How come my Win7 PC with 2 * R9 290 is able to mine only something like 14Kh/s?? I startted cgminer 3.7.2 with --scrypt- option, and the result is:


cgminer version 3.7.2 - Started: [2013-12-29 18:36:31]
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(5s):28.42K (avg):28.39Kh/s | A:0  R:993  HW:0  WU:23.1/m
ST: 2  SS: 0  NB: 1  LW: 126  GF: 0  RF: 0
Connected to p2pool.org diff 810 with stratum as user xxxyyyzzz
Block: 97d7c0f9...  Diff:2.85K  Started: [18:36:31]  Best share: 1.5K
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GPU 0:  73.0C 1122RPM | 14.23K/14.36Kh/s | A:0 R:993 HW:0 WU:10.4/m I: 8
GPU 1:  84.0C 1037RPM | 14.19K/14.29Kh/s | A:0 R:  0 HW:0 WU:12.8/m I: 8
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[2013-12-29 18:37:43] Stratum from pool 0 requested work restart
[2013-12-29 18:37:49] Pool 0 difficulty changed to 758.719441
[2013-12-29 18:37:49] Stratum from pool 0 requested work restart
[2013-12-29 18:38:13] Pool 0 difficulty changed to 930.541099
[2013-12-29 18:38:13] Stratum from pool 0 requested work restart
[2013-12-29 18:38:19] Pool 0 difficulty changed to 723.959473
[2013-12-29 18:38:19] Stratum from pool 0 requested work restart
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What could be the problem??