Quote from: tdslot on August 20, 2013, 11:47:28 AM

Hello,

I have problem.

Who can help me?

I have mining rig hardware:

4x XFX7950 FX-795A-TDJC
ASUS SABERTOOTH 990FXR2.0 motherboard
8GB RAM
CPU AMD FX8320 8x Cores 3.51 Ghz
PSU Lepa 1600W

Software:

Windows 7 SP1 x64
AMD Radeo HD drivers 13.4 x64
AMD SDK 2.7 x64
CGMINER 3.3.1

My cgminer.conf

Code:

"api-allow" : "W:127.0.0.1",
"api-listen" : true,
"api-port" : "4028",
"expiry" : "120",
"failover-only" : true,
"hotplug" : "5",
"kernel-path" : "/usr/local/bin",
"log" : "5",
"no-submit-stale" : true,
"queue" : "1",
"rotate" : "10",
"scan-time" : "30",
"scrypt" : true,
"shares" : "0",
"auto-fan" : true,
"gpu-threads" : "1",
"gpu-dyninterval" : "7",
"gpu-engine" : "0-1025",
"gpu-fan" : "0-100",
"gpu-platform" : "0",
"gpu-memclock" : "1250",
"gpu-memdiff" : "0",
"gpu-powertune" : "0",
"gpu-vddc" : "1.087",
"intensity" : "20",
"temp-target" : "75",
"temp-overheat" : "88",
"temp-cutoff" : "95",
"temp-hysteresis" : "3",
"vectors" : "1",
"worksize" : "256",
"lookup-gap" : "2",
"shaders" : "2048",
"thread-concurrency" : "21712",
"no-pool-disable" : true

With this configuration 3x GPU cards running stable. But when I connect 4 card and run cgminer works very bad and turnoff motherboard. But PSU still running.

Who can help me with this problem? Maybe not impossible run rig with 4x GPU's? Maybe my configuration is wrong? Or I forget something to install?

Than you in advance,

TDS

TDS

1. Your shaders 2048 is all wrong, those are for 7970 cards, 7950 is 1792
2. gpu-powertune, change it to 20
3. Lower intensity to 19

when you set your voltage from 1.250 down to 1.087 you need powertune to keep it stable

give that a try, if it dosent help let me know