21) Message boards : Number crunching : 6990 stopped crunching on 1 gpu (Message 67420) Posted 2 May 2018 by melk Post: Finally figured this out, setting it to crunch 8 WU was simply too much and caused weird issues. 4 or max 5 per GPU seems to be the best number for me.

22) Message boards : Number crunching : Computation errors using Radeon 6970 (Message 67419) Posted 2 May 2018 by melk Post: Did these errors just start? Any recent changes to your hardware or OS? You can try deleting and re-adding the project maybe? Might need to delete or move the files in your BOINC data directory.

23) Message boards : Number crunching : AMD FirePro S9150 (Message 67407) Posted 25 Apr 2018 by melk Post: I think you may be right about the Invalid tasks. I tried running 8 WU per GPU and got all sorts of whacky behavior so I backed it down to 5 and seems to be much better. Time will tell.

24) Message boards : Number crunching : 80 WU limit (Message 67406) Posted 25 Apr 2018 by melk Post: Maybe it is a hard limit so people do not hog all the WU :) I don't know.

25) Message boards : Number crunching : 80 WU limit (Message 67404) Posted 25 Apr 2018 by melk Post: The max for that range is 10 days. There is also the "plus additional days" setting below it. Do you have enough free disk space?

26) Message boards : Cafe MilkyWay : MilkyWay@Home "standard" and N-Body Simulations (Message 67397) Posted 24 Apr 2018 by melk Post: Interesting. I may have to let some of my CPU's crunch nbody tasks then. I wonder how much that will effect my credits.

27) Message boards : Cafe MilkyWay : Advice needed: GPU computation (Message 67396) Posted 24 Apr 2018 by melk Post: GPU-Z is a very handy utility for displaying stats and utilization of your GPU

28) Message boards : News : New Runs (Message 67395) Posted 24 Apr 2018 by melk Post: Thanks for your hard work and contribution Jake

29) Message boards : Number crunching : AMD FirePro S9150 (Message 67394) Posted 24 Apr 2018 by melk Post: I have attached some 40mm fans to blow through the metal shroud on the card. Loud, but effective. Temps stay below 60c Liquid cooling is great but one thing to look out for when adapting it to GPU is that those adapters typically do not cool the VRM at all. I fried my old GTX 970 after attaching a NZXT Kraken bracket. Cooled the gpu core wonderfully, but one day the card died. Granted the PC was essentially stuffed in a cubby with little to no airflow so that did not help. Point still stands tho, you'll probably want at least a small fan blowing over the VRM's. I'll need to look into the Invalid tasks more. I have been running my Gridcoin wallet on Win 10 from day one, just over a year now. No real issue. There was a rather big update a few months back that greatly optimized the windows client. https://steemit.com/gridcoin/@barton26/gridcoin-developer-update-april-23rd-2018

30) Message boards : Number crunching : Validation inconclusive (Message 67392) Posted 24 Apr 2018 by melk Post: Very interesting! Thanks. Makes sense that it would take another confirmation to validate the results. Next up I'm going to look for more info on what differentiates the n-body WU from the regular one.

31) Message boards : Number crunching : "Maximum CPU % for graphics" (Message 67391) Posted 24 Apr 2018 by melk Post: Ahh ok. I do not use the screensaver either. I will just leave it alone then. Thanks!

32) Message boards : Number crunching : 6990 stopped crunching on 1 gpu (Message 67388) Posted 23 Apr 2018 by melk Post: 6990 is dual-chip card. previously it was working to crunch on both chips, now it uses only 1 even tho boinc sees both. rebooted etc no change. now I'm stumped. 4/23/2018 6:23:43 PM | | Starting BOINC client version 7.8.3 for windows_x86_64 4/23/2018 6:23:43 PM | | log flags: file_xfer, sched_ops, task 4/23/2018 6:23:43 PM | | Libraries: libcurl/7.47.1 OpenSSL/1.0.2g zlib/1.2.8 4/23/2018 6:23:43 PM | | Data directory: C:\ProgramData\BOINC 4/23/2018 6:23:43 PM | | Running under account user 4/23/2018 6:23:45 PM | | CAL: ATI GPU 0: AMD Radeon HD 6900 series (Cayman) (CAL version 1.4.1848, 2048MB, 2016MB available, 6451 GFLOPS peak) 4/23/2018 6:23:45 PM | | CAL: ATI GPU 1: AMD Radeon HD 6900 series (Cayman) (CAL version 1.4.1848, 2048MB, 2016MB available, 6451 GFLOPS peak) 4/23/2018 6:23:45 PM | | OpenCL: AMD/ATI GPU 0: AMD Radeon HD 6900 series (Cayman) (driver version 1800.8 (VM), device version OpenCL 1.2 AMD-APP (1800.8), 2048MB, 2016MB available, 6451 GFLOPS peak) 4/23/2018 6:23:45 PM | | OpenCL: AMD/ATI GPU 1: AMD Radeon HD 6900 series (Cayman) (driver version 1800.8 (VM), device version OpenCL 1.2 AMD-APP (1800.8), 2048MB, 2016MB available, 6451 GFLOPS peak) 4/23/2018 6:23:45 PM | | Host name: i7-2600 4/23/2018 6:23:45 PM | | Processor: 8 GenuineIntel Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz [Family 6 Model 42 Stepping 7] 4/23/2018 6:23:45 PM | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 cx16 sse4_1 sse4_2 popcnt aes syscall nx lm avx vmx smx tm2 pbe 4/23/2018 6:23:45 PM | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00) 4/23/2018 6:23:45 PM | | Memory: 7.96 GB physical, 15.92 GB virtual 4/23/2018 6:23:45 PM | | Disk: 1.82 TB total, 1.78 TB free 4/23/2018 6:23:45 PM | | Local time is UTC -4 hours 4/23/2018 6:23:45 PM | Milkyway@Home | Found app_config.xml 4/23/2018 6:23:45 PM | | Config: use all coprocessors

