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Interesting discovery

post #1 of 10
Thread Starter 
So, I bought a meter to plug my system into as it plugs into the wall to show me the WATTS used. I started Prime and Kombuster on my sig rig, using everything to it's max, and it only showed 350W.

So, does that mean my 800W psu is total overkill? The CPU and cards are overclocked, and I'm running to HDD's in RAID.

I knew the 5770's were efficient, but damn.
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The Mistress
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2TB (2x 1TB Seagate 7200 RAID0) Blu-Ray Win7 x64 Acer 24" 1080p 
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Corsair GS800 Phantom NZXT 
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post #2 of 10
Yeah, the 800 watt PSU is a bit much, but think of it as insurance. You aren't stressing it as bad as you would a 500 watt or so, and it gives you room to upgrade.
 
Da Bestest Juju
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Da Bestest Juju
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post #3 of 10
Yes it is, CrossFire 5770s are confirmed to work on a quality 500W and can probably run on less.

Combination of software I've found makes the maximum amount of power draw is Intel Burn Test and Furmark. Adding HDTune actually makes wattage go down a little, since it's drawing CPU cycles from IBT.
post #4 of 10
Thread Starter 
Wow, thanks for the link your sig, tons of good info, makes me wanna return the PSU and get a nice 500, lol
The Mistress
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CPUMotherboardGraphicsRAM
i5-760 3.8GHz on Air EVGA p55 SLI CF 2x Sapphire HD 5770 4GB G.Skill RipJaws 1600 
Hard DriveOptical DriveOSMonitor
2TB (2x 1TB Seagate 7200 RAID0) Blu-Ray Win7 x64 Acer 24" 1080p 
PowerCase
Corsair GS800 Phantom NZXT 
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The Mistress
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CPUMotherboardGraphicsRAM
i5-760 3.8GHz on Air EVGA p55 SLI CF 2x Sapphire HD 5770 4GB G.Skill RipJaws 1600 
Hard DriveOptical DriveOSMonitor
2TB (2x 1TB Seagate 7200 RAID0) Blu-Ray Win7 x64 Acer 24" 1080p 
PowerCase
Corsair GS800 Phantom NZXT 
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post #5 of 10
my 6870 crossfire and 1090T both overclocked with tons of lights and fans barely goes up to 500w reading via my meter as well. I was really surprised also with this reading. I've always thought that my rig is almost maxing out my 850w PSU. didnt know I was so wrong hehe

gotta give credit to amd/ati on this one. they make really power efficient yet very powerful cards
Edited by jprovido - 1/30/11 at 8:41pm
post #6 of 10
Quote:
Originally Posted by Phaedrus2129 View Post
Yes it is, CrossFire 5770s are confirmed to work on a quality 500W and can probably run on less.

Combination of software I've found makes the maximum amount of power draw is Intel Burn Test and Furmark. Adding HDTune actually makes wattage go down a little, since it's drawing CPU cycles from IBT.
I've run Crossfire 5760s and a Q6600 on an S12II 430B. They use roughly the same amount of power.
 
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ThinkPad W510
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The Arkbird
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Optical DriveCoolingOSMonitor
Tray-load DVD Factory Windows 7 Pro 1080P "Ultrasharp" panel 
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Integrated Big 'ol brick M4700 chassis 
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i7 820QM 4318-CTO Quadro FX 880M 4x4gb 
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X-25M G2 DVD Stock Arch x64 
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1080P touch screen IPS Clicky Brick Adapter UltraNav 
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4x Xeon E7440s HP DL580 G3 Motherboard Rev. 1.1 ATi Rage XL Samsung ECC DDR2 
Hard DriveOptical DriveCoolingOS
15K HP Ultra320 SCSI DVD Burner Bare Heatsinks + Chassis Airflow The Ever-Changing Distro... 
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post #7 of 10
Quote:
Originally Posted by 8ight View Post
I've run Crossfire 5760s and a Q6600 on an S12II 430B. They use roughly the same amount of power.
5760s or 5670s?
post #8 of 10
Keep the psu and get 3 more 5770's and applicable board
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Ultra mega
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post #9 of 10
Just get a third 5770 and let that PSU do some more work! 5770s seem to scale really well even in tri fire.
Ummm....
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Ummm....
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post #10 of 10
Keep in mind that your reading on the meter is a higher number than your rig is pulling from DC power.

Simply multiplying by the efficiency for your unit by the reading should give you the accurate DC (supplied) load..
Waiting on X399
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Waiting on X399
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