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Number crunching :
GPU Problem
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Brent Norman Send message Joined: 1 Dec 99 Posts: 2786 Credit: 685,657,289 RAC: 835 |
OK start up was 35C 40 after 10 sec 41 after 20 42 after 30 48 after 60 49 after 120 51 after 240 Doesn't seem to me like an excessive spike in temp. After yanking the card apart and fresh paste, seemed much the same for startup. Then I put the cover back on, and got up to 64 consistent temp, geesh I was 58-59C before, Guess I got to try that again. Still by what I hear that is not too hot. I remove my 50C limit, will see if I start to kick out errors again. My guess is yes, it will. Keith, Yea the 240 is not a dynamite card, I did see in my searches some don't even have a fan on them. But oh well it came with the computer. |
Brent Norman Send message Joined: 1 Dec 99 Posts: 2786 Credit: 685,657,289 RAC: 835 |
BTW I do really appreciate the expert advice of the volunteer/development team. You guys are great! And yea, my problems are most likely not over so will be asking more :D |
Keith Myers Send message Joined: 29 Apr 01 Posts: 13164 Credit: 1,160,866,277 RAC: 1,873 |
Brent, that is typical behavior for a fresh coat of TIM. Normally needs some time for it to "bed" in. It should drop after a couple of days. Keith Seti@Home classic workunits:20,676 CPU time:74,226 hours A proud member of the OFA (Old Farts Association) |
Brent Norman Send message Joined: 1 Dec 99 Posts: 2786 Credit: 685,657,289 RAC: 835 |
Unrelated, well relate in a thermal sense it is. This computer couldn't be worse designed for heat dissipation if they actual tried to do that. While looking at my GPU and heat, the CPU is located so close to the card, and you guessed it ,,, it exactly lines up with blowing heat on the backside of the GPU chip. They couldn't have tried to get it any closer. I wish I had a spare slot there to put in a heat barrier shield. No wonder I see the GPU temp jump so much if I work the CPU hard. And CPU temps change with MB/AP, AP runs hotter for my CPU. I seriously thought of firing up the TIG welder to put a deflector on the heat sink so it doesn't blow on the GPU, then thought different heatsink/fan would be a whole lot easier:) I'm sure I could get a directional one, or water cooled, even better. My case fan is sucked up so tight to the power supply intake that at best, it is just disturbing the airflow into the PS. It is definitely going to move. Keith, yea I do see a little drop in temps since yesterdays thermal redo. 1 or 2C. |
Brent Norman Send message Joined: 1 Dec 99 Posts: 2786 Credit: 685,657,289 RAC: 835 |
Well I'm still scratching my head and trying TO figure out WHY I was running 100% errors on my GPU. Heat didn't seem to be the thing, no invalids at just letting GPU go at it's max ... whatever it what to gobble. I am completely confuzzed at this point of where all my errors came from! I started this venture by changing 1 thing at a time to find this problem. Now that I know things work OK, I'm going to keep stepping back to see what broke it in the first place. Being technically oriented ... yea I just have to know the WHY! My rating is screwed now anyways :) |
Grant (SSSF) Send message Joined: 19 Aug 99 Posts: 13746 Credit: 208,696,464 RAC: 304 |
While looking at my GPU and heat, the CPU is located so close to the card, and you guessed it ,,, it exactly lines up with blowing heat on the backside of the GPU chip. They couldn't have tried to get it any closer. I wish I had a spare slot there to put in a heat barrier shield. No wonder I see the GPU temp jump so much if I work the CPU hard. Not because of the heat blowing on the card, but because of the overall increase in temperatures within the case. Just removing the side panel from my systems dropped the CPU temperatures by 5°c. The temperature of the air coming off of the CPU heatsink in most instances is considerably less than the temperature of the back of the video card, so the air (as hot as it is) coming from the CPU actually helps cool down the video card in most instances. Grant Darwin NT |
BilBg Send message Joined: 27 May 07 Posts: 3720 Credit: 9,385,827 RAC: 0 |
Well I'm still scratching my head and trying TO figure out WHY I was running 100% errors on my GPU http://setiathome.berkeley.edu/forum_thread.php?id=76946&postid=1655235#1655235 "... when I was actually running at 925MHz" Â - ALF - "Find out what you don't do well ..... then don't do it!" :) Â |
Brent Norman Send message Joined: 1 Dec 99 Posts: 2786 Credit: 685,657,289 RAC: 835 |
Josef did touch on something that I think my problem is ... There's a perhaps related issue with that GPU, it is manufacturing false signals fairly often and so has more inconclusive and invalid results than reasonable. Some are extremely wrong, like infinite peak power for AP single pulses. I have been testing and testing trying to figure out why settings that wouldn't work before are now working. I have came to the conclusion it is Catalyst. I can change my clock speeds up/down and see what works. But I bumped my voltage by 10% and errors every 20 sec of running, OK fine remove that (errors) slow clock down (errors) go back to default (errors) try power +1,-1, 0 (errors) restart BOINC (errors) reboot ... tasks are running and will see what happens now. It seems my version of Catalyst doesn't like you change power levels. So in the beginning when I was chasing all these errors and trying to figure it out, I should have rebooted, which I did when I put heatsink paste on - BTW I do think that overhaul helped. Still testing here to see what clock speeds work, what doesn't. Just time consuming when I'm not putting out a lot of tasks so I have to wait a day or 2 for wingmen to get a read if the change worked or not. Then I guess I will have to update my driver/Catalyst - just have the mindset of many, if it works why change it? But have now seen that part of it does NOT work. I love computers, I love computers, never know what surprise they may bring you :) |
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