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Real world power consumption measurements from triple 7970's

post #1 of 4
Thread Starter 
Hi,
Now my water cooled rig is up running and stable, I thought I would offer some info I have recorded thats kind of interesting.

During benching and gaming, I have been creating a spreadsheet of everything I do and that includes power draw at the mains outlet. I was very surprised to find that most games dont stress the PSU anything like benchmarking. I thought the figures would be much closer.

The Test Rig: (For power consumption reference)
  • ASUS Maximus IV Extreme-Z
  • i7 2600K @ Std settings
  • 3x AMD 7970HD in Tri-Fire @ std settings
  • 2x 240GB OCZ SSD's
  • 3x 1TB Velociraptors
  • Corsair Vengeance 8GB DDR3 @ 1866
  • XFX 1250W PSU
  • 1260 & 360 Radiators fed with D5 pump
  • A few lovely lights... lol


Results as follows:
(All settings maxed for each game, using eyefinity at 5760x1200)


Benchmarking:
  • 3D Mark 11 (Performance) – 880w
  • Heaven 2.5 – 898w
  • 3D Mark Vantage (Performance) – 906w
  • Furmark on 3 screens – 908w
  • Aida 64 stability test - 1092w

Gaming:
  • Mass Effect 3 - 565w
  • Shift 2 unleashed – 570w
  • Syndicate – 580w
  • Skyrim – 620w
  • Hawx 2 – 641w
  • Alan wake – 720w
  • Crysis 2 – 780w

There is little point to this topic, other than to show that during gaming, your PSU may not be quite as stressed as you think. Its during benchmarking that you need the extra watts for synthetic loads.

Please Note:
These figures were taken with everything at standard clocks so its a valid benchmark. Overclocking will increase the current required.
Edited by Stu-Crossfire - 3/23/12 at 3:33am
post #2 of 4
Thread Starter 
Little update for you as it may be of use to someone...

The XFX 1250W pro that advertises itself as single rail and makes a huge song and dance about it is in fact NOT! Its Multi rail... They blatently LIE!

After being annoyed for a year with random shutdowns, I discovered this with a little help from a chap here on OCN and he sent me some links where it is dissasembled and proved, so after a bit of reconfiguring of my rail distribution I solved the problem, but I am still pretty damn annoyed!

Anyway... Pushed the system further now and got the following peak readings when benching 3DMark Fire Strike. (Now on a 3770K)

1GPU -


2x GPU -


3x GPU -


Remember - these figures are at the wall and dont take into account the PSu conversion efficiency... but its still time for me to upgrade.
Max Revo time. smile.gif
post #3 of 4

Thank you for posting this. I get so sick of people saying of you only need a blank psu for that gpu. Well, you need a lot of power at times.

 

Would you mind doing a IBT + Furmark power consumption and posting that here: http://www.overclock.net/t/1126863/real-world-power-usage-user-submitted-values/0_30 ?


Edited by nvidiaftw12 - 8/13/13 at 10:13am
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2nd Rig
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CPUMotherboardGraphicsRAM
[Intel] 2500k [4.5ghz] [1.3 volts] [AsRock] P67 Extreme 6 [Sapphire] 6950 Toxic (@ Stock) [Samsung] Low voltage memory [@1866 mHz 9-9-9-24] 
Hard DriveOptical DriveCoolingOS
[Corsair] 120gb Force GT Some Lite-On thing [Coolermaster] v8 Winders 
MonitorKeyboardPowerCase
[Gateway] FDH2402 [Microsoft] Sidewinder x6 [XFX] Core Edition PRO850W [In Win] Dragon Rider 
MouseAudioAudioAudio
[CM Storm] Sentinel Advance II [AUDIOTRAK] Prodigy HD2 ADVANCE DE [Polk Audio] PSW 505 and Monitor 40's Denon AVR-791 
Audio
Infinity P153's 
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post #4 of 4
Nice work Stu. Are you going to do a follow up overclocked?


Btw, don't use flash while taking the pics. Use a flashlight instead pointed off center. You'll get much more legible pics that way.
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