Frankly, though, the GeForce GTX 980's primary purpose is gaming. So to be fair, we're only looking at the card's efficiency in that context. After the launch, we'll spend more time covering the other disciplines in a follow-up story.
Maxwell does very well, even without Gigabyte’s golden sample factored in. This observation is based on the power consumption measurements in our 2014 VGA charts. If Nvidia's reference GeForce GTX 980 sets the bar at 100 percent, then all of the other Maxwell-based cards fall in line right above it. Non-Maxwell-based boards show up below. Not surprisingly, Gigabyte’s golden sample ends up at the top, and even manages to pass a GeForce GTX 750 in the process, which is no small feat for a card built using a large GPU.
Thinking back to the maximum versus average power consumption findings for gaming, one fact becomes abundantly clear: AMD’s issue is not absolute performance or the efficiency of its architecture, but rather that PowerTune technology can’t adjust the power consumption quickly or finely enough depending on the actual load. This is exactly where Nvidia scores most of its points with Maxwell.
But even Nvidia can’t change the laws of physics. The new cards’ power consumption during compute-based testing demonstrates this fact very clearly. There are some ways around these laws, however, and the company's engineers seem to have found them. A gamer would say that they simply have the better skills.

- Introducing GM204: There's A New Maxwell In Town
- New Features
- Nvidia GeForce GTX 980 Reference Card
- Gigabyte GTX 980 WindForce OC
- Gigabyte GTX 970 WindForce OC
- EVGA GTX 970 Superclock ACX 2.0
- Test System And Benchmarks
- Results: Battlefield 4 And Thief
- Results: Arma 3 And Grid Autosport
- Results: Assassin's Creed IV, Watchdogs, Far Cry 3
- A New Power Consumption Test Setup
- Power Consumption In Detail
- Power Consumption Overview
- Efficiency
- Temperatures And Noise
- Verdict

Looks like The Gtx 980 will become a part of my build family!
so roll on next week and hopefully they will have them back in stock...
-Top performance as always
-Low power consumption
-A right price this time XD
-Top performance as always
-Low power consumption
-A right price this time XD
nvidia
I have an oldish Antec TP New Series 650 watt modular psu. I had the gtx970 on one 25A 12v rail feeding the 8+6 connectors. It seems this was possibly not enough to cope with the peaks. Not up on psus but with 80% efficiency that 25x12 is not a full 300 watts - more like 240watts. So, I added another 12v rail for the 6pin and hey presto it worked fine no issue.
So anyone with such an issue might try this or get a more powerful psu.