cycles is just a unidirectional pathtracer.
The extra noise you’re seeing might actually be the caustics starting to form, but you would need to confirm it by letting everything converge.
Also, your GPU crashing could be anything from lack of VRAM to overheating, you will need to make sure your cooling system is up to snuff as well as double-checking the VRAM statistics to see if it can handle moderately detailed scenes.