The problem with performance 280x cards

[kemor1509]

Hello,
I am a beginner.
I have a problem in setting the optimum performance of my miner.

I have:
System - Windows 7 64-bit
Processor - PENTIUM Dual-Core CPU E5200 2,5 GHz
RAM - 3 GB
graphics Cards - 2 x AMD RADEON R9280XGAMING3G
drivers - Catalyst 13.2
I use cgminer3.7.2

I'm trying to give different values ​​for the bat file but the highest speed that
I got the single card is about 300 Kh/s

My bat. file :
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o stratum+tcp://ltc.drillbit.me:3333 -u xxx -p xxx  --thread-concurrency 8192 -g 1 -I 12 -w 256 --auto-fan --gpu-fan 30-75 --temp-cutoff 90 --temp-overheat 85 --temp-target 73 --gpu-memclock 1023 --gpu-engine 1025
 
Max value -I is 12 when I entering higher system off , similarly is with -g 2
Does anyone of you had the same problem ?
Where I made a mistake? What I need to change?
Where can I find a solution?
Please help me

[Coindgr]

Power supply specs ??

[Equate]

change gpu clock to 1020 and memory clock to 1500

[fattypig]

Hello,
I am a beginner.
I have a problem in setting the optimum performance of my miner.

I have:
System - Windows 7 64-bit
Processor - PENTIUM Dual-Core CPU E5200 2,5 GHz
RAM - 3 GB
graphics Cards - 2 x AMD RADEON R9280XGAMING3G
drivers - Catalyst 13.2
I use cgminer3.7.2

I'm trying to give different values ​​for the bat file but the highest speed that
I got the single card is about 300 Kh/s

My bat. file :
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_USE_SYNC_OBJECTS 1
cgminer --scrypt -o stratum+tcp://ltc.drillbit.me:3333 -u xxx -p xxx  --thread-concurrency 8192 -g 1 -I 12 -w 256 --auto-fan --gpu-fan 30-75 --temp-cutoff 90 --temp-overheat 85 --temp-target 73 --gpu-memclock 1023 --gpu-engine 1025
 
Max value -I is 12 when I entering higher system off , similarly is with -g 2
Does anyone of you had the same problem ?
Where I made a mistake? What I need to change?
Where can I find a solution?
Please help me

change g1 to g2 and you are much better off..

[mine2mind112]

You shoud set -I 13 -g 2

[kemor1509]

Power:
Switching Power Supply
Model: TDPS-825AB B

When I put -g 2 system off

[DiggerPhil]

Each 280X requires around 250-300 watts of power. At 12V, this is 20-25A per card. Based on your power supply specs, none of the 12V rails can supply that much power. You haven't indicated how you have the power connectors connected, but to ensure that the maximum amount of power is available from each 12V rail, you could try using molex-to-pcie or sata-to-pcie connectors on as many different separate cables as there are coming out of the power supply. Unfortunately, it appears this power supply was designed to provide power to power-hungry CPU's as opposed to GPU's, so this still may not work.

The ideal solution would be to get a different power supply that has 12V rails capable of providing 25-30A each, or has a single 12V rail that can provide at least 60A. You could also try undervolting the cards to use less power.

[shijilal]

Given below is the setting i use for My 3*280X and 1 290X
First 2 280X are Saphire Toxic 280X
and the 3rd 280X is Asus DC2 280X
the 4th is PowerColor 290X
I am getting a hashrate between 780-800Kh/s from all the 3 280X cards
and between 750-800 for 290X card

Code:

,
"intensity" : "13,13,13,20",
"vectors" : "1,1.1,1",
"worksize" : "256,256,256,256",
"kernel" : "scrypt,scrypt,scrypt,scrypt",
"lookup-gap" : "2,2,2,2",
"thread-concurrency" : "8192,8192,8192,25400",
"shaders" : "0,0,0,0",
"gpu-engine" : "1160,1160,1160,947",
"gpu-fan" : "85,85,85,85",
"gpu-memclock" : "1800,1800,1800,1250",
"gpu-memdiff" : "0,0,0,0",
"gpu-powertune" : "20,20,20,-20",
"gpu-vddc" : "0,0,0,0",
"temp-cutoff" : "95,95,95,95",
"temp-overheat" : "0,0,0,0",
"temp-target" : "0,0,0,0",
"api-mcast-port" : "4028",
"api-port" : "4028",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"hotplug" : "5",
"log" : "5",
"no-pool-disable" : true,
"queue" : "1",
"scan-time" : "30",
"scrypt" : true,
"temp-hysteresis" : "3",
"shares" : "0",
"device" : "0-3",
"kernel-path" : "/usr/local/bin"
}