my new GPU 7870 is only getting 409 khash/s?? pls help

[bjornnl]

hi i got an new ati hd7870. i got the following problem when i press start mining it goes to about 400 Mhash/s then after a couple of minute is goes to 409 khash/s what is wrong? im using guiminer and deepbit pool.

thank bjorn Netherlands

[1715112641]

1715112641

[1715112641]

1715112641

[lookingforphone]

GPU mining is obsolete or about to be. Why are you going into mining with GPU now?

[bjornnl]

my computer runs day and night, anyway the only thing i was not using was the gpu, and i wanted a new card anyway 

[lookingforphone]

my computer runs day and night, anyway the only thing i was not using was the gpu, and i wanted a new card anyway 

That makes sense, just watch out with the electric bill. Having the GPU idle or at 99% makes a big difference on how much it consumes. Make the numbers and be sure you are making more money than you are paying.

[mothership]

I have the same problem when using guiminer with deepbit and a 7870.

cgminer works fine though - averaging 415 Mh/s