After clarifying with
andrewb at SPCR that his figures exclude drives, I think we are getting somewhere on the power front. As he wasnt able to really load the board, i did a few more tests this afternoon.
You can see that the difference between idle and max CPU is 4W, conincidentally the TDP of each CPU core. However ramping up the MCH with AtiTool at 15 frames a min, added a further 6.5W.
Some pics of the meter readings at bottom.
One thing to note is the saggy 12v input from the plugpack, which flows through into the 12v rail.
The HDD used has the following specs according to:
http://209.85.173.104/search?q=cache...esturn+digital
5 VDC
Read/Write 500 mA
Idle 400 mA
Standby 45 mA
Sleep 38 mA
I found this exercise interesting for a number of reasons. With the D201gly2 board, and any other sinlge core baord i suppose it doesnt take much to 100% the CPU, a simple winrar will do it. However D945GCLF2 needs more work to get there.
One winrar (156MB psd) on d201 takes 2m33s, whereas d945 takes 2m13s.
On D945 two simultaneous rars of same file takes 2m43s.
This is quite cool. If your multitasking, thats nearing twice as fast.
On D201 a single instance of prime95 would 100% the cpu. With D945 it took 4 instances to finally get there. Kinda strange really.
Heres the screenshots.
2 x prime 95
4 x prime95
4 x prime95 (blend mode, ram intensive)

Whats up here?, same problem as the photoshop resample. Looks like RAM is the (or RAM I/O) bottleneck on this system...
AtiTool
3 x prime95+AtiTool
Idle
And the meter readings:
4 x prime95
AtiTool
3 x prime95 +AtiTool
Idle
S3
Off
What does all that mean? Well Andrewb's data indicates that at idle the board draws 2.7 Amps on the 5V rail, (he stated that 2.8 was an average, with 2.7A being the lowest reading). Without measuring it i think we can safely add a further 1.3A to that for MCH/graphics loading, which Andrew didnt do.
The moral of the story is that when at idle the board and one notebook drive draws 20.0 Watts, and under full load, 30.0 Watts. Just for the board itself 12v rail needs are minimal, and 5v rail needs start at:
MoB idle 2.7A
Add Load 1.3A
HDD 0.5A
----------
MIN 4.5A
Add a reasonable say 1A for USB devices and/or optical, which gives a reasonable working allowance of 5.5A at 5V. However if you want a MAX max:
then add 6 USB devices at 0.5A, plus 1A for optical, for a total of:
MoB 2.7A idle
Load 1.3 A
USB 3A
Opt 1A
HDD 0.5A
----------
MAX 8.5A
Edit: Some slim opticals can draw up to 2A at 5v.
Its pretty unlikely youll need all that power at once, but if you want safe thats it. Me ill go with the 5A figure and thus the sh-6080 DC-DC boards in these mini-itx cases *squeak* in.
Edit: Wrong. My original 6A rated at 5v PSU board died after one week. See, post a page or tow forward. You will need a PSU capable of at least 8amps on 5v rail.
The BB screenshot images arent that clear, so if you want the fullsize views use these:
$ttp://pl.net/~pscott/o/excell.gif
$ttp://pl.net/~pscott/o/rar.gif
$ttp://pl.net/~pscott/o/2xrar.gif
$ttp://pl.net/~pscott/o/2xp95.gif
$ttp://pl.net/~pscott/o/4xp95.gif
$ttp://pl.net/~pscott/o/4xp95_blend.gif
$ttp://pl.net/~pscott/o/ati.gif
$ttp://pl.net/~pscott/o/3p95+ati.gif
$ttp://pl.net/~pscott/o/idle.gif