Miner is hashing to slow

[shootme]

Hey there,

Thank you for reading this, i hope my question aint stupid.

I got 10 gridseed miners and they are connect trough a powered usb-hub to a raspberry pi with scripta with cgminer 3.7.2.
The hashrate should be 300-330 Kh/S but it is only 255 Kh/S (stable though)


./cgminer --scrypt -o stratum+tcp://eu.clevermining.com:3333 -u <username> -p  --gridseed-options=baud=115200,freq=850

also i did change the miner-start.sh to:
sudo /usr/bin/screen -dmS cgminer /opt/minepeon/bin/cgminer --scrypt --no-submit-stale --gridseed-options=baud=115200,freq=850 -c /opt/minepeon/etc/miner.conf

Still this is my CGminer:

 [2014-03-26 19:46:41] GSD0                | (5s):255.4K (avg):255.3Kh/s | A:210432 R:7680 HW:1 WU:0.5/m
 [2014-03-26 19:46:41] GSD1                | (5s):255.4K (avg):255.3Kh/s | A:180736 R:9216 HW:0 WU:0.4/m
 [2014-03-26 19:46:41] GSD2                | (5s):255.4K (avg):255.3Kh/s | A:217088 R:10752 HW:1 WU:0.5/m
 [2014-03-26 19:46:41] GSD3                | (5s):255.4K (avg):255.3Kh/s | A:196608 R:10240 HW:1 WU:0.5/m
 [2014-03-26 19:46:41] GSD4                | (5s):255.4K (avg):255.3Kh/s | A:169984 R:6144 HW:0 WU:0.4/m
 [2014-03-26 19:46:41] GSD5                | (5s):255.4K (avg):255.3Kh/s | A:194048 R:7680 HW:1 WU:0.5/m
 [2014-03-26 19:46:41] GSD6                | (5s):255.4K (avg):255.3Kh/s | A:190464 R:10752 HW:2 WU:0.5/m
 [2014-03-26 19:46:41] GSD7                | (5s):255.4K (avg):255.3Kh/s | A:208384 R:8192 HW:1 WU:0.5/m
 [2014-03-26 19:46:41] GSD8                | (5s):255.4K (avg):255.3Kh/s | A:194048 R:7168 HW:0 WU:0.5/m
 [2014-03-26 19:46:41] GSD9                | (5s):255.4K (avg):255.3Kh/s | A:173056 R:9216 HW:1 WU:0.4/m

Even though i set the Freq. at 850, they hash at 600!

What can i do?

[shootme]

Fixed, thanks to darkfriend77


./cgminer --scrypt -o stratum+tcp://eu.clevermining.com:3333 -u <username> -p *** --gridseed-options=baud=115200,freq=850,chips=5 --hotplug 0

Did the trick.