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Profilearkayn
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Message 55804 - Posted: 15 Oct 2012, 11:26:29 UTC

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MBark

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Message 55824 - Posted: 16 Oct 2012, 4:44:30 UTC - in response to Message 55804.  


Ok, thanks arkayn; the info is appreciated. I'll try the 11.9 when I get some time in the next few days. Max
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Message 56034 - Posted: 31 Oct 2012, 21:14:53 UTC

Hi all,

I'm just going to ask since I don't think it's been brought up already. What happens if your system does NOT have a GPU with the double precision extension?

I ask because, I don't believe I do since I'm sporting an ATI Mobility Radeon 5850 HD which does not list the double precision extension in its specs.


http://www.amd.com/us/products/notebook/graphics/ati-mobility-hd-5800/Pages/hd-5850-specs.aspx

That said, I have been running Milkway@home on this machine, and it seems to be working about as well as the other projects Rosetta & SETI@home. I do get a warning now and again that I am lacking the extension. In fact, this project has my highest average credit of the three projects and resources are allocated evenly.

Does the project just run a lot slower? When I read these posts about the requirement of the DP extension is sounds like I shouldn't be able to participate at all.

Thanks for clearing this up.

-G

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robertmiles

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Message 56035 - Posted: 31 Oct 2012, 21:32:02 UTC - in response to Message 56034.  
Last modified: 31 Oct 2012, 21:36:33 UTC

If you do not have double precision in your GPU, the Milkyway@Home GPU workunits will not run. Only CPU workunits with run on that computer. See the first post in this forum.

However, I believe that one of the AMD GPUs has double precision, but little enough that they decided not to list it. Your GPU may be one of those, and therefore able to run Milkyway@Home workunits, but slower than those with more double precision capability.
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Message 56036 - Posted: 31 Oct 2012, 22:15:09 UTC
Last modified: 31 Oct 2012, 22:15:35 UTC

HD5850M and HD5850 are two different cards. Your card will not run MW but it will do fine with Collatz.
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Message 56043 - Posted: 1 Nov 2012, 13:55:22 UTC - in response to Message 56035.  
Last modified: 1 Nov 2012, 13:56:41 UTC

If you do not have double precision in your GPU, the Milkyway@Home GPU workunits will not run. Only CPU workunits with run on that computer. See the first post in this forum.

However, I believe that one of the AMD GPUs has double precision, but little enough that they decided not to list it. Your GPU may be one of those, and therefore able to run Milkyway@Home workunits, but slower than those with more double precision capability.



The first post in this forum does not specifically state what you claim. It says that DP is required to participate. Which is not the same thing as what you are stating; which is why I asked for clarification as to what was ocurring on my system. Thank you for the rest of your post.

Thank you Swiftmallard for your post, I did know the difference between the two cards but had not heard of Collatz. I'll take a look.

Best All,
-G
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swiftmallard
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Message 56047 - Posted: 1 Nov 2012, 19:54:17 UTC - in response to Message 56043.  

The first post in this forum does not specifically state what you claim. It says that DP is required to participate. Which is not the same thing as what you are stating; which is why I asked for clarification as to what was ocurring on my system. Thank you for the rest of your post.

Double precision is required to participate in MilkyWay@home, whether you crunch with your CPU or GPU. It is my understanding that all current CPUs are DP capable. If your GPU is too, then you can crunch separation WUs faster if you choose to use it.
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John Clark

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Message 56048 - Posted: 1 Nov 2012, 20:37:24 UTC

Has there been any problems on Milkyway using AMD HD7970 and HD7950 cards? Other projects hve had problems, leaving crunching to older series of ATI GPUs?
Go away, I was asleep


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Message 56052 - Posted: 1 Nov 2012, 22:51:22 UTC - in response to Message 56048.  

John,

I have 3 Gigabyte AMD HD7950s crunching between Milkyway and Einstein. I run Win 7 Pro and Ultimate 64 bit systems, BOINC 7.0.28, and Catalyst 12.6. Performance on both Projects is great. The DP on the 79xx series can't be beat. I don't overclock and run a single task per GPU for stabiilty and to keep system heat down. The HD 7950s will complete a single 1.02 OpenCL task in less than 40 secs.

