Originally Posted by GoldenTiger
People don't understand it because it's a brand new method... in a few days there will be more people re-stating the actual, correct info, and it will become common knowledge. There is no *user* direct control of the *max* voltage, just the minimum voltage. However, the card auto-volts up to the reference PCB's cap of 1.175v (it is limited by hardware to 1.21v actual, software reads 1.175 but digital multimeter tests by people have confirmed it's hitting the cap as well as eVGA's JacobF twitter). OC'ing is always a crapshoot on video cards, but the "difficulty" people are encountering is simply that nVidia limited the GPU vcore much lower than most of us on this site would like. The TDP isn't what's capping anything currently, but rather the reference pcb's voltage sensing limiter. Non-reference PCB's will likely allow for higher voltage limits to be set by turbo boost, and thus better oc'ing.
Tiger, why are you telling me all of this? Are you trying to justify the fact that nvidia locked out direct voltage control from users? All you're doing is trying to justify your purchase, and while I do infact agree that the GTX 680 is an incredibly well designed card and a step forward technologically, it doesn't change the fact that direct voltage tweaks are locked. In fact, you can't even get around this with a BIOS hack because it's digitally signed, and any sort of tampering attempt with the BIOS will brick the card (and void the warranty).
Auto-voltage adjustment is a feature built into all modern cards as a power-saving measure. The HD 5870 has it. The 8800 GTX had it. Virtually any modern video card has it. However, virtually all of those cards have the ability to override a driver setting and adjust the voltage on the 3D clock setting so the user can up their overclocks even further or stabilize an existing overclock. The GTX 680 lacks that ability, and that means that if someone wants to push their overclock a little bit higher for a benchmark or something, they're simply SOL.
Even you have to admit that having that extra voltage control would make the card overclock a helluva lot better. Instead, nvidia decided to play big brother this time around, and most people on this forum that enjoy overclocking their cards, either for records or for fun, aren't too happy about it. Frankly, I'm really surprised that you're avidly defending this practice by them.
Come on dude, give it a rest.