My so far best results on Sapphire R9 290 settings.

[mmyhre]

Been running a half a day so far and seems to be stable.

I still have not figured out why the 2 rigs produce different results yet.

Rig 1 : 2 x sapphire R9 290 on an PK5 motherboard

Rig 2 : 2 x sapphire R9 290 on an Asus Sabertooth 990fx

Both rigs have 850 PSU and run on the exact same setting. Setting in bold are changed from the default values of [url=http://rumorscity.com/2013/12/03/litecoin-gpu-mining-with-amd-r9-290-and-r9-290x-sweet-spot-for-1000khashsec/]http://rumorscity.com/2013/12/03/litecoin-gpu-mining-with-amd-r9-290-and-r9-290x-sweet-spot-for-1000khashsec/[/url]

Rig 1 gives out a whopping 950 khs and WU of 1850
Rig 2 however is at 850 with WU of 1600+

Temp around 60-75 with fan at 75 % and basement window open.

So if anybody know of any setting on the sabertooth that can be tweeked please do share some knowledge.

“intensity” : “20″,
“vectors” : “1″,
“worksize” : “256″,
“lookup-gap” : “2″,
“thread-concurrency” : “32765″,
[b]“gpu-engine” : “1050″,[/b]
“gpu-fan” : “40-100″,
[b]“gpu-memclock” : “1450″,[/b]
“gpu-powertune” : “20″,
“temp-cutoff” : “99″,
“temp-overheat” : “95″,
“temp-target” : “90″,

“api-port” : “4028″,
“expiry” : “120″,
“failover-only” : true,
“gpu-threads” : “1″,

“log” : “5″,
“queue” : “1″,
“scan-time” : “60″,
“temp-hysteresis” : “3″,

[TrollboxChamp]

Can you list the hash rates of each card. Thx I am not sure if youre getting 950 from both cards or just one.

[mmyhre]

On the Sabertooth rig

Card 1 851 / 812 WU
Card 2 851 /785 WU

PK5

Card 1

935 / WU 901

Card 2

940 / WU 917

On booth they do jump around a bit, from 1590 WU to 1650 on the sabertooth rig and 1800 - 1875 WU on the PK5 rig.

[mmyhre]

???

And on the Sabertooth motherboard it really helped to choose high power mode rather than power saving mode. >:(

Both running similar speeds of 920 - 950 ish with WU about 1750-1800

So if anybody else have this mob. Do choose the fire icon setting in bios.

[TrollboxChamp]

Ahhh wow. I am gonna go check my mobo. I have a 990fx lol!!

I heard that sometimes lowering the resolution helps with under-performing set ups. Never tried to do it though.