power consumption of my x3360 (kill-a-watt)

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power consumption of my x3360 (kill-a-watt)

Post by graysky » Sat May 17, 2008 5:53 am

Got bored yesterday, so I ran checked out the power consumption of my X3360 system for shits and giggles with my kill-a-watt.

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Intel X3360 (C1 stepping) @ 8.5x400=3.40 GHz
 266/667 MHz Strap  CPU Vcc=1.12500
 NB Core=1.370      CPU VTT=1.310

DFI LT P35-TR2 (no modifications)

eVGA 8800 GTSG92 512 meg 
 (770/1,923/2,000 MHz : Core/Shader/Memory)

Corsair Dominator DDR2-1066 (TWIN2X4096-8500C5DF)
 2x 2Gb @ 5-5-5-15 (performance level 6) @ 1,000 MHz (4:5) @ 2.100V

Corsair HX620
2x HDs (seagates, one a 10th generation and the other an 11th)
4x120 mm Tricool fans (came with the p182 case) all on low
1x120 mm S-Flex SFF21F (1600 RPM) on the HS
1x40 mm silent fan on the NB
That's it... no other hardware (speakers, monitor, etc.) was in the loop.

Kill-a-Watt Readings
Idle in BIOS screens - 158 W
Idle in BIOS screens with both HDD's unplugged - 144 W

Idle (with speedstep active in XP x64) - 137 W
Load (prime95 v25.6 small FFT) - 213 W
Load (prime95 v25.6 large FFT) - 216 W
Load (prime95 v25.6 blend) - 210 W
Playing Crysis - 237-241 W
x264 encode - 197 W
Standby - 0 W

No real point to this post beyond just trivial information! It is interesting to me that the large FFTs consistently read 3-4 watts higher than the small ones did which is inline with the software's description of the large FFTs as generating the max heat/power consumption. Here is the similar analysis of my older Q6600-based system, but there are too many changes (MB, settings, video board, memory, etc.) for a "which processor is more power efficient" comparison.

What is little bit crazy is that both systems draw the same while idle, and even @ 3.4 GHz, and faster memory, the X3360-based system uses less wattage on p95.
http://encoding.n3.net <--- for all your DVD and audio CD backup needs!


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Re: power consumption of my x3360 (kill-a-watt)

Post by Methious » Mon May 19, 2008 9:31 am

I've run the Kill A Watt on my q6600 and X2 6400 I was surprised to find out that at idle they both took about the same, mid 170s range idle. Jumped to 273 on the Quad and and X2 6400 under load.

What I'm wondering is how does wall pull equate to PSU output.

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Re: power consumption of my x3360 (kill-a-watt)

Post by DMB2000uk » Mon May 19, 2008 11:02 am

If you know roughly how efficient your PSU is, you can guess based on the AC draw multiplied by the efficiency percentage.

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