lower gpu util in linux

[hoze]

and here is log from linux too:

root@xxxxx:~/xxx/oclHashcat-plus-0.12# sh wpa2.sh
oclHashcat-plus v0.12 by atom starting...

Hashes: 1 total, 1 unique salts, 1 unique digests
Bitmaps: 8 bits, 256 entries, 0x000000ff mask, 1024 bytes
Workload: 16 loops, 8 accel
Watchdog: Temperature abort trigger set to 90c
Watchdog: Temperature retain trigger set to 80c
Device #1: Tahiti, 2048MB, 1150Mhz, 32MCU
Device #1: Kernel ./kernels/4098/m2500.Tahiti_938.2_CAL 1.4.1741 (VM).kernel (1399164 bytes)

[s]tatus [p]ause [r]esume [b]ypass [q]uit => s
Session.Name...: sess-xxxxx
Status.........: Running
Input.Mode.....: Mask (?d?d?d?d?d?d?d?d?d)
Hash.Target....: xxxxx (xx:xx:xx:xx:xx:xx <-> xx:xx:xx:xx:xx:xx)
Hash.Type......: WPA/WPA2
Time.Started...: Wed Jan 25 21:33:25 2012 (1 min, 10 secs)
Time.Estimated.: Thu Jan 26 00:10:38 2012 (2 hours, 36 mins)
Speed.GPU.#1...: 108.0k/s
Recovered......: 0/1 Digests, 0/1 Salts
Progress.......: 7553024/1000000000 (0.76%)
Rejected.......: 0/7553024 (0.00%)
HWMon.GPU.#1...: 91% Util, 59c Temp, 70% Fan
[s]tatus [p]ause [r]esume [b]ypass [q]uit =>


....so as you can see in linux HWMon.GPU.#1...: 91% Util only, but with same configration,same commands etc HWMon.GPU.#1...: 99% Util !

Maybe some advice ??