Nvidia GeForce GTX 660 Ti 2GB Review

Written by Harry Butler

August 16, 2012 | 12:50

Tags: #geforce-gtx-660-ti #gtx-660-review

Companies: #nvidia

Power Consumption (Idle and Gaming)


Putting a realistic, repeatable load on a GPU to get a decent idea of its real world power consumption and thermal output has long been something with which we've experimented here at bit-tech. We've found that synthetic benchmarks such as FurMark thrash the GPU constantly, which simply isn't reflective of how a GPU will be used when gaming.

It's such a hardcore test that any GPU under scrutiny is almost guaranteed to hit its thermal limit; the mark at which the card's firmware will kick in, speeding up the fan to keep the GPU within safe temperature limits. Conversely, simply leaving a game such as Crysis running at a certain point also isn't reflective of real-world use. There's no guarantee that the GPU is being pushed as hard as other titles might push it, and the load will vary between play-throughs.

We used to use the Canyon Flight test of 3DMark 06, as this was a punishing and repeatable test. However, we've now adopted Unigine's Heaven 2.5 benchmark, as its DirectX 11 features will stress all the parts of a modern GPU. We use the default settings and a resolution of 1,920 x 1,080. We also check that 4x AA and 4x AF are enabled and that tessellation is set to Standard. We then hit the Benchmark button and watch the power draw from the wall between the grass field scene and the second dragon scene - this is the toughest portion of the test for both Nvidia and AMD hardware.

We also have GPU-Z running in the background, and leave the Unigine benchmark running for ten minutes to record a peak GPU temperature. We present the temperature as a delta T (the difference between the temperature of the GPU and the ambient temperature in our labs).

Power consumption (idle)

Windows 7 Aero Desktop

  • AMD Radeon HD 7870 2GB
  • AMD Radeon HD 7970 3GB GHz Edition
  • Nvidia GeForce GTX 670 2GB
  • Nvidia GeForce GTX 680 2GB
  • AMD Radeon HD 7950 3GB
  • MSI GeForce GTX 660 Ti 2GB Power Edition
  • Zotac GeForce GTX 660 Ti 2GB amp! Editon
  • AMD Radeon HD 7970 3GB
  • AMD Radeon HD 7950 3GB with Boost
  • Nvidia GeForce GTX 690 4GB
  • 87
  • 87
  • 88
  • 89
  • 89
  • 90
  • 90
  • 90
  • 92
  • 96
0
25
50
75
100
System Power consumption in Watts

Power consumption (load)

Unigine Heaven Benchmark (1,920 x 1,080 4x AA 4x AF)

  • AMD Radeon HD 7870 2GB
  • Zotac GeForce GTX 660 Ti 2GB amp! Editon
  • AMD Radeon HD 7950 3GB
  • Nvidia GeForce GTX 670 2GB
  • MSI GeForce GTX 660 Ti 2GB Power Edition
  • Nvidia GeForce GTX 680 2GB
  • AMD Radeon HD 7950 3GB with Boost
  • AMD Radeon HD 7970 3GB
  • AMD Radeon HD 7970 3GB GHz Edition
  • Nvidia GeForce GTX 690 2GB
  • 188
  • 222
  • 227
  • 230
  • 242
  • 256
  • 257
  • 293
  • 315
  • 373
0
100
200
300
400
System Power consumption in Watts

Thermal Performance

Heat (idle)

Windows 7 Aero Desktop

  • AMD Radeon HD 7870 2GB
  • MSI GeForce GTX 660 Ti 2GB Power Edition
  • Nvidia GeForce GTX 690 4GB
  • Zotac GeForce GTX 660 Ti 2GB amp! Editon
  • Nvidia GeForce GTX 670 2GB
  • Nvidia GeForce GTX 680 2GB
  • AMD Radeon HD 7970 3GB GHz Edition
  • Palit GeForce GTX 680 2GB JetStream
  • AMD Radeon HD 7970 3GB
  • AMD Radeon HD 7950 3GB
  • AMD Radeon HD 7950 3GB with Boost
  • 6
  • 8
  • 10
  • 11
  • 11
  • 11
  • 11
  • 12
  • 14
  • 15
  • 16
0
3
5.5
8
10.5
13
15.5
18
Delta T in °C

Heat (load)

Unigine Heaven Benchmark (1,920 x 1,080 4x AA 4x AF)

  • AMD Radeon HD 7870 2GB
  • Zotac GeForce GTX 660 Ti 2GB amp! Editon
  • MSI GeForce GTX 660 Ti 2GB Power Edition
  • AMD Radeon HD 7950 3GB with Boost
  • AMD Radeon HD 7970 3GB
  • Palit GeForce GTX 680 2GB JetStream
  • Nvidia GeForce GTX 680 2GB
  • AMD Radeon HD 7970 3GB GHZ Editon
  • Nvidia GeForce GTX 670 2GB
  • AMD Radeon HD 7950 3GB
  • Nvidia GeForce GTX 690 4GB
  • 40
  • 43
  • 47
  • 50
  • 53
  • 54
  • 54
  • 54
  • 55
  • 57
  • 63
0
10
20
30
40
50
60
70
Delta T in °C

*as there's no stock model of the HD 7850 2GB, it is not included in these graphs

Read our performance analysis.
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