what factors determine efficiency??? it would appear that im losing about 7/8%? is it a function of difficulty vs Thread concurrency?

im running 2 radeon R9 270s right now with a TC of 18400 and a difficulty of 19.  combined hash rate of about 750 right now according to scryptguild.

thanks!

My current TC value is 18400 (wouldn't) run at 2000+, and im only getting about 400kh. I cant get it to run on the presets at all. I would think running 2x270x's that I would be getting around 450-500kh each. but at least im up and running now...

what would be a good TC value? how would one determine an optimal TC??

tried changing the settings as instructed and still get nothing. Im also getting the error "unexpected command line arguments". Does it matter where I install guiminer? I currently have it on my desktop. should it be in program files? Ive had my cards running on bitminter, so I know they work. Im running out of things to try.

Thanks again or taking the time to help me!

im not getting anything over here...I click start and it says starting but never goes any further.

i blanked out usernames. but I coppied my worker name directly from the site and an positive the password is right.

Any ideas?

http://i.imgur.com/lROSpVf.jpg

I just got my rig put together, and when I go to start GUIminer, nothing happens. It says starting, but does not actually start. Im pretty sure I have my drivers up to date. Im running windows 7. any Ideas???

Thanks in advance for all of the help!

http://i.imgur.com/lROSpVf.jpg

When I go to start my workers, nothing happened. It says "starting" or "Connecting", but never actually connects. I copied the host straight from the site as well as the other required information to make sure everything was a mirror image.

Any Ideas?


running two  R9 270x's