gpu isnt working properly

Questions and Answers : Windows : gpu isnt working properly

Author	Message
MrMeta Send message Joined: 10 Apr 12 Posts: 13 Credit: 47,912 RAC: 0	Message 1217668 - Posted: 13 Apr 2012, 16:25:04 UTC Last modified: 13 Apr 2012, 16:32:30 UTC
	hi my problem is that my gpu gtx 285 is not working under full load. 1. the temperature is much lower than when its normal working and 2. the gpu is crunching very slowly. it seems to be that the cpu cant deliver data to the gpu as it is itself under heavy load. how can I change that? right now I got 3x cpu and 2x gpu/cuda tasks running and cpu is 100% stressed. taskmanager tells me that the task on gtx 285 is using only 0.1 % cpu load .. edit: I changed the priority of the process in the task manager to high but that doesnt help in my case
	ID: 1217668 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 17,895,695 RAC: 59,928	Message 1217676 - Posted: 13 Apr 2012, 16:43:15 UTC - in response to Message 1217668.
	Most GPU tasks won't fully load a GPU, which is why some people run more than 1 workunit per GPU. It is perfectly normal for the CPU to only be used 0.1% as that is all that is needed to load the task into the GPU. It is not indicative of a CPU-starved GPU.
	ID: 1217676 ·

MrMeta Send message Joined: 10 Apr 12 Posts: 13 Credit: 47,912 RAC: 0	Message 1217687 - Posted: 13 Apr 2012, 16:51:52 UTC - in response to Message 1217676. Last modified: 13 Apr 2012, 16:53:19 UTC
	but why my other gpu task is using the same amount of cpu load (about 20-24%)as a cpu task itself? and how can I get more than 1 task per gpu as I would like to get max load everywhere.
	ID: 1217687 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 17,895,695 RAC: 59,928	Message 1217692 - Posted: 13 Apr 2012, 16:58:51 UTC - in response to Message 1217687.
	Your other GPU task may have likely dropped back to the CPU instead. Since I don't use nVidia GPUs, I don't exactly know what causes this, but I'm told it has something to do with the video drivers in use. To make your GPU work on more than 1 workunit (task) at a time, see this thread.
	ID: 1217692 ·

Gatekeeper Send message Joined: 14 Jul 04 Posts: 702 Credit: 139,579,608 RAC: 224,694	Message 1217702 - Posted: 13 Apr 2012, 17:14:29 UTC - in response to Message 1217692.
	Your other GPU task may have likely dropped back to the CPU instead. Since I don't use nVidia GPUs, I don't exactly know what causes this, but I'm told it has something to do with the video drivers in use. To make your GPU work on more than 1 workunit (task) at a time, see this thread. I wouldn't recommend more than 1 WU at a time for his configuration. He's using use_all_gpus in cc_config as one of his GPU's is actually a 9500GS, not the 2 285's BOINC shows. Also, from what I can check in his pendings and valids, they have all been processed on the 285, so it's only a guess, but maybe the 9500 is falling back on its workunits. ____________
	ID: 1217702 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 17,895,695 RAC: 59,928	Message 1217704 - Posted: 13 Apr 2012, 17:16:22 UTC - in response to Message 1217702.
	Your other GPU task may have likely dropped back to the CPU instead. Since I don't use nVidia GPUs, I don't exactly know what causes this, but I'm told it has something to do with the video drivers in use. To make your GPU work on more than 1 workunit (task) at a time, see this thread. I wouldn't recommend more than 1 WU at a time for his configuration. He's using use_all_gpus in cc_config as one of his GPU's is actually a 9500GS, not the 2 285's BOINC shows. Also, from what I can check in his pendings and valids, they have all been processed on the 285, so it's only a guess, but maybe the 9500 is falling back on its workunits. There you go. Follow Gatekeeper's advice since he would know better than I would.
	ID: 1217704 ·

