Quote from: mrb on February 02, 2013, 11:42:12 PM

And FYI, FPGA board vendors don't talk about power consumption at the wall, but at the 12V level, after the AC/DC PSU.

BFL's FPGA power consumption figures are at the wall; you can get better-than-quoted power usage by using a more efficient PSU. As far as I know, the only vendors that measure power consumption at the 12V input are the ones which make you supply your own PSU. Icarus had both options and gave both power consumption stats:

Quote from: ngzhang on November 09, 2011, 05:29:57 PM

After months of work, finally I build a FPGA mining cluster using the board "Icarus".
each board has 2 XC6SLX150 -2FGG484I on it, generates a 380MH/s hashing power. 19.2W (full load working) / 3.4W (idle) power consuming (board input, without fan). here a detail spec table:

Technology: Spartan6 -LX150 -2I (or -3C)
speed (MH/s): 380
$: 569 (1) / 469$ (multiple of 30) (-5$ if you do not need the adapter, recommend for bulk orders, they are heavy)
W: 4.5 for idle / 21 for full load. (notice this is the on wall power, include the adapter losses and fan)

Also, all FPGA vendors which reported board-level power consumption did so for the whole board including power wasted in the onboard DC-DC converters, not the chip power usage as Avalon is doing. It's not like you can really unsolder the chips and put them in your own board with more efficient power circuitry, after all!