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About Vortac

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  • Birthday 08/01/1974

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  1. Milkyway@home

    Things have indeed changed a lot, competition is a lot tougher now. A single 280X might yield 9-10 GRC per day now (in Milkyway@home).
  2. Hey guys, thanks for reading my stuff, glad to be of help. Indeed, if you are looking for best "mag for bucks" ratio, crunching Milkyway@home with some old Radeons is probably still the best way to go. HD7970 are still no.1 there for FP64 and they are quite cheap, if you can find them (eBay etc). Other than that, if you are going the FP32 way, looks like Nvidia GTX 1060/1070s are still the best buy.
  3. Support Gridcoin Joint Marketing Initiative for the next year! https://steemit.com/gridcoin/@vortac/gridcoin-joint-marketing-initiative-2018
  4. I am going to vote for Rob's proposal. I think it's the most complete proposal we currently have. It's not perfect, but as Quez says, a good plan now is better than a perfect plan next year. However, this discussion is very technical and many community members are probably reluctant to voice their opinions, since they don't fully understand all the details. Not to mention that CCT, which was our main channel of communication not so long ago, has become less important today, with Slack, Discord, Steemit and other platforms which are now available.
  5. HD6970 has 2.7 TFLOPS in FP32 (Collatz) and 0.6 TFLOPS in FP64 (Milkyway). Most likely, it will yield more GRC in Collatz, but not a big difference, 0.6 TFLOPS is more than enough for Milkyway too.
  6. Milkyway@home

    Yes, original Titans have better FP64 performance on paper, but for Milkyway@home, users reported worse performance than with HD7970: http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=4171 Similar thing with FirePro cards. In this very thread (page 2), user boristsybin reported FirePro W8100 (top host #9) having roughly equal performance in Milkyway as HD7970, although specs for W8100 show 2.1 TFLOPS in FP64.
  7. Milkyway@home

    Nvidia Kepler and Maxwell GPUs have FP64 performance capped at 1/24 and 1/32 respectively, they are an absolutely disastrous choice for Milkyway@home. Hawaii GPUs are capped at 1/8 - better, but still far worse than Tahitis (which are 1/4). Original TITAN and TITAN Black GPUs have very good FP64 performance (at least on paper) but they still perform worse than Tahitis (OpenCL issues of some kind, most likely). Only one glance at http://milkyway.cs.rpi.edu/milkyway/top_hosts.php will tell you that Titan, Kepler, Maxwell and Hawaii based cards are nowhere to be seen.
  8. Milkyway@home

    Well, Gridcoin was indeed worth approximately 5 times more at the peak in June :) Other than waiting for the next peak, there's not much more that you can do. Pool feels are very small, switching to solo makes very little difference.
  9. Milkyway@home

    Checked your host, I think you are doing OK, 30-35 GRC daily is an expected payout with your RAC. Of course, it's a little bit disappointing seeing those FirePros behind 7970s, but professional GPUs are often underutilized with BOINC apps. Users reported similar situation with Titan Blacks: http://milkyway.cs.rpi.edu/milkyway/forum_thread.php?id=4171
  10. Milkyway@home

    Looking at those numbers, I would say that host 736335 is most likely running 6 tasks in parallel. All top hosts are running many tasks on one GPU, in order to increase BOINC output and earn more BOINC credits. For more details, you can study this Steemit article (look under 3. Run multiple BOINC tasks per GPU): https://steemit.com/gridcoin/@vortac/gridcoin-gpu-mining-6-obtaining-the-maximum-performance-out-of-your-gpus
  11. Milkyway@home

    Professional GPUs usually require professional applications to obtain max performance. I guess that Milkyway developers haven't added any optimizations for professional GPUs, since they aren't really used for BOINC that often. Generally, if one wants best BOINC performance, safest course of action is to buy hardware which is used by most productive machines on the Top Hosts list. For Milkyway, that's still 7970 (and was for many other BOINC projects few years ago).
  12. Milkyway@home

    It's the usual Monday maintenance. Back to normal in an hour or two.
  13. Milkyway@home

    1. Top hosts run 24/7, no doubt. In addition to that, they probably run three or four tasks in parallel on every GPU. So, every 130 seconds, they complete at least THREE tasks. 7970 can complete a single task in about 30 secs. 2. True, Titan has better FP64 performance, at least on paper. However, Titans are not visible on the top hosts list. My guess is that Nvidia's implementation of OpenCL is less optimized and that 7970s are yielding better performance in the end, despite lower FP64 specs. 3. There is no simple online calculator, because BOINC computations are much more complex than the usual crypto-mining. Milkyway is a particularly good example, with older cards yielding better performance, something unheard of in the world of Proof-of-Work hashing. From my experience, a single 7970 can achieve RAC of 600k. That's good enough for 230 magnitude or about 40 GRC per day.
  14. Milkyway@home

    1. Upgrading to Titan is not worth it. You can upgrade to HD7970 at a much smaller cost for equal performance or nearly so. 2. Those hosts you are pointing out, they are probably running three or four tasks in parallel. So their average runtimes are longer, but overall output is higher of course. 3. Modern consumer cards all have very weak FP64 performance, only professional cards get such niceties today. That's why 7970s or even 5870s and 5850s are better choice for Milkyway than a new shiny GTX 1080.

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