Hey there, I have a VAIO see sig. It is impossible to O'C that system, better off in building a new one if that is your intention or even to upgrade. I installed a r9700pro in my VAIO and it became unstable and the PSU is about to go...so I took it out and things are a little better but still get some lockups due to the PSU.
The PSU on that rig you have is only 268W and is propritary and will not be able to upgrade with a standard ATX PSU because the dimensions are little different. You can transfer to a new case, but I hear from others that have that the recovery discs will not work and other hardware will not work. This is because the motherboard is strictly built to run with Sony VAIO harware and software.
I've done so much research and questioning around to come with one conclusion...build your own rig. So that is why I am, all so that I can finally use and O'C my r9700pro, because that card rox!!!
Hope this helps and wish you the best!!
