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Nvidia’s GTX680 uses a system of ‘dynamic’ overclocking, otherwise known as ‘Boost clocks’.
This Boost clock mode uses a variety of factors to determine whether it is a good idea to run at higher speeds, or not as the case may be. It analyses power consumption, GPU load, temperature and memory load, among other factors.
The driver is coded to make on the fly decisions about what clock speed is safe in comparison with heat output and power use. The automatic overclocking algorithms need to be coded with a variety of safety parameters.
Above, the KFA2 GeForce GTX 680 LTD OC. We can see that the boost speed is set to 1,268mhz (from a default of 1,059mhz). This is the ‘average’ clock speed that the core will run under during typical gaming load. The clock speed may actually exceed this speed depending on the given situation.
For overclocking today we used MSI’s Afterburner software. We spent a long time playing with the card and analysing how far we could push it without encountering instability.
We weren't expecting any headroom, especially as this card is supplied in such a crazy state of overclock. We did however manage to increase the voltage and push the card to a staggering 1,285mhz core and 1,658mhz memory (6,632mhz effective).
Overclocking the card even further produces a score of 11,394 points, not too far from a GTX580 SLi configuration. We can see just how far Nvidia have moved since the last generation of hardware.
damn, thats a mega card, more than my whole system cost however!
White pcb is really awesome, never seen that done before. wozzers, can never buy this b aby, off to try and win it now !
Yeah that is serious. Im not easy impressed but KFA2 are right up there now with the best of them after seeing this.
Very sexy, looks like the knd of card you can only dream about
Small fortune but very sexy. Nv for the win
Not available online sadly. Any ideas when they will have stock?
damn the more I re-read this, the more I want it 🙁 sucks to be a student.
The price is ridiculous for most people, but a good point is made in the conclusion. People who buy these kind of cards really dont care. ive seen reviews dock two points for a price over £500 when really the people who buy these and read the reviews tend to focus on overclocking, temps and how easy it would be to watercool 🙂
holy bank balance batman!
No SLI results? :p come on, lets see SLI across 4 screens next 🙂
Im not so sure on the white to be honest. its quite sore on the eyes. Id like it in pink. any takers?
Whats the significance of the ‘hall of fame’ stamp on the back of the PCB? anyone know
Great pics by the way, I can see every transistor on the board. really nice idea.
its a awesome gpu no doubt……i called it a beast
That looks like a Awesome card 3 fans OMG.
this is the highest factory oced gtx 680,overvoltage it with afterburner 2.2.3 ,i think it will reach 1.45 ghz +core clock,maybe better buy than the msi lightning 680