first of all a big thanks to armodar for the guide. all the settings worked a treat with my 6870.

I don't have a dedicated mining rig, so I played around with the settings that would give me a decent khash rate while watching videos.

The following seems to give me the best hash rate (~190) while not affecting the video playback quality:
Intensity 11 
thread concurrency 6720
worksize 64
memory 900 mHz

I will do some more testing to see if I can push the rate up to ~250.


I seem have the same problem. mine is doesn't seem to change from 920. I've set auto-gpu and gpu-engine 900-1000 and it still stays at 920.

but bitcz can't because bitcz is new here... right?

hello,

as far as i know, you don't need powered pcie risers, if your mobo has additional molex connection points to provide extra power to the pcie lanes.

i'm not sure exactly how your mobo's power rail is set up, but i'd say the mobo was designed to run sli/crossfire and the 2 molex connectors are to power 2 cards in that configuration.

so you could probably get away with 2 powered risers and 2 unpowered risers.
you'll need powered risers for the cards you're going to be connecting to the non 16x lanes.

this might also be of some use:
http://www.gobitgo.com/articles/1001/How-To-Correctly-Use-and-Install-PCI-E-Riser-Cables/ 

DOH!!!

Fail on my part. I only saw this forum after I signed up today .

Cheers.

here's my referral link:

http://litecoinkamikaze.com/ref/85814

cheers!