Hey,
I bought this box some while ago now and I'm pretty happy with it
Put in an 256GB mSATA SSD and a 1TB spindle drive.
CPU is a Haswell Pentium G3420. Using the cooler it came with.
I'm able to undervolt the CPU to 0.870V. With some additional tweaking this results at 30W maximum load @ Prime95 small FFT! The system stays pretty cool even then.
The BIOS offers fan control and the fan can be set to run very quiet @ 400RPM.
Really like the case design, looks a lot better in real life than on the product pictures IMHO. Build quality is quite good for this price. Comes with a 120W Delta Electronics Power Supply (Efficiency Class V).
It can go down to about 10W idle and C6 state being used. As the Pentium does not support C7, i'm pretty sure it will go even lower when using a i3+ CPU.
This is a really nice budget system. You can throw in some RAM and even a 30eur Celeron CPU and still have a quiet but potent Media Center/Server.
Some impressions:
watch gallery
A note about the BIOS:
They seem to have some 'optimized' BIOS version in the ProBox23. It comes with the MSI H81TI Motherboard, but the BIOS versioning scheme is a bit different from this:
http://www.msi.com/support/mb/H81TI.html#down-bios
The BIOS that comes with the ProBox23 does not offer any controls for DRAM or CPU voltage. I upgraded to version 10.3 using the Windows update utility (in-BIOS update did not work) and voila -- voltage control here you come! They probably did this since it's such a small case and they don't want people to overclock in it.
There also seems to be some kind of bug setting the voltages at anything but the default multiplier of the CPU. It seems to simply take the voltage that was set last @ default multiplier. E.g. underclocking to 2GHz with a multiplier of 20, it will ignore whatever manual voltage I set and take the last known voltage set at 32x multi (default). Using offset voltages did not work very well either, so I just lowered the VCore as much as possible at @ 3.2GHz and disabled SpeedStep / Turbo (which is not used anyway with the Pentium). At 0.870V and C6 states being used, this is still very power efficient.