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GIGABYTE GeForce GTX 780 OC WindForce 3X Graphics Card Review

GIGABYTE GeForce GTX 780 OC WindForce 3X Graphics Card Review

GIGABYTE GeForce GTX 780 OC WindForce 3X Graphics Card Review

Power, Temperatures and Overclocking

For idle power we list the full system use at the wall after sitting at the desktop with no activity for 5 minutes. Load power is the highest reading we saw for the full system when testing during this review. Temperatures are taken in the same way. Noise levels are taken after a period of prolonged gaming in a scenario which applied maximum load to the GPU. Finally, our CPU is running at full MHz when testing, speedstep etc disabled.

  Idle
Power
Load
Power
Idle
Temp
Load
Temp
GIGABYTE GTX 780 OC 191w 406w 33°C 69°C
NVIDIA GTX 780 190w 398w 35°C 80°C
AMD Radeon HD 7970 GHz OC 194w 368w 38°C 78°C

Before we talk about the above results it is worth noting that the GTX 780, like the GTX Titan/GTX 770, supports GPU Boost 2.0. With GPU Boost 2.0 NVIDIA have moved to thermal based readings and will boost the speed of the card to the highest possible level as long as the temperature remains below 80°C (with a power level not exceeding the rated spec). Clock speed and voltage are tweaked to maintain this as is fan speed with NVIDIA giving focus to low noise operation. The user also has control of the temperature target in software and can say, for example, that they wish the target to be 85°C rather than 80°C. Then for those who like overclocking with water, the lower temperatures this affords will mean consistently higher clocks due to being under 80°C and of course a good air cooler also has a similar effect.

So on with the results and in this test we see that the Gigabyte has very similar power readings to the standard card, just with a small increase from the overclock at load. Thermal performance is excellent, never rising above 69°C while maintaining near silent operation. That’s 11°C below a reference design card.

Overclocking

Overclocking tool

Overclocking the GTX 780 is a simple process; we open the new Gigabyte OC Guru tool and through moving a few options can increase the performance of the card. This includes having a play about with the voltage to try and maximise overclocking performance.

  Max OC (Core/Memory)
GIGABYTE GTX 780 OC
(954/1006 core / 1502 mem)
+99MHz Core/+102MHz Mem

  3DMark Stock 3DMark Overclock
GIGABYTE GTX 780 OC 4639 4819

Overall we get a nice increase from the manual overclock of the card, bringing us in just over 4800 points on FireStrike Extreme.

About Author

Stuart Davidson

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