Quote from: whocares on March 24, 2014, 09:28:37 PM

Quote from: goin2mars on March 23, 2014, 05:46:49 PM

Quote from: boubou on March 23, 2014, 09:04:55 AM

Could I have opinion of specialist about my Problem? I suspect a bug of the programm because that'is the only thing I had not check, someone can tell me if it's possible?

I offer on the other topic 30 Darkcoin Bounty to solve that problem, a nobody has a clue, but I get in touch with other that had the same problem.

Here is the facts:
I have 3 different R9 290, other people has 6 290 of other brand, after 10 minutes, the cards looses 10% of Hash.
That probelm happend only on R9 290 cars.
I'm on Bamt 1.6 from Bajawa, He is on windows 7, same problem.
All 290 on the same rig experiment the loss in the exact same second
if you put another card in the rigg that is not a 290, all the 290 had a loss, but not the other card
The cards are cold.
The problem happenedonly with sph-darkcoin miner, if I mine Litecoin, I'm stable.
I split the cards with 2 PSU, does not change a thing, cards crashed at the same time, no matter what psu they are plugged.
I change motherboard, does not change a thing.
I run 4 different sgminer, each one with one card activated: even I did launch them with a delay of 3 minutes, 10 minutes later, all the instance with a 290 had a 10% lossat the same time
I launched sgminer without a .conf: only intensity in the parameters: happened with I:18 and I:21 (0% rejected, cards should worked with high intensity)
Once I got the loss only a cold reboot can recover the missing hash. If I mine restart only the miner, it restart but is capped to 90% of max hashrate.

I'm getting out of hints. If the problem is in the programm, I shoud stop wasting my time. If it is not, I will keep investigate, even if I think I already get pretty far.
PS: as usual, english is not my first languagae, so if I offensed any-one, it was not intended. Wink

Bumping this question, and adding my details. I have the same problem.

It's across 5 computers, all different motherboards. Running 10 cards, all 290s. 7 reference asus . . mix of hynix and elpida. 3 nonref asus . . all elpida. 3 bronze psu's, 1 silver and 1 platinum. All on win 7 64 bit. Fresh installs all of them. I use the comps for other things . . that's why there's only 2 in each comp.

Anyways, the hashes and cards are completely stable except for this drop in hashrate.

It starts at 2.4M#, and drops to 2.0M# (running at stock clocks for the gpu's) after a certain amount of time. Can't get these back unless restarting the computer. It will run at 2.0m# for a week straight . . so no stability issues.

I don't have this problem with other mining software . . so what could be causing it with this software?

Also, I'm throwing another 30 drk on top of boubou's bounty . . so you'll now get 60 drk for a successful fix for this.

I also have the same problem as above (BAMT 1.6).

I tried with the most simplest settings in my conf - w 256 i 18 g 2/4, but after ten minutes considered that my hash rate was dropped by 10%.
It appears only with sph-sgminer.

I assume you also have R9 290?

Comme on, it's a 60 Darkcoin bounty and some other guy propose to put Darkcoin in the pot too.