macker0407
Registered: Aug 12, 2008
Posts: 257
 
A day late, but some power measurements. This is using a simple Kill-A-Watt type device, so accuracy is +/- 5%. All readings are AC draw, actual DC draw will be lower but I've not got a reliable way to measure the (in)efficiency of the PSU.

1W - powered off, front LED's lit and NIC active
24W - idling in the BIOS
22W - idle at a Linux command prompt, 1.3Ghz
21W - idle at a Linux command prompt, 800Mhz(using the powersave governor)
30W - 2x burnK7, 1.3Ghz
25W - 2x burnK7, 800Mhz
27W - memtest86+ 4.00

All readings are with the boot drive connected to the onboard SATA port, but powered using a separate supply. So the readings are purely for the motherboard, CPU and memory.

With 4 Samsung HD103SJ's(1TB, 7200rpm, 32MB) and a single Seagate VB0160EAVEQ(160GB, 7200rpm, 8MB), peak power usage of 65W was hit by writing to all 5 drives at the same time and running a single instance of burnK7.

Some additional notes: the 5th onboard SATA port is actually connected via the ATI PATA controller(and uses the atiixp driver under Linux). I'm not sure if there's a bridge chip involved, but it doesn't seem to impact throughput much.

I did some additional throughput tests, using 4 60GB OCZ Vertex 2(SF based), and got an aggregate throughput of 572MB/sec write, 768MB/sec read which largely confirms the NB<->SB link isn't neutered in comparison to the desktop chipsets.

AHCI vs atiixp controller, the rates are 147/198MB/s(AHCI) and 144/186MB/s(atiixp) for a single SSD, for write and read.

The PSU itself is a Delta DPS-200PB-177A, rev 01F. According to the sticker, the rails support:

3.3V - 6A
5VSB - 2A
5V - 12A
12V - 13A

5V+3.3V max 60W
5V+3.3V+12V max 190W

Input voltage is 110-240V, ~3.5A.

The 120mm fan is also a Delta, specifically a AFB1212VH, rated as 12V/0.60A.

I think that about covers all the questions. If I've missed something, you'll have to ask again.