I do like the Sapphire Tri-xx 290, although the trixx s/w is for crap..
So you're hitting 330+ with a 290 and I can get close to 320 with a 290x overclocked to 1040/1500. Do you think this is due to you using 14.9 drivers and dropping the 14.6 files into the mining directory, whereas I'm just using 14.6? Have you observed any benefit/negatives for X11 or other coins when you do this?
LOL, at least you can get ~320 with your 290x, I can only get ~310 before the HW start climbing.. Stupid Elpida memory is what I'm blaming for that. (XFX 290X)
That speed is due to a lot of things. One of them is the 14.6/14.9 drivers, another is the wolf compiled 64 bit version of SG5.1, and of course the 2 big keys are the wolf kernel and hours of trial and error.
Never tried the driver change on the other algo's, as my first venture outside scrypt was being involved in the early beta testing of neoscrypt for GPU's, and to get any speed at all the driver switch had to be made.
I don't think elpida memory could account for such a wide discrepancy in the hash or the HW errors. At the very least a 290x should be equal with a 290, the only difference is the number of shaders at least for a reference card. If it was a hynix 290x hitting 330+ and an elpida 290x hitting 310, then maybe I could understand. I've got a hynix 290x in my test rig and I forgot what the other one is but I can test. I realize you spent hours on your config for your 290 but if you feel like showing it I can start from there. I've got 14.6 rc2 installed on the test rig and I'm going to install 14.9 tonight and drop the 14.6 in the mining directory (I also use wolf0's builds). Do you use Stilt's bios? I couldn't get stilt's bios stable for the X coins but I wonder if it will work for neoscrypt. Maybe Stilt on neoscrypt will let us find the right ratio of gpu to memory clock (if neoscrypt is anything like scrypt). Sad thing is this really doesn't make too much of a difference in profit.