33) Message boards : Number crunching : Validation inconclusive (Message 67386) Posted 23 Apr 2018 by melk Post: Hi folks, I currently have a lot (2000+) of tasks with Status of: Completed, validation inconclusive. Credit is "pending". Is it normal to have this many inconclusive results? What further validation takes place after this status? What determines if I will/ will not receive credit for these? Thanks!

34) Message boards : Number crunching : "Maximum CPU % for graphics" (Message 67385) Posted 23 Apr 2018 by melk Post: Maximum CPU % for graphics I have never understood this setting in MilkyWay@Home preferences. What the heck does it do? Should I change it? Is it starving my GPU of cpu-time if I run multiple WU on my gpu?

35) Message boards : Number crunching : AMD FirePro S9150 (Message 67384) Posted 23 Apr 2018 by melk Post: I had been running 4 tasks on the card with the same sort of spiky intermittent GPU utilization I've seen on my other cards. Bumped the config to 8 tasks and finally I see nearly 100% consistent utilization with only very periodic drops. Much much better than it was. I will need to update my other cards as well. Interestingly, none seem to report very much VRAM usage at all.

36) Message boards : Number crunching : Titan V (Message 67377) Posted 20 Apr 2018 by melk Post: Yep I got my S9150 for $340 shipped on ebay which works out to $0.13 per GFLOP (@ 10.77 GFLOPS per Watt) TITAN V is $0.40 per GFLOP @ 29.80 GFLOPS per Watt

37) Message boards : Number crunching : n body crawling (Message 67374) Posted 20 Apr 2018 by melk Post: Yeah I retired all my Core 2 Quads. Performance just isn't there for the energy cost. Even first gen Core is getting my stinkeye as I start to consolidate. Moving to Sandy as the bottom cutoff for desktop stuff. Found it's better still to just go multi-socket Xeon. LGA1366 is kinda iffy and is the bottom of what I will even consider. LGA20111 is plentiful and cheap on the used market.

38) Message boards : Number crunching : n body crawling (Message 67372) Posted 20 Apr 2018 by melk Post: Are n-body tasks for CPU? I didn't realize that. I have lots of cpu hosts I can dedicate to it if so.

39) Message boards : Number crunching : Need to know what other projects use the GPU so I can troubleshoot an issue (Message 67362) Posted 19 Apr 2018 by melk Post: You'll want to run a different project on your 970 anyway, as the FP64 performance is very, very low. Asteroids or GPUgrid are likely the two best for Nvidia cards (IMHO of course) Which apps are you using that is reporting the Memory speed difference? GPU-Z? Afterburner?

40) Message boards : Number crunching : New Benchmark Thread - times wanted for any hardware, CPU or GPU, old or new! (Message 67361) Posted 19 Apr 2018 by melk Post: You can pickup used Server-version FirePro cards for under $400 that have strong FP64. S9100/S9150 have the best price/performance ratio. They are around ~2500 gflops. 280X is around 1000 gflops for comparison. I just got my S9150 up and running, paid $340 shipped from ebay. Two things to note with these, they are headless - no video connectors, so compute only. And they are passive, no fans. You'll have to rig up your own cooling. The Workstation-version W8100/W9100 cards offer good FP64 performance and include video outputs and built-in cooling fan, but are significantly more expensive. ~$1000 and way, way up. The older 8000/9000 series do not offer competitive gflops per watt (3.5 vs 9.5 for the 91xx and 10.7 for the 9150 specifically) For Nvidia the original Titan, Titan Black and dual-gpu Titan Z all offer strong FP64 at a favorable GFLOPS per Watt (6.0, 6.6, 7.2) 6990 gflop/watt is 3.4 7990 gflop/watt is 5.0 7970 gflop/watt is 3.7 280X gflop/watt is 4.1 This of course is all dependent on your specific clockspeeds, any thermal throttling, etc. But a useful reference point anyway. I have been compiling a spreadsheet and will share it here later. (No googledocs access at work)

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