I got my new hashboard today. Thanks to bobsag3 from Minersource!
Now my X1 is running at nearly 100 GH/s with 1000 Hz:
cgminer version 4.4.2 - Started: [2014-09-29 17:42:24]
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(5s):101.8G (1m):98.90G (5m):98.18G (15m):79.34G (avg):99.28Gh/s
A:27648 R:3072 HW:11 WU:1386.4/m
Connected to stratum.nicehash.com diff 512 with stratum as user 1GUNx9KDSPmeuDoRqpWn6VLGHn
Block: 6b54fe9c... Diff:34.7G Started: [17:42:24] Best share: 55K
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[P]ool management [S]ettings [D]isplay options [Q]uit
0: MBA 0 : max60-80C Ch:1 Co:99 | 92.78G / 99.23Gh/s WU:1386.4/m