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Gaming PC Power Supplies

Sniper Ash6

Distinguished Member
Think you know your power supply requirements? Have a go at this then :)

A friend has tonight been playing with a plug in power meter to see what the computer he's playing with pulls from the wall. He's running a 990FX-UD7 with an AMD FX-8150, 16GB DDR3, 2x 6990s, one mechanical HDD and a 1200W 80%+ gold PSU

His first test was running BF3 on ultra with everything at stock. What do you think he saw the meter peak at?

He then OCed the CPU to 4.4GHz with 1.5Vcore and ran Furmark's burn test along with Superpi 32M. Again, what do you think he saw it peak at?

Finally, with the CPU still OCed but just sat idle on the Win 7 desktop (all power saving features off) what do you think he saw the meter read as the peak draw?

Unfortunately I don't have pics of the results but do know them so will reveal them after a few days of guessing. I do reckon most will be surprised though.
 
The fact that you said surprised to me means lower than we would think so my guesses ate 575, 650 and 400.
 

Hillskill

Moderator/Games Reviewer
Rock N Roll way to see in the New Year :D
 

SparkShot

Well-known Member
i always run mine on a power meter for a few days at first just to check the power saving features are working on my system.

My current set up pulls around 280-350 when gaming and around 90w when idle.

i'm gonna says ash ash's mates rig pulls around 550-600w when stressed and 150w when idle.
 

Sniper Ash6

Distinguished Member

Sniper Ash6

Distinguished Member

DeanE

Distinguished Member
600, 700 and 350, maybe not in that order depending on what the results are :D
 

Sniper Ash6

Distinguished Member
I'll post the actual results later
 

alphaomega16

Distinguished Member

Sniper Ash6

Distinguished Member
Results:

Everything at stock was 520W
CPU OCed but GPUs still at stock pushed it up to 630W
The CPU still OCed but sat idle saw it sat at 234W

Remember that these are the peaks as well

While it does show that Bulldozer uses an incredible amount of power when overclocked, the whole thing doesn't add up to as much as most would think.
 

wolvers

Novice Member
Doesn't sound anywhere near high enough. :confused:

Are you sure he's getting 100% usage on all 4 GPUs? One 6990 pulls ~300W more than idle on it's own under full load so there should be ~600W from just the 6990s. Also, an overclocked 8150 should be adding ~350-400W to that under Prime. I'm only going on what the reviews says but something is surely not fully loaded somewhere?

Edit; in this review they pull ~900W in full GPU stress, no extra CPU stress.

http://www.guru3d.com/article/his-radeon-hd-6990-crossfire-review/9
 
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Sniper Ash6

Distinguished Member
That's what he measured. The first result was BF3 on Ultra at 1080p, the second was loading the CPU to 100% and running Furmark's burn test and the third was then idle.

We did both think them very low results compared to what you'd expect though
 

TheNameIsJambo

Well-known Member
That's what he measured. The first result was BF3 on Ultra at 1080p, the second was loading the CPU to 100% and running Furmark's burn test and the third was then idle.

We did both think them very low results compared to what you'd expect though
Hmm.. So does that mean Skyrim is an energy efficient game if it only allows 2 CPU cores (Lets say 50%) and 50% of your GPU to be engaged?

:thumbsup:
 

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