I have now fixed the groestl speedup 2 on github. Klaus_t has been optimizing quark, so I am waiting for a pull request, and then build release 31.
SP_ BUILD v30a/b --
Version 30b is faster yet. Both my rigs see an increase of about 1200-1300kh/s mining quark. This difference is from v29 to v30b.
However, in the long-haul, 24hrs or so, build 30a/b is not stable on my slower rig. Again, it is crashing.
I hope v31 comes soon, and with smooth running code. My fast rig is now at 37.5mh/s, my slow rig at 36.2mh/s, and my fastest 750ti is at 6340kh/s (quark). --scryptr
EDIT: I've reverted my slower rig to v29 after a third crash. --scryptr
If you're getting that on even your slow rig I'm guessing you're overclocking them too much. My 6xEVGA FTW cards can't be OC'd more than 10mhz over stock OC without crashing eventually and it's been that way since the beginning. They get 36.55mh so I think you're pushing them too much. I clocked the memory to -150 since it really has no effect on a lot of algos besides wasting power. Try dropping mem clocks to stock maybe?
My slow rig of Gigabyte 750ti's only get 33mh and it's a clone of the other rig with an even better i3 cpu, so I'm not sure why your numbers are quite a bit more than mine besides maybe OC. Haven't tried much OC on the Gigabyte on quark yet. I left it at +25mhz core and 100mhz memory I think since too high and other algos have a problem when it autoswitches to them. Rather have them work consistently 24hrs than have one algo crash them and lose half a day or more.
SP_ v30a/b/c/d (four separate build changes to my count) --
Hello all! Glad that several people replied to my posts yesterday and today. I'll try to answer all...
First, I run two nearly identical Linux rigs, same MB,OS, different CPUS, slightly different cards. Six cards per rig, the fast, reliable rig has 6x EVGA FTW 750ti cards, the slower rig has 6x EVGA SC 750ti cards. The 750ti SC cards have no 6-pin PCI connector, and these cards run on a MB with a 2-core Sempron 145 (unlocked).
There is no Linux overclocking control that I know of, all my cards run at stock clocks. I don't know how to synch my cards in Linux, either. My faster, reliable rig has an AMD FX chip, 2 cores, and is capable of 3.2 GHz. The unlocked Sempron 145 has 2 cores, and is capable of 2.8GHz. They have equal cache (64/64/1024).
Right now the slowest of 12 cards is running at 6000kh/s, the fastest at 6340kh/s. This is stock speed, and I am running on SP_ v30d, a fresh build within the last hour on both rigs. My fast rig is at 37.60mh/s, my slow rig is at 36.35mh/s. This is about 100kh/s better per rig than v30b. Both rigs are running smoothly.
SP_ build v30c was a disaster, my cards ran at 4+ mh/s and the rig crashed in short order. I shut my slow rig off (early am) and went to bed. My fast rig was running v30b smoothly, I just let it run.
As I was typing this, my slow rig crashed. It had 232/235 accepts. I am going to reboot it and keep trying. --scryptr
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