Is that true for all i7/i5/i3?
Sandy Bridge and Haswell CPUs under windows with powersaving enable allow the cpus to idle to 800mhz, on ivy bridge is 1600mhz, but the consupmtions are still similar... not all but close, the trick is chosing a good motherboard and efficient PSU. I'll leave you some examples where you can draw you own conclusions,DH77DF vs DH77EB - power consumption
I've build the mini pc with these components:Optimal Haswell CPU for low idle power HTPC/Server
Ram: 2x4GB Corsair Vengeance Low Profile White, 1.35V @1600Mhz 9-9-9-24
SSD: Plextor M3 128GB
Power supply: MeanWell GS90A12-P1M + pico psu 90-XLP
Fan: Intel stock fan + Arctic Cooling F8-PWM on the case.
OS: windows 7 ultimate x64
I've disabled the Turbo mode of the core I5 to limit the maximum power consumption under load and I've activated all the C-states. I've also set the power policy in the bios on low power and I've checked in windows device manager the box that says "Allow the computer to turn off this device to save power" on the firewire controller.
I've measured a power consumption under load (with prime95 + furmark) of 72W (about 80W with the turbo activated).
The idle power consumption, when the fans are connected, is measured with the minimum allowed rotation speed (it's more than enough keep cool the system @idle). The minimum rotation speed of the stock intel fan is 1000rpm and the artic cooling fan is 350rpm. No keyboard nor mouse are connected during the tests.
Here the results:
With gigabit connected, video output enabled, fan processor connected, fan case connected:
With gigabit connected, no video output, fan processor connected, fan case connected:
With gigabit connected, no video output, fan processor connected, fan case disconnected:
With gigabit connected, no video output, fan processor disconnected, fan case disconnected:
Ok, Intel DH87RL seams very promising, right now out of stock everywhere here.
Dose the G3220 support Deep Sleep S4/S5 or C6/C7 power states as the i3 do?
Article: 10w idle, Core i5-4570, Intel DH87RL
Link w Google Translator: http://translate.google.com/translate?h
Discussion forum, but I cant get the Google translator to work properly, I only see
the first post, not the answers http://www.heise.de/forum/c-t/Kommentar ... rum-31487/
7.5w idle, Intel Pentium G3220, Asrock H87M-ITX post 1968:http://translate.google.com/translate?s
Both of the above setups are quad cores, try if you can to go with an Intel motherboard + PicoPSU 90XLP (very hard to get now a days) + a level 5 efficient brick.