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Title: The problem with performance 280x cards Post by: kemor1509 on April 13, 2014, 06:16:36 PM 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 Title: Re: The problem with performance 280x cards Post by: Coindgr on April 13, 2014, 08:35:40 PM Power supply specs ??
Title: Re: The problem with performance 280x cards Post by: Equate on April 14, 2014, 04:40:29 AM change gpu clock to 1020 and memory clock to 1500
Title: Re: The problem with performance 280x cards Post by: fattypig on April 14, 2014, 01:38:20 PM 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.. Title: Re: The problem with performance 280x cards Post by: mine2mind112 on April 14, 2014, 04:03:02 PM You shoud set -I 13 -g 2
Title: Re: The problem with performance 280x cards Post by: kemor1509 on April 14, 2014, 11:18:37 PM Power:
Switching Power Supply Model: TDPS-825AB B When I put -g 2 system off Title: Re: The problem with performance 280x cards Post by: DiggerPhil on April 14, 2014, 11:56:32 PM 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. Title: Re: The problem with performance 280x cards Post by: shijilal on April 15, 2014, 03:55:04 AM 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: , |