Joe
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Message 56053 - Posted: 2 Nov 2012, 11:39:41 UTC - in response to Message 56043.  

Thank you Swiftmallard for your post, I did know the difference between the two cards but had not heard of Collatz. I'll take a look.
Best All,
-G


Moo is another project that should work with your card, there are several others too.
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John Clark

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Message 56054 - Posted: 2 Nov 2012, 12:19:38 UTC

Good to hear, JH.

From sight of an old colleague, Zydor, several months ago he ran 2 x 6 core AMD based PCs. One had 2 AMD HD5970 cards (= to 4 x HD5850) and the other has 2 x HD7970s. The output of the 2 x 7970s was close to the 2 x HD5970 (or 4 x HD5850s).

Very powerful, but reports from some projects suggested an upgrade might lead to "No Work" ...
Go away, I was asleep


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Message 56074 - Posted: 4 Nov 2012, 1:05:15 UTC

I didn't understand why my 6700 Radeon HD don't work with this project... I'm tired of Collatz Conjecture, so i want to participate to Milkyway but my processor isn't fast enough..

Can "you" (admins programmers, ...) fix this or not ? :D
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JHMarshall

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Message 56075 - Posted: 4 Nov 2012, 2:18:50 UTC - in response to Message 56074.  

Michel,

MW requires Double Precision arithmetic. The HD 67xx series doesn't support DP.

Joe
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John Clark

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Message 56083 - Posted: 4 Nov 2012, 13:22:43 UTC - in response to Message 56075.  

Michel,

MW requires Double Precision arithmetic. The HD 67xx series doesn't support DP.

Joe


I can confirm this.

The 6xxxx series cards that do support DP are limited to the 6970 and 6950, and the same for the 7xxx series GPUs.
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Message 56089 - Posted: 4 Nov 2012, 15:49:38 UTC - in response to Message 56083.  

Michel,

MW requires Double Precision arithmetic. The HD 67xx series doesn't support DP.

Joe


I can confirm this.

The 6xxxx series cards that do support DP are limited to the 6970 and 6950, and the same for the 7xxx series GPUs.


Not quite correct, the 7750, 7770, 7850 & 7870 all support DP. Just at 1/16th the single precision rate.
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Message 56104 - Posted: 5 Nov 2012, 13:33:18 UTC - in response to Message 56074.  

I didn't understand why my 6700 Radeon HD don't work with this project... I'm tired of Collatz Conjecture, so i want to participate to Milkyway but my processor isn't fast enough..

Can "you" (admins programmers, ...) fix this or not ? :D


There are PLENTY of other Boinc Projects that would love to have your gpu helping them! A SHORT list is Moo, Einstein, Poem, World Community Grid and its Help Conquer Cancer Project, Prime Grid, DistRTgen, Seti. And remember MilkyWay can always use your cpu time if that is all you have available.
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Message 56205 - Posted: 15 Nov 2012, 19:09:40 UTC

I have an Nvidia GTX650 Ti and it's running a GPU task just fine. Is it possible to run multiple instances of MilkyWay@Home 1.2 (Opend_nvidia) like I can on Seti?

Nick
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Message 56206 - Posted: 15 Nov 2012, 19:27:20 UTC - in response to Message 56205.  

No need for anyone to respond. I found the answer on another thread.
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Message 56271 - Posted: 22 Nov 2012, 15:55:28 UTC

Heya,

here's for comparison:


i7 3770K @ 4.6GHz (HT on)

~4 WU / hour


2x AMD 7970

~120 WU / hour


Are the CPU and GPU tasks identical?

Best, B
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Message 56643 - Posted: 26 Dec 2012, 22:31:19 UTC

I have several GT 680 but they are not running on MW now? I have down loaded the work and the cards are good but there is no crunching. Does MW support GT 640?
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Message boards : Number crunching : GPU Requirements

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