Title: Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost Post by: JuanHungLo on January 05, 2014, 05:15:26 PM This card is driving me nuts. I cannot get over 550Kh/s no matter what I do with cgminer 3.5 or 3.7.2
Model number: SAPPHIRE HD Radeon 11197-03-40G Here is the BIOS for this card: Sapphire.HD7970.3072.120925.rom bios p/n as reported by AtiFlash is 113-2104XTHY-0B5 Rig is Win 7 64 prof. 4GB 1066 Corsair DDR3 in AsRock 790 Extreme3 MB, Rosewill LIGHTNING-1300, 4 riser cables, Sempron 145, SSD HD. Rig never gets too hot in crate with huge fan constantly circulating. Current cgminer config (although I have tried just about everything): setx GPU_MAX_ALLOC_PERCENT 100 setx GPU_USE_SYNC_OBJECTS 1 cgminer.exe --scrypt -o stratum+tcp://gigahash.wemineltc.com:3334 -u UUUUUUUU.1 -p PPPPPPP --shaders 2048 --thread-concurrency 10240 --intensity 13 --queue 0 --worksize 256 --gpu-fan 50 --gpu-engine 1075 --gpu-memclock 1500 --gpu-vddc 1.125 --gpu-powertune 20 --no-submit-stale -g 2 -v 1 --lookup-gap 2 I have moved the switch to the 1 setting for flashable ROM on all 4 cards. I flashed ROM with 3 older versions of Sapphire HD Radeon 7970 bioses, 2 crash and other 1 is no change. I did this test on GPM #2. Please advise. Thanks. Title: Re: Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost Post by: Gazza1 on January 05, 2014, 06:59:23 PM 1050/1500 and 1080/1500 work best for 7970s. also tc of 8192 and remove -v 1
make sure to delete the old tahiti file in the cgminer folder first when you change thread concurrency. also see if you can get by with powertune 0. +20 was the hype previously but usually not needed. Title: Re: Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost Post by: JuanHungLo on January 05, 2014, 07:22:43 PM 1050/1500 and 1080/1500 work best for 7970s. also tc of 8192 and remove -v 1 make sure to delete the old tahiti file in the cgminer folder first when you change thread concurrency. also see if you can get by with powertune 0. +20 was the hype previously but usually not needed. Thanks for your reply. I just did as recommended and went with the 1050/1500: net result is gain of 10Kh/s. I am still nowhere near what others report of >700. Any other ideas? Are there any motherboard BIOS defaults that could be changed to help? Just guessing... Title: Re: Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost Post by: Gazza1 on January 05, 2014, 07:35:52 PM did you change tc to 8192 and remove v 1?
Title: Re: Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost Post by: JuanHungLo on January 05, 2014, 07:45:42 PM did you change tc to 8192 and remove v 1? Yes. I am really wondering if a BIOS flash to something else might help. All 4 of these cards are refurbs. They look brand new but it makes me wonder if Sapphire didn't flash them. Title: Re: Need help with SAPPHIRE HD 7970 3GB GDDR5 OC with Boost Post by: JuanHungLo on January 05, 2014, 09:09:59 PM Ok, here is the link of a post that has worked for me. Maybe it will for you, too, someday:
https://bitcointalk.org/index.php?topic=200777.msg3870088#msg3870088 (https://bitcointalk.org/index.php?topic=200777.msg3870088#msg3870088) Now getting >700! |