Quote from: Tornate on May 10, 2013, 12:11:13 AM

Quote from: JimmyFL on May 04, 2013, 10:07:22 AM

Quote from: BBQKorv on April 14, 2013, 01:24:13 PM

My completely headless miner does 740khs on all cards. Gigabyte Windforce 3 OC 7970 (GV-R797OC-3GD) rev 2.1 volt locked cards here @ 1060/1460.

cgminer 2.11.4 --scrypt --lookup-gap 2 -I 13 -w 256 -g 2 --thread-concurrency 8192
Catalyst 13.1

Yeah! the same here (750@1080/1500). Love this card!!!

Using the same GV-R797OC-3GD and can't get higher than 550 kh/s... Sad

Have tried more than 100 combinations with Memory and Engine clocks, still nothing Sad

I have also tried to remove .bin files from cgminer directory to make cgminer recompile kernel with default clocks.. Still nothing, that shit sucks.

config is:

Quote

"intensity" : "13",
"worksize" : "256",
"gpu-threads" : "2",
"shaders" : "2048",
"kernel" : "scrypt",
"thread-concurrency" : "8192",
"gpu-engine" : "1080",
"gpu-memclock" : "1500",
"scrypt" : true

Copied this post from the Consolidated Litecoin Mining Guide for 5xxx, 6xxx, and 7xxx GPUs thread:

Quote from: FullLife on March 26, 2013, 02:58:24 AM

So after reading through this whole thead, I thought I'd contribute my setup and config.

Rig:
i3-3225
Gigabyte G1.Sniper 3 mobo (in hindsight, I should have bought a different board, this one is overkill)
8GB DDR3
(4) Gigabyte 7970s link (in hindsight, I should have bought either vanilla 7970s or 7950s, these are not worth the extra $$)
1200W Coolermaster Silent Pro Gold ps (I can't say enough about this power supply, it's excellent)
250GB Samsung 840 SSD
(2) WD hard drives (500GB, 2TB)
Windows 7 Ultimate SP1 64-bit

Setup:
So I had all 4 cards running in my case, but with them being all crammed together, it was way too hot. So I pulled everything out and sat it on a rack. I have 2 of the cards plugged into the board, a 3rd card plugged in via 16x riser cable, but couldn't get the 4th card to work with another 16x riser cable. So, I ordered a 1x to 16x riser cable and hopefully this will solve my problem.

In the meantime, I'm running 3 cards and getting pretty nice hashrates. These are my settings and results using cgminer 2.11.3 and AMD Catalyst 13.1 drivers:

--intensity 13 -g 2 715/710 = ~1500Kh/s
--intensity 13 -g 2 925/1000 = ~1950Kh/s
--intensity 13 -g 2 1000/1206 = ~2100Kh/s
--intensity 13 -g 2 1022/1244 = ~2150Kh/s

Other settings:
--thread-concurrency 8192 -w 256

I've literally spent most of a entire week playing around with settings and trying to find the sweet spot and I feel like I'm pretty much there. As you can see, I actually underclocked my cards to get these hashrates. Stock clocks are 1100 core/1500 memory. Unfortunately the default voltage is about 1.2 volts on my cards and its locked (@#&($$^(@&$!!), otherwise, I'd be able to save 100-150W easily by undervolting.

I'm seriously thinking about getting rid of these cards and getting 7950s or 7970s that don't have the voltage locked. Having the voltage locked is such a huge drawback, I'm just wasting too much power right now.