Software

At the time of writing ASUS's GPU Tweak for the GTX 680 wasn't publicly available yet, but we managed to nab a screenshot from the review guide. In this and other similar brand OC utility we have the option to set offset values for the core clocks and voltages as well as a new option called Power Target (like PowerTune on AMD boards) to extend the TDP cap to 137%. As we have covered in other recent ASUS graphics card reviews before, GPU Tweak also comes with FRAPS-like screenshot/video recording features and a live update utility to check for VGA BIOS updates.

gputweak ASUS GTX 680 2GB Overclocking Review: Win Some Lose Some

Thermals, Power Usage and Overclocking

Methodology: We set the fans to 100% (strangely the sliders will only let us apply 85%) and looped Unigine Heaven 3.0 on extreme settings for 10 minutes and took the maximum temperature from the ondie sensor. Ambient temperature was 18 degrees.

 

At stock settings, we see some kind of turbo boost bringing the core clock to 1137MHz. At this point temperatures maxed out at 52 degrees celsius and the card used ~180W of power.

stocktemps ASUS GTX 680 2GB Overclocking Review: Win Some Lose Some

 

After applying a +200MHz core offset overclock (bringing it to an effective l33t MHz) combined with a 100mW voltage boost and TDP cap raised to 137%,  we got a maximum of 59 degrees celsius on the core and ~210W of power used.

octemps ASUS GTX 680 2GB Overclocking Review: Win Some Lose Some

 

 

Test Setup

cpuz ASUS GTX 680 2GB Overclocking Review: Win Some Lose Some

 

CPU: Intel Core i7-3960X @ 4817MHz 1.52v
Motherboard: ASUS Rampage IV Extreme (Bios 1103)
Memory: G.Skills ARES 2133Mhz DDR3 16GB Kit
Power Supply: Antec True Quattro Pro 1200W
Storage: Intel 520 series 250GB SSD
Graphics Cards / Drivers:

300.99 drivers:

ASUS Geforce GTX 680

 

296.10 WHQL drivers:

ASUS GTX580 DirectCU II 1.5GB

 

8.960 beta drivers:

MSI R7970 Lightning 3GB

AMD Reference Radeon HD 7970 3GB

Sapphire Radeon HD 7950 OC Edition

AMD Reference Radeon HD 7870 2GB

ASUS HD6970 DirectCU II 2GB