Re: Desperately need advice on putting 7990's to best use.

Quote from: unitedminers on July 17, 2014, 07:09:26 AM

Quote from: cryptod00d on July 16, 2014, 10:25:57 PM

I finally got it to work using this: https://bitcointalk.org/index.php?topic=658975.msg7412560#msg7412560

The problem is that I'm only getting 5Mhs per 7990(a 7990 is 2 7970s). If there's anyone out there that can get me 8Mhs per 7990 I'd tip them very generously.

What's your OS? Which algorithm do you want to mine? Your link mentiones X11 not X13.

My rig with Xubuntu 13.10 64bit, Catalyst 14.6 Beta, SGMiner 5, 8 GB Ram:
R9 290 Scrypt = 905 kHs, 350 Watt
R9 290 X11 = 4600 kHs, 220 Watt
R9 290 X13 = 3500 kHs, 225 Watt
R9 290 X15 = 3000 kHs, 225 Watt

Sorry, I'll give more info. I'm trying to run with x13. I'm on Windows 7. I have between 4-8GB in each rig; I've never seen a difference in terms of memory for mining though, truth be told. My GPUs are XFX 7990 Triple D's(not crappy hashers like most XFX). The miner I'm using is the one I linked, I believe it's sgminer 4.1 with the x11/x13 mod. I'm using a variety of drivers testing which delivers the best stability; drivers I'm using are 14.4, 14.6 and 14.7. None of them go over 2.65Mhs per 7970. Since I have so many and I pay no electric, even a little bit of performance makes a difference.