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How Many Watts at 100% Does your I5/I7 Use? - Page 2

post #11 of 30
152W Xeon W3520 4.2GHz @ 1.275Vcore
post #12 of 30
Mine says 143 watts at 4.0 Ghz, I also have all power saving features off and run it constantly at 4.0.
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post #13 of 30
HWmonitor can very bugging so I really wouldnt trust its readings but if you wanna know an accurate way to see how many watts your using this is what you want http://www.meritline.com/p3-internat...q_v=fb3f07444b
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post #14 of 30
Quote:
Originally Posted by ljason8eg View Post
Lol how are you guys measuring this? An i7 at 4.0Ghz is going to be around 200w under a full load.

Those programs are measuring TDP, as was mentioned. TDP is for stock speed and voltage, goes totally out the window when its overclocked.
Recent versions of HWMonitor and Everest read the reported current draw and multiplier that by the CPU voltage.

They aren't showing stock TDP.

They don't take into acount VRM efficiency or other losses, but for the power/heat actually going through the CPU itself, it seem fairly accurate to be honest.

I'm maxing out at 166w at 4.2GHz core, 3.8GHz uncore, HT enabled, 1.28v, ~88C core temps.

Quote:
Originally Posted by Staged1 View Post
T I thought it weird that a (42%) overclocked i7-920 would draw only 110 watts (according to HWM) while Intel states a 130 TDP (I ASSUME stock speeds).
TDP is thermal design power. At full load a stock i7 920 isn't usually going to consume anywhere near that.
post #15 of 30
The ASP0800 chip is ASUS specific.

Mine does 200W @ 3.8 with vcore 1.3 under LinX.

Update: Does 155W @ 3.5 with vcore 1.219 under Linx.
Edited by leppie - 2/11/10 at 11:03am
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post #16 of 30
I have a kill-a-watt

Idle's at 155w
Load at 320w
hwmonitor says idle is 13.01w

So let's figure my cpu pulls over 165w under load.
Edited by MRHANDS - 2/11/10 at 10:14am
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post #17 of 30
Quote:
Originally Posted by MRHANDS View Post
I have a kill-a-watt

Idle's at 155w
Load at 320w
hwmonitor says idle is 13.01w

So let's figure my cpu pulls over 165w under load.
thats your whole system's power draw, and you have to take inefficiency into account. only way to know what the cpu power is to measure the voltage and the current draw of the cpu at the vrm level, and of course take into account any inefficiency. a crude guesstimate of the heat output can be achieved by taking a cooler's max dissipation.

Lets take a true 120, it has 6 heatpipes each rated at 38w, so its max is 228w. When you are approaching that load, the heatpipes lose their heat carrying capacity, and the temps get out of control (cpu throttles). I've never reached that stage with my current 920 as I didn't push it on air, but with my c0 it happened when I tried running 4.1ghz and 1.45 vcore, meaning the cpu was putting out over 200w of heat.
Edited by cky2k6 - 2/11/10 at 11:27am
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post #18 of 30
Thread Starter 
Thanks for the replies.

So, I'm overclocked at 3.8 GHz with 1.1625 vcore. Hardware monitor tells me I'm using 112 watts (drawing 48.75 amps at load). I know these are not accurate/absolute figures, but check this out...

I overclocked today to 4.009GHz with a 'somewhat stable' 1.225 vcore. After 4 passes of LinX (hence the 'somewhat stable' label), HW was reading over 155 watts (I wish I wrote down the amps).

No matter how accurate the actual power figures, 200MHz (a performance increase of 5.3%) drew an additional 35% power (according to HM)
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post #19 of 30
Today i measured the total that my system pulls from the wall and it was 416w with oc'd i7 and everything that is in my sig. So yeah i think the 700w psu's are way overrated. I ran Intel burn test and some MSI afterburner kombustor prog that stresses the gpu.
post #20 of 30
Mine claims 109.03W I ran Prime95 as well.
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