Quote from: Blank on July 18, 2014, 12:33:23 AM

To my knowledge X11 and X13 jump around in profitability, one day X11 is better the next X13 so really just pick one and in the long run the results would probably have been the same.

There are a few pools now that use sgminer 5 which can automatically change algorithm for you to the most profitable but you should probably try and get them working efficiently before thinking about that.

You might be getting slightly confused about hash rates for x13 8mhs would only be possible with a very hefty overclock.
For my 280x's (same as 7970) with around 1100 Core clock (slight undervolt) and low memory clock i get ~3mhs each so you would be looking at more like 6-7mhs depending on how high you clock them.

Also i will offer some advice that if performance per watt matters (you said not for you) i found increasing memory clock does improve hashrate but it's not normally worth the extra power/heat.

I actually found x11/x13 mining much easier to set-up than scrypt mining, there is no voodoo of getting the right clock speed/and Thread concurrency. It just worked on pretty much the default settings and any increase's in clock or memory clock are linear improvements in hashrate.

My sgminer 5 .bat for my 3 card rig:

sgminer --auto-fan --temp-target 66 -g 4 -w 64 -X 256 --gpu-engine 1063,1119,1113 --hamsi-expand-big 1 --algorithm marucoin-mod

only running at 800 Mem clock right now mainly due to it being Hot atm and that it is better Hash per watt.

Really crashes, HW ect probably just means your clocks are too high, just try lowering your core clock abit more and it will probably be ok :X

I've got it running at over 3Mhs on x13 stable for about 10 mins, haven't done long-term testing. I think I might abandon x13 and use x11 though if it's better for heat because it's getting HOT without having them undervolted anymore. 1 card on each rig is almost to 99c, room temp getting to 93f even at night. The problem is that with x11 I'm getting 100% rejected shares for "low difficulty shares". Any idea what's wrong? I tried using the same settings that work perfectly with x13, no luck. Now I'm trying a million other combos with no success.