Posts by merle van osdol
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1) Message boards : Number crunching : amd radeon 6570 - I must have the wrong driver! (Message 20179)
Posted 1104 days ago by merle van osdol
I can't get my 6570 to work with collatz. I am pretty sure I have the wrong driver. It is the lastest one and I even tried their newest beta. Does someone know what driver I should be using and perhaps even a link to the correct driver? Thanks

--edit--
I changed my preferences to only include CAL and it seems to work. I deleted that "brooks" item.
2) Message boards : Science : Suggestion : Use sieve to speed up (Message 19898)
Posted 1212 days ago by merle van osdol
Great and thanks for your reply.
3) Message boards : Science : Suggestion : Use sieve to speed up (Message 19889)
Posted 1213 days ago by merle van osdol
This was a very interesting discussion but nothing has been posted recently.
Are you still working on this or another optimization?
Thanks
4) Message boards : Number crunching : Collatz using only 80% of my gpu's (Message 19844)
Posted 1232 days ago by merle van osdol
Thanks mikey

Now its in the mid to upper 90's!
5) Message boards : Number crunching : Collatz using only 80% of my gpu's (Message 19842)
Posted 1232 days ago by merle van osdol
Yes
6) Message boards : Number crunching : Collatz using only 80% of my gpu's (Message 19840)
Posted 1232 days ago by merle van osdol
I have an amd 7770 and an r7 265. Both cards use only 80% of their capacity with Collatz large and solo. Is there some setting I can use in app_config to raise these percentages a bit higher? I am using boinc 7.0.64 and need to continue with that version.
7) Message boards : Number crunching : Cuda threadsafe exit code (Message 13018)
Posted 2249 days ago by merle van osdol
Usually when I suspend my boinc apps, my current collatz wu goes back to its start. It does not always happen though. What am I missing? Hope this is the correct thread?
8) Message boards : Number crunching : "newbie" questions (Message 5723)
Posted 2923 days ago by merle van osdol
My new MB has 3 slots for gpu's: 1 x16, 1 x16 and a third at x4. Does that mean that my third card will only perform at 1/4 of it's normal power when I'm using a double crossfireX?


EDIT:
I read in one outside posting that for ati x16 yields 100%, x8 yields 98% and x4 yields 85%
9) Message boards : Number crunching : "newbie" questions (Message 5664)
Posted 2925 days ago by merle van osdol
My new MB has 3 slots for gpu's: 1 x16, 1 x16 and a third at x4. Does that mean that my third card will only perform at 1/4 of it's normal power when I'm using a double crossfireX?

EDIT: My MB is an asrock x58 extreme and the cards are hd4850's which the documentation says is the newest card it supports.
10) Message boards : Number crunching : "newbie" questions (Message 5650)
Posted 2925 days ago by merle van osdol
My new MB has 3 slots for gpu's: 1 x16, 1 x16 and a third at x4. Does that mean that my third card will only perform at 1/4 of it's normal power when I'm using a double crossfireX?
11) Message boards : Number crunching : "newbie" questions (Message 5415)
Posted 2936 days ago by merle van osdol
Many thanks Gipsel. That'll be my direction then. By identical cards I presume you mean 2- 4670's or 2- 4890's, etc.
12) Message boards : Number crunching : "newbie" questions (Message 5403)
Posted 2936 days ago by merle van osdol
I have started to build my first PC. I want to have 2 ati's for use with
collatz or other projects. Should I/Must I use crossfire? If not I have heard that you need a dummy plug for the second video card. Can you just buy a dummy plug? Any suggestions appreciated.
13) Message boards : Number crunching : "newbie" questions (Message 4959)
Posted 2945 days ago by merle van osdol
Gulp! Sorry! But thanks.
14) Message boards : Number crunching : "newbie" questions (Message 4947)
Posted 2945 days ago by merle van osdol
Can I set Collatz so that I only get gpu work and not cpu work. I have effectively been doing that but have to keep aborting my sse's.
p.s. merry christmas and new years too.
15) Message boards : Number crunching : "newbie" questions (Message 4649)
Posted 2955 days ago by merle van osdol
Thanks Gipsel and Hurray for your work!
16) Message boards : Number crunching : "newbie" questions (Message 4644)
Posted 2955 days ago by merle van osdol
Can we use the stock app with 2 gpu's (ati) or do we need to get into the opti stuff?
17) Message boards : Number crunching : "newbie" questions (Message 4594)
Posted 2958 days ago by merle van osdol
I have never been a member of a team before. If you are a member of a team does that mean that you don't have/get your own individual stats or do you have both? How does that work exactly?
SECOND NEWBIE QUESTION: From time to time I get "inconclusive" in my pending tasks. Later they disappear but do not show up in invalid or error. Does that mean I don't have to worry about my box producing errors? If they were my problem wouldn't they show up later under invalid/error?


You may join whatever team you want. You get the credits AND your team gets the credits.

Inconslusive are normally not an issue. Usually they are due to a GPU or CPU being overclocked to the point that it doesn't match the results of the wingman. That's the whole purpose of requiring a quota of 2 matching results. If your computer says X has Y steps and another computer says Z has W steps. Something is wrong and the workunit is sent to a third person. If his (or her) results match with yours, you get credit. If they match with the other persons, then they get credit and you don't. If yours end up as valid, there is nothing to worry about. If yours end up as invalid, then either there is a problem on your end (probable) or there is a problem with the application (less probable, since tens of thousands of results are submitted daily, but still, not an impossibility). If you are getting lots of results that end up as invalid that you believe should be valid, please let us know. When in doubt, ask. It can't hurt. We'd rather err on the side of caution that pretend the applications are perfect and end up with flawed data.

OK thats good news I don't have any invalid - thanks again.
18) Message boards : Number crunching : "newbie" questions (Message 4583)
Posted 2958 days ago by merle van osdol
I have never been a member of a team before. If you are a member of a team does that mean that you don't have/get your own individual stats or do you have both? How does that work exactly?
SECOND NEWBIE QUESTION: From time to time I get "inconclusive" in my pending tasks. Later they disappear but do not show up in invalid or error. Does that mean I don't have to worry about my box producing errors? If they were my problem wouldn't they show up later under invalid/error?
19) Message boards : Number crunching : "newbie" questions (Message 4524)
Posted 2960 days ago by merle van osdol
Thanks gary. I learning little by little.
20) Message boards : Number crunching : "newbie" questions (Message 4519)
Posted 2961 days ago by merle van osdol

Does each work unit contain a definite number of Collatz "candidates"?


Yes and no. For the 200 billion numbers that each workunit checks, it returns the total steps from all of them as well as the number that had the highest steps and the number of those steps. (If there is a tie for the highest steps, the smaller of the numbers is returned.) So, it doesn't really return candidates. A true candidate would be a number that has an infinite number of steps. That is why overflow checking is done. If there are too many steps or if 192 bits are not enough to store the number, we will know about it. All validation done on the server uses the GMP libarary which, while slower, makes sure that there isn't a bug in the collatz code and doesn't suffer from 192 bit limitations. So, in a sense, when there is no quorum because every workunit failed because of an overflow, and if the number also fails when checked via GMP, then it could be a candidate to disprove the Collatz Conjecture. [/quote]

Slicker did you mean 200 million numbers per workunit? It's hard to imagine that
so much could be reported back as results in only 274 bytes.


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