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100 Watts? That's crazy low. You might not even need any fan at that level.
I care about quiet, not necessarily power (obviously the two go together somewhat). For trading, these low end graphics adapters are all you need until we start making 3D indicators (hmmm, I am trademarking/patenting that). As another example, my system is overclockable, but I do not go there because I do not need to, but I did plan ahead in case I wanted to.
I have never measured total power. How do you do that (without breaking out the meters)?
My main CPU requirement are hardware virtualization features using Linux, which Intel has decided VT-d is not available on their highest end overclocked "K" CPUs. In other words, I can't perform "device/VGA pass-through" to a virtual machine so the device/GPU appears native to the virtualized OS. This really annoys me.
I know Intel has many followers, but personally I'm a fan of the direction AMD CPUs has been going: more cores for integer operations and moving floating point operations to GPUs using OpenCL. The new A10 quad-cores (for laptops/SFF) have the new Piledriver design and their higher end 8-core CPUs can overclock +4Ghz.
Considering most all new AMD GPUs blow the doors off Intel GPUs, these days I just don't see much value in the extra money spent on Intel when modern browsers are already implementing GPU optimizations and future software will do similar for extreme performance increases.
Ok, I got a P3 Kill A Watt, and am kind of blown away. It says my system (no monitors) is running at 68W idle and about 130W at load (all cores/threads 100%), and a peak of 170W. If this is true, then my monitors are probably pulling more power than my system at this point, which I was not expecting.
My three Dell 24'' monitors use about 15W each (brightness set to 120 cd/m2), the PC itself takes about 50 W (peaks around 100W), I did not measure it for some time now.
You must have nice new led monitors. My old 30 in Dells claim to use 147W each (I believe it, as I can feel the heat coming off all three of them). I'll measure those later, but have a new wish list item. I am not as concerned with the power bill as much as what I can get out of my UPS when I have a power failure.
BTW, remember that traditional UPS's tend to be wildly inefficient. You can plug in 100W to the UPS, and have the UPS pull 800W from the wall. There are "Green" UPS's which I've been slowly migrating to over the years. I have around 6 UPS's in my house, mostly older CyberPower 1400's, and have been switching them to Green models as I can - the newer PFC Sine Wave 1500's (CP1500PFCLCD).
