I too am getting lots of invalid results is this because there is a problem with my fan when I switch on my machine. Have to log in then out again as the fan is making a terrible noise then restart my machine. Think I need a new one even though I have not had it a year it has been into the shop because the P.S.U. went down and now the fan

All your invalids are due to this

http://setiathome.berkeley.edu/forum_thread.php?id=76479

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I am also getting a massive number of invalid tasks (322), since early December. The only thing I have done during that time is to install Windows 8.1 Pro., previously W7 Home Premium. may have also updated graphics driver. Currently running Catalyst 14.12 on an AMD Radeon HD7870.

Any thoughts.

Thanks,

Brett

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I am also getting a massive number of invalid tasks (322), since early December. The only thing I have done during that time is to install Windows 8.1 Pro., previously W7 Home Premium. may have also updated graphics driver. Currently running Catalyst 14.12 on an AMD Radeon HD7870.

Any thoughts.

Thanks,

Brett

Your MB invalids are mostly the tasks that are damaged in some fashion. However the AP on your GPU started Jan 2nd. Since then your GPU has increased it's error rate to the point you are now only returning about 30% valid work. My first guess would be overheating in your case. Given you were returning valid results with 14.12 for nearly a month before the errors started occurring.

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SETI@home classic workunits: 93,865 CPU time: 863,447 hours
Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[

OK, Well I pulled it out, gave it a really good clean, along with the case (which gets cleaned regularly). Put it back, fired it up and it is currently running at 79C while crunching a SETI@home v7 7.03 (opencl_ati_cat132). For the record it is running stock. When I snooze the GPU, the temperature drops to approx. 45C after about 1 minute. Will monitor for a couple of days.

Brett

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That seems to have done the trick, everything running much smoother now.

thanks HAL9000

Brett

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I'm happy to report, for this problem at least, that the problem is definitely solved and it was an insufficient power supply/PSU.

This machine which generated well over a hundred Invalid results a day on its GTX980 (until throttled) as of this writing hasn't generated a single one in two days on a new PSU, moving from a no-name 680W PSU to one of these.

Note the NVidia GTX 980 specs.:

Thermal and Power Specs:
Graphics Card Power (W) 165 W
Minimum System Power Requirement (W) 500 W

For most if not all 500W PSUs for anything but casual gaming, this is underrated, as the quality of power they are going to deliver is going to be poor close to their limits (read this article on PSU Ripple for an example... as Mark so appropriately puts it they "cough up a furball" on your work units.) So if you are having this issue I would suggest getting a better PSU. Do some research on the make/model and of course: you get what you pay for. There are numerous quality brands and models (for example I've had very good performance for years and recently with 2x980s on this PSU) but two brands that seem to be mentioned the most are Corsair and Seasonic, for consistency at least (some makers have good high-end PSUs but their lower-end are substandard.)

(If you can't afford a new one, you can get a good used one (scored two excellent ones this way including the RM850) by being a "smart shopper" and following a few common-sense guidelines: buy from a seller in their residence not from "meetups", make sure it comes with a sales receipt to allow RMAing if it fails and show when it was bought, which also shows that it isn't stolen property... hot PSU in any sense is bad! (original box and all packaging/cabling is good too), bring a PSU tester (I paid $12 for mine years ago and it's been a very useful investment) or demo it running a system under load, should be clean/scratchless and of course not make any odours!)

And as noted earlier, for some reason, MB (multibeam=standard SETI) CUDA work is the only thing that has pushed the GPU/PSU over the threshold and caused this effect, on both stock and anonymous/Lunatics platforms. Astropulse CUDA doesn't seem to and neither did any Einstein@Home CUDA application. MB CUDA is the vast majority (95% or more) of what our GPUs will be doing here of course.

Hope this helps. :^)

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As the old drag racer's addage goes, there is no replacement for displacement.
Or in these terms, wattage.

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"Freedom is just Chaos, with better lighting." Alan Dean Foster