Laptop power usage estimate

[Devryd]

Hi 
I was wondering, if someone could give me an estimate on how much power my laptop uses. I dont have a powermeter right now and there are some sensors missing, so I dont know, for excample, how much power my gpu draws. 
I wanna try powering the lapop using solar power, so its not bad, if the estimate is a little higher. 
The laptop uses an SSD, i7 2760qm without an IGPU, a gt540m, 16gb of ddr3 RAM and a 15"(?) 1080p screen. Its running with a custom loop for cooling
Does anyone have an idea, what kind of power such a laptop will draw?
As far as I know, the CPU draws up to 45W, but i cant fight something for the GPU. For the rest, I have no idea.

 

The laptop is a sony vaio cpvf24m1e, but I couldnt find anything online.

 

Greetings devryd
 

[Bombastinator]

20 minutes ago, Devryd said:

Hi 
I was wondering, if someone could give me an estimate on how much power my laptop uses. I dont have a powermeter right now and there are some sensors missing, so I dont know, for excample, how much power my gpu draws. 
I wanna try powering the lapop using solar power, so its not bad, if the estimate is a little higher. 
The laptop uses an SSD, i7 2760qm without an IGPU, a gt540m, 16gb of ddr3 RAM and a 15"(?) 1080p screen. Its running with a custom loop for cooling
Does anyone have an idea, what kind of power such a laptop will draw?
As far as I know, the CPU draws up to 45W, but i cant fight something for the GPU. For the rest, I have no idea.

 

The laptop is a sony vaio cpvf24m1e, but I couldnt find anything online.

 

Greetings devryd
 

If you want a maximum estimate, look at the wattage on the power brick.  It CANT draw more power than that.  It will likely draw less. How much less varies a great deal by what you use the machine for though there will probably also be some sort of minimum as well.

[Devryd]

The brick is rated for 19.2V and 6A i think. That would be nearly 120W. Thanks for the estimate, but I really hope, its less 

[Bombastinator]

12 minutes ago, Devryd said:

The brick is rated for 19.2V and 6A i think. That would be nearly 120W. Thanks for the estimate, but I really hope, its less 

Part of the issue is there’s transient power levels and average power levels.  The average may not be that high, but that doesn’t apply to transient.  You’ll need to allow for the capacity for the thing to draw that much at least sometimes.  Laptops have a battery which could be used to buffer that somewhat.  It would have to be in the circuit though, and apparently a lot of laptops get faster on wall power implying the battery is cut out of the circuit in some way.