Sapphire Radeon HD 5870 1GB Vapor-X Review

Written by Harry Butler

December 1, 2009 | 08:06

Tags: #hd-5870 #overclocked #overclocking #performance #radeon #review #tested #vapor-x #vapour-x

Companies: #sapphire

Power Consumption (Idle and Gaming)

Putting realistic, repeatable load on a GPU to get a decent idea of its real world power consumption and thermal output has long been something 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 GPU will be used when gaming.

It's such a hardcore test that any GPU under test 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 like 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 do, and the load will vary from play through to play through.

Eventually then, we've decided to use 3DMark06's Canyon Flight test as a real world representative, repeatable graphics test. It's a ferociously demanding test, pushing graphics cards to their limit, but also containing peaks and troughs in performance that match real world game play.

As the test is so demanding and GPU limited, we've set 3DMark to run the test at 1,280 x 1,024 with 0xAA and 16xAF (enabled in the driver), constantly looping the test for thirty minutes and recording the maximum power consumption and GPU Delta T (the difference between the temperature of the GPU and the ambient temperature in our labs).

Power Consumption (idle)

Windows Vista Desktop (Aero Enabled)

  • ATI Radeon HD 5850 1GB
  • ATI Radeon HD 5770 1GB
  • ATI Radeon HD 5870 1GB
  • Sapphire Radeon HD 5870 1GB Vapour-X
  • Nvidia GeForce GTX 285 1GB
  • ATI Radeon HD 5970 2GB
  • Nvidia GeForce GTX 295 1,792MB
  • ATI Radeon HD 4870 X2 2GB
    • 127
    • 128
    • 130
    • 135
    • 144
    • 150
    • 176
    • 191
0
50
100
150
200
Power at socket (W)
  • GPU 1 Delta T in °C

Power Consumption (Load)

3DMark06 Canyon Flight test, 1,280 x 1,024 0xAA 16xAF, Peak Power Usage

  • ATI Radeon HD 5770 1GB
  • ATI Radeon HD 5850 1GB
  • ATI Radeon HD 5870 1GB
  • Sapphire Radeon HD 5870 1GB Vapour-X
  • Nvidia GeForce GTX 285 1GB
  • ATI Radeon HD 5970 2GB
  • Nvidia GeForce GTX 295 1,792MB
  • ATI Radeon HD 4870 X2 2GB
    • 219
    • 241
    • 268
    • 270
    • 305
    • 340
    • 375
    • 415
0
100
200
300
400
Power at socket (W)
  • GPU 1 Delta T in °C

Thermal Performance


Heat (idle)

Windows Vista Desktop (Aero Enabled)

  • Sapphire Radeon HD 5870 1GB Vapour-X
  • ATI Radeon HD 5870 1GB
  • ATI Radeon HD 5850 1GB
  • ATI Radeon HD 5770 1GB
  • Nvidia GeForce GTX 295 1,792MB
  • Nvidia GeForce GTX 285 1GB
  • ATI Radeon HD 5970 2GB
  • Nvidia GeForce GTX 285 1GB SLI
  • ATI Radeon HD 4870 X2 2GB
    • 9
    • 0
    • 13
    • 0
    • 19
    • 0
    • 20
    • 0
    • 21
    • 20
    • 22
    • 0
    • 23
    • 23
    • 27
    • 25
    • 45
    • 47
0
10
20
30
40
50
delta T (°C) (lower is better)
  • GPU 1 Delta T in °C
  • GPU 2 Delta T in °C

Heat (peak)

3DMark06 Canyon Flight test, 1,280 x 1,024 0xAA 16xAF, Peak Temperature

  • ATI Radeon HD 5770 1GB
  • Sapphire Radeon HD 5870 1GB Vapour-X
  • Nvidia GeForce GTX 295 1,792MB
  • ATI Radeon HD 5970 2GB
  • ATI Radeon HD 5850 1GB
  • ATI Radeon HD 5870 1GB
  • Nvidia GeForce GTX 285 1GB
  • ATI Radeon HD 4870 X2 2GB
    • 20
    • 0
    • 35
    • 0
    • 44
    • 43
    • 48
    • 47
    • 49
    • 0
    • 50
    • 0
    • 51
    • 0
    • 60
    • 62
0
10
20
30
40
50
60
delta T (°C) (lower is better)
  • GPU 1 Delta T in °C
  • GPU 2 Delta T in °C

For analysis of these results, please read the Results Analysis page.
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