MrMeta Send message Joined: 10 Apr 12 Posts: 13 Credit: 47,912 RAC: 0	Message 1217711 - Posted: 13 Apr 2012, 17:36:38 UTC - in response to Message 1217702.
	I wouldn't recommend more than 1 WU at a time for his configuration. He's using use_all_gpus in cc_config as one of his GPU's is actually a 9500GS, not the 2 285's BOINC shows. I just restarted the pc and now it seems that my issue is solved. for now at least. gtx 285 is now full loaded aswell as my 9500gs and temperature is again at lovely 50°C . one more off topic question: could it be that the total power consumption under full load with boinc tasks is much lower than when gaming or benching the system? I measured the power comsumption and its just ~210w with stock q8200 and 9500gs but the gtx 285 is slightly overclocked and overvolted. I remember when gaming in the past on this system it consumed more for sure...even without the additional 9500gs..
	ID: 1217711 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 17,895,695 RAC: 59,928	Message 1217714 - Posted: 13 Apr 2012, 17:42:10 UTC - in response to Message 1217711.
	could it be that the total power consumption under full load with boinc tasks is much lower than when gaming or benching the system? I measured the power comsumption and its just ~210w with stock q8200 and 9500gs but the gtx 285 is slightly overclocked and overvolted. I remember when gaming in the past on this system it consumed more for sure...even without the additional 9500gs.. Not sure about your data or your representative sample, but in no way should any game use more power than BOINC. Most games are still single-threaded, and even newer games simply utilize two cores. The load games put on a GPU depends on many different factors, including what generation GPU, what class GPU, how much GPU RAM, and what target level of graphics the game was designed for (e.g. DirectX 9 vs DirectX 11). Since BOINC will fun a system at full load on all CPUs (unless otherwise told) and will stress the average GPU out there, power consumption under BOINC is at nearly max 24/7. It is for this reason that many people use BOINC, or a similar program Prine95 as a stress-testing tool. Benchmarks are quite synthetic and don't really reflect real-world usage.
	ID: 1217714 ·

MrMeta Send message Joined: 10 Apr 12 Posts: 13 Credit: 47,912 RAC: 0	Message 1217720 - Posted: 13 Apr 2012, 17:53:27 UTC - in response to Message 1217714. Last modified: 13 Apr 2012, 17:54:59 UTC
	Not sure about your data or your representative sample, but in no way should any game use more power than BOINC. Most games are still single-threaded, and even newer games simply utilize two cores. The load games put on a GPU depends on many different factors, including what generation GPU, what class GPU, how much GPU RAM, and what target level of graphics the game was designed for (e.g. DirectX 9 vs DirectX 11). Since BOINC will fun a system at full load on all CPUs (unless otherwise told) and will stress the average GPU out there, power consumption under BOINC is at nearly max 24/7. It is for this reason that many people use BOINC, or a similar program Prine95 as a stress-testing tool. Benchmarks are quite synthetic and don't really reflect real-world usage. thats why I was wondering..also 210w seem to be low for the whole system as stock gtx 285 consumes about 180w @ full load..so the system is not full loaded by my boinc tasks or my measurements are wrong. but hey I just tested a 1000w toaster and it displays 1000w on my device so its ok. makes me think how to squeeze more out of my system as it isnt used 100% apparently..maybe I should try to use more tasks on gpu as cpu is 100% loaded? Im thankful for any advice
	ID: 1217720 ·

Volunteer tester Send message Joined: 9 Apr 02 Posts: 11987 Credit: 17,895,695 RAC: 59,928	Message 1217723 - Posted: 13 Apr 2012, 17:59:57 UTC - in response to Message 1217720.
	thats why I was wondering..also 210w seem to be low for the whole system as stock gtx 285 consumes about 180w @ full load..so the system is not full loaded by my boinc tasks or my measurements are wrong. but hey I just tested a 1000w toaster and it displays 1000w on my device so its ok. Well a computer is just a tad more complex than a toaster. ;-) A toaster will use full wattage by default so as to perform the simple job it was designed to do. Most people don't want their computers running at max power so they can be "green", so manufacturers have made sure that the system only consumes as much power as it needs to run. But you said you compared your system under load with BOINC, games, and benchmarks, and that is what I was questioning. makes me think how to squeeze more out of my system as it isnt used 100% apparently..maybe I should try to use more tasks on gpu as cpu is 100% loaded? Im thankful for any advice Sounds like you're a power cruncher. You should really visit the Number Crunching forum where like-minded individuals want to get the most out of their system as well.
	ID: 1217723 ·

Questions and Answers : Windows : gpu isnt working properly