yes and no. Without applying a voltage regulator to your motherboard its not. If you want to go to the trouble of putting one on and perhaps frying your chip and mobo go ahead. Why do you want to put the voltage that high anyway??

It is just a question ...
 
I've bought KG7 yesterday with TB 1000/266 and I was reading posts
about overclocking.
There are some successes with 2.10 V @ 1600Mhz ...It wasn't clear for me how to get such high voltage ...
 
 
 
D.

Unless a BIOS revision has it, a voltage mod is the only way. At that point, something like Vapochill or a water cooling setup would be required; even the Swiftech MCA 462 with the mighty Delta wouldn't do it.
If you have the skillz, time, money, and balls to do it, be my guest. I do overclock, but aside from the "pencil trick" and changing the fan on my MX, I'm not going to go to great lengths to overclock.
Also, having a particular stepping will play a major role in that. Get the right chip, and that 2.10 voltage might not be necessary.