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Title: Is power +20 really neccessary, Im running ok with -20! Post by: tom_o on May 16, 2013, 12:40:19 PM Able to overclock my windforce 7970 to 1080/1500 with -20 power, although the temperature is still around 90 degrees!
Is this normal? The card gets fresh air but originally sat at around 70 but now is always above 88 under load. Changing the power setting seems to do nothing. Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: deadweasel on May 16, 2013, 12:42:40 PM Able to overclock my windforce 7970 to 1080/1500 with -20 power, although the temperature is still around 90 degrees! Is this normal? The card gets fresh air but originally sat at around 70 but now is always above 88 under load. Changing the power setting seems to do nothing. Yes, if you overclock your gpus they get hotter. Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: tom_o on May 16, 2013, 12:45:00 PM Able to overclock my windforce 7970 to 1080/1500 with -20 power, although the temperature is still around 90 degrees! Is this normal? The card gets fresh air but originally sat at around 70 but now is always above 88 under load. Changing the power setting seems to do nothing. Yes, if you overclock your gpus they get hotter. What I meant is it used to run at 70-73 overclocked at that speed, one day it was suddenly almost 20 degrees hotter. Could this be a sign of the the VRM going dodgy? Only a month old! Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: nwoolls on May 16, 2013, 01:02:34 PM What I meant is it used to run at 70-73 overclocked at that speed, one day it was suddenly almost 20 degrees hotter. What is your fan speed set to? In my experience, don't leave it to the AMD/ATI drivers to adjust. Set it manually to ~75% or use cgminer's --auto-fan, whichever works better and keeps your temps down.Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: dogie on May 16, 2013, 01:23:05 PM What this is suggesting is the card isn't getting near to the designed TDP, so the cap is doing nothing.
Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: tom_o on May 16, 2013, 01:34:22 PM What I meant is it used to run at 70-73 overclocked at that speed, one day it was suddenly almost 20 degrees hotter. What is your fan speed set to? In my experience, don't leave it to the AMD/ATI drivers to adjust. Set it manually to ~75% or use cgminer's --auto-fan, whichever works better and keeps your temps down.The fanspeed is 100% 24/7 with a 80mm Arctic F8 blowing on the back of the VRM heatsink, which is still painful to touch. Set up a custom fan curve so that anything above 75 degrees gets 100% fan. 3368RPM -- not quiet Theres also fan in the PCI brackets below drawing in cold air from near the window and one at the front to expell the hot air that comes off the end of the card. Case is open too! I honestly think there might be something wrong with the card as it was running fine with the case closed when I first bought it! Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: nwoolls on May 16, 2013, 02:23:20 PM I honestly think there might be something wrong with the card as it was running fine with the case closed when I first bought it! Agreed - that sounds super hot for that much airflow.Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: nwoolls on May 16, 2013, 02:31:16 PM The fanspeed is 100% 24/7 with a 80mm Arctic F8 blowing on the back of the VRM heatsink, which is still painful to touch. Set up a custom fan curve so that anything above 75 degrees gets 100% fan. 3368RPM -- not quiet 3368 is your RPM at 100% fanspeed? My 7950's at 75% fanspeed run at 4200 RPM. That sounds like a problem there. I see others reporting similar issues (http://www.tomshardware.com/forum/387187-33-r7970-lightning-speed-stays-3150-matter).Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: tom_o on May 16, 2013, 03:11:46 PM The fanspeed is 100% 24/7 with a 80mm Arctic F8 blowing on the back of the VRM heatsink, which is still painful to touch. Set up a custom fan curve so that anything above 75 degrees gets 100% fan. 3368RPM -- not quiet 3368 is your RPM at 100% fanspeed? My 7950's at 75% fanspeed run at 4200 RPM. That sounds like a problem there. I see others reporting similar issues (http://www.tomshardware.com/forum/387187-33-r7970-lightning-speed-stays-3150-matter).Which type of card though? Mines a gigabyte windforce so there are 3 fans so they may run slower, although saying that they don't seem to be kicking out as much air as they were originally. That guy's problem seems to be getting stuck at 100%. I dont mind 100% as I wont be in the same room as the miner after next week as Im moving home from uni halls, but I don't want the card to explode into flames while I'm gone! Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: tarrant_01 on May 16, 2013, 03:18:30 PM I can't say that they are the same fans, but I've been mining with 4 Gigabyte 6950's for a over a year and the fans always went bad rather regularly causing high temperatures. The good thing is, it only takes about 2 weeks for Gigabyte to fix them through RMA.
Title: Re: Is power +20 really neccessary, Im running ok with -20! Also 90*C @ 100% fan Post by: tom_o on May 16, 2013, 03:22:03 PM I can't say that they are the same fans, but I've been mining with 4 Gigabyte 6950's for a over a year and the fans always went bad rather regularly causing high temperatures. The good thing is, it only takes about 2 weeks for Gigabyte to fix them through RMA. I think ill leave it for now, when the weather gets cooler or the breeze goes into my window properly it gets down to the mid 80's, I'll probably be getting rid of it before August anyway due to running out of free power! 2 weeks is far too long not to be mining for. And if it does die I can just a get a new un! Not my fault if their fans are shit quality and have to be babysitted. Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: bitman442 on May 16, 2013, 04:37:26 PM Do you know what voltage your card is running at? You can check it with GPU-Z
Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: deadweasel on May 16, 2013, 04:45:04 PM I would run with --autofan
Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: tom_o on May 16, 2013, 04:58:04 PM I would run with --autofan Just tried that but adding autofan crashes cgminer =/ Voltage is 1.11v Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: greaterninja on May 16, 2013, 05:05:32 PM downclock your ram on the video card if you are btc mining...it will make a world of difference in temps. i got mine to 150mhz each card. 10-20c cooler now.
Title: Re: Is power +20 really neccessary, Im running ok with -20! Post by: tom_o on May 16, 2013, 05:19:25 PM downclock your ram on the video card if you are btc mining...it will make a world of difference in temps. i got mine to 150mhz each card. 10-20c cooler now. My card doesn't like bitcoin mining it seems to get stuck in litecoin mining mode, even if i download a fresh cgminer it goes at 750khash and 0 accepted! See here: https://bitcointalk.org/index.php?topic=206525 So yeah I cant really clock down the RAM as that's the ideal ratio. |