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SETI MB CUDA for Linux
sunu:
--- Quote from: riofl on 23 Jan 2010, 03:16:04 pm ---the sensors core0VID is the VID as reported by the chip itself. still there is a difference between linux and windows.
linux says it is 1.219 while coretemp reports it as 1.2500
--- End quote ---
Why do you say that? We were never sure about core0vid and as I said in another post, 1.219 as a VID, was a strange number anyway. Coretemp clears the things for us, your chip's VID is 1.2500 and that core0VID from lm-sensors is something else.
--- Quote from: riofl on 23 Jan 2010, 03:16:04 pm ---under load after 4 iterations of the smal fft test
core0=56
core1=56
core2=51
core3=51
cpuz coreV=1.2500 initially then after a few seconds drops to 1.216
--- End quote ---
1.216 volts under load? At 3Ghz? Might be dangerously low. Maybe not. See also below.
--- Quote from: riofl on 23 Jan 2010, 03:16:04 pm ---played around at 3.6ghz but since i have changed ram from the last time (old ram was crucial ballistix new ram is OCZ low voltage Blade series) I find that at 3.6ghz the lowest besides 1000 i can go is 1200 which the ram plainly complains even upped from 1.8 to 2.0 volts which is .1 v higher than recommended maximum. so i had no success in stability at 3.6ghz so i dropped it to 3.45ghz along with 1152 on the ram (base is 1066) and VCore set at 1.312v.
--- End quote ---
What vcore at 3.6GHz? Might not be the memory's fault but too low vcore. You also say "vcore set at 1.312v". Where, in bios? Don't look there. Look at what cpu-z says under 100% load. That's the one to watch. Before I pencil moded my motherboard I had to set the vcore in bios at 1.4750 in order to achieve 1.3000 under 100% load.
--- Quote from: riofl on 23 Jan 2010, 03:16:04 pm ---the system passed small fft , large ffp and mixed bag with flying colors. i then booted into memtest86 and ran 2 iterations of its test and all passed just fine.
--- End quote ---
How much time did you let prime95 run? Many people consider a system stable after 12, 18 or even 24 hours of prime95 load. For my overclock of 3.24Ghz I went over the board and ran prime95 for three days: one day small FFTs, one day large and one day mixed ;D Also for memtest, I think they recommend to also leave it for many hours to be sure that your ram is good and stable. Whenever I buy new ram the first thing I do is run memtest for 24 hours.
riofl:
according to several texts the VID is reported by the chip as its nominal operating voltage with stock settings.
i tried VCore all the way to 3.8v .. it ran fine at the lower voltage of 3.68 when i kept the ram set at 1000 with stock timings but i didnt want to bottleneck things so i decided to go down to 3.45ghz which also ran more within my 'comfort range' in cpu temps.
the voltage at 3.0ghz was the 'normal' bios setting and voltages were taken off auto. it ran like that since approximately july 2008 and never locked up.
i agree on the test times .. they should be measured in days, but i cannot be without this machine that long.. i cannot even be without it for more than 2 or 3 hours at most is why i used short tests. if it is going to act up it will do so while i am using it and it is a simple thing to drop it down in minutes if that happens. heck when i switched ram, on customer machines i usually run memtest for a minimum of 24 to 36 hrs, but on mine again due to time constraints, i have found with the way i use the machine if it is gonna mess up it will do it within 2 iterations.
i cant keep this down long enough to do proper 'burn in' etc... and i do not have a 2nd machine that is capable of taking its place while being burned in or repaired, so i just have to keep watch on things as i work and if necessary adjust which takes a few min max. due to ship times and the long times it takes to run into town to buy parts, i have spares of every part in the closet so i can do a fast replacement if need be. only spare i dont have is the tesla. i know i could replace it with the spare 285 but that just doesnt sit right with me. a spare is a spare and if i used it i would have to buy yet another one for a spare.
after i build up a newer workstation for myself, i will keep spares of that one, and will use the old spares in another machine to clone the one i have.
then i will either keep them both or sell off one of them. prob. will keep them both since this one proves to be a decent rac bulder compared to the other machines..
riofl:
forgot.. at 3.45ghz, cpuz reports CoreV to be 1.296. the number i gave in the msg above was the number set in the bios and it also agreed in the bios voltage reading in the 'cpu health' section.
the vcore reading in gkrellm using in0, is 1.31
sunu:
Very nice "policy" about the spares, but very costly...
riofl:
thankfully the boss pays for 50% of the cost of spares and he would have a fit if i told him i used a spare as a 2nd card. he has spares for everything in the office and the NOC.. not for each server but since the servers are clones he has one of each part used in a single computer. doesnt need any more than that really.
i love the spare policy but if i had to foot the bill totally myself i doubt i would have spares of everything, probably just ram and hard drives and fans which are all the most common parts to go.
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