If people are not familiar with ZTEX FPGA modules 1.15x please have a look below.Quoted from https://bitcointalk.org/index.php?topic=49180.0Speed grade Typical frequencies Average hash rate Notes
-3 212 MHz to 220 MHz 215MH/s Estimation based on measurements with older Bitstreams
-N3 200 MHz to 212 MHz 205MH/s Estimation based on measurements with older Bitstreams
-N3 208 MHz to 224 MHz (!) 213MH/s Long time measurement with 15 FPGA boards
If the hash rate is less than stated above the cooling / heat sink installation should be revised.
Power dissipation (without the fan) at 210MHz is typically 9.4W. More details can be found on the project page (http://www.ztex.de/btcminer/
) and in the BTCMiner thread here in the forum (https://bitcointalk.org/index.php?topic=40047