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World Community Grid Forums
Category: Completed Research
Forum: Help Conquer Cancer
Thread: HCC GPU APP HAS LAUNCHED. |
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Thread Status: Active Total posts in this thread: 363
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges: 
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Disregard, figured it out.
Crunching for humanity since 2007!
---------------------------------------- [Edit 1 times, last edit by Bearcat at Oct 17, 2012 2:07:12 PM] |
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Ingleside
Veteran Cruncher Norway Joined: Nov 19, 2005 Post Count: 974 Status: Offline Project Badges: 
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Looking at the specs on AMD, comparing the 7850 and 7950, doesn't show the 7850 as a double precision card. The 7850 is double precision floating point but not double precision compute power. It doesn't matter for HCC, but anyway... Both cards can do double-precision floating-point calculations, but Amd probably doesn't advertice this much on the 78xx-series of cards since they're so weak doing it. All 77xx and 78xx-series of cards has double-precision, but it's only 1/16 of their single-precision performance, so it's very inefficient to run projects like Milkyway on these GPU's. The 79xx-series of cards as a comparison is 1/4 of single-precision, meaning a 7950 is more than 4x faster on double-precision than 7870. The 69xx-cards also is 1/4 of single-precision, while 58xx and 59xx is 1/5 of single-precision. All other Amd-cards like 68xx, 76xx and so on has no double-precision. BTW, just to include Nvidia, while their $$$$ Tesla-cards has 1/2 of single-precision, the consumer-cards is another story. The 5xx-cards is 1/12 of single-precision, while 6xx is 1/24 of single-precision.  . "I make so many mistakes. But then just think of all the mistakes I don't make, although I might." |
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mmstick
Senior Cruncher Joined: Aug 19, 2010 Post Count: 151 Status: Offline Project Badges: 
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ok for some organisational reasons i will buy now a 7950 to get the max out from a single pci2.0 x16 and 300 Euro the 4x slot will take the 4850 from another pc still for MW then, because this need not much pcie bandwith and the other PC that hold the 4850 until now, is a quad too, so i can bring a second PC back again to poem with a nvidia card. :) and some more gpu "rochades?" are possible too then :) I will post kernel times then :) (when someone tells me where i can read them ;) Kernel times doesn't matter since 7950 is more powerful than you can feed with one work unit, a 7950 can easily knock out 4 work units per minute, at least mine can using an app_info.xml that allows me to run 8 work units simultaneously since I have 8 cores. Another user said using 8 work units causes invalids but I haven't experienced that. Note to the people: If you get invalids decrease your memory frequency/increase memory voltage. Although you may be able to run 1700MHz memory for typical gaming graphics, graphics isn't too picky about slight errors in VRAM, but this project is very picky about it. I noticed I had to reduce my memory frequency to 1400MHz to stop the invalid results I was getting before. Another note: If you have a lot of graphics cards, or have powerful graphics cards, you better have really high frequency system memory in as many channels as you can get, can help a lot to feed the graphics card. |
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Sabrina Tarson
Advanced Cruncher United States Joined: Jun 27, 2012 Post Count: 149 Status: Offline Project Badges:
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Looking at the specs on AMD, comparing the 7850 and 7950, doesn't show the 7850 as a double precision card. The 7850 is double precision floating point but not double precision compute power. http://www.amd.com/us/products/desktop/graphi...Pages/radeon-7850.aspx#/3 http://www.amd.com/us/products/desktop/graphi...Pages/radeon-7950.aspx#/3 Ah, whats the difference? |
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dskagcommunity
Senior Cruncher Austria Joined: May 10, 2011 Post Count: 219 Status: Offline Project Badges:
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Oh man -_- i installed the saphire 7950 card but in gpuz it shows no shadervalues etc. BOINC say too there is no usable gpu found
----------------------------------------:( tried 12.8 (from web) and 12.4 (from cd) both the same result :/ Wonder whats the problem :/ |
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Tapiot
Cruncher Joined: Dec 8, 2009 Post Count: 15 Status: Offline |
Hey. I have the same computer gtx 650 and Radeon 7950 graphics card. How I can put a gtx 650 graphics card to calculate just gpugrid.net project and radeon graphics card just world community grid program (HCC). Now Nvidia graphics card run World Community Grid and boinc ask work to ati card very rarely.
Example now: I have 70 Nvidia tasks from HCC but no one ati tasks from HCC. Radeon is now idle but boinc do not ask work for ati. How to disable Nvidia gpu from HCC? |
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Jim1348
Veteran Cruncher USA Joined: Jul 13, 2009 Post Count: 1066 Status: Offline Project Badges:
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No, HD 7770 = 68.5 seconds kernel time HD 7950 = 33 seconds kernel time HD 7770 1 task in 2 minutes HD 7970 4 tasks 2 minutes You do the math.  nanoprobe, I am pretty sure that you are a knowledgeable cruncher who knows the difference between CPU time and GPU time, and so recommend that you re-read the previous posts. |
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Ingleside
Veteran Cruncher Norway Joined: Nov 19, 2005 Post Count: 974 Status: Offline Project Badges:
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Hey. I have the same computer gtx 650 and Radeon 7950 graphics card. How I can put a gtx 650 graphics card to calculate just gpugrid.net project and radeon graphics card just world community grid program (HCC). Now Nvidia graphics card run World Community Grid and boinc ask work to ati card very rarely. Example now: I have 70 Nvidia tasks from HCC but no one ati tasks from HCC. Radeon is now idle but boinc do not ask work for ati. How to disable Nvidia gpu from HCC? You'll need to run BOINC v7.xx for this to work. Edit, or make a cc_config.xml file if not already present, and include an option called <exclude_gpu>. The syntax is like this: In the <exclude_gpu>-part, everything except <url> is optional. So, to exclude Nvidia to use WCG, would expect something like this will work: <cc_config>Note, I've not tested it, so... Since GPUGRID doesn't have any usable Amd-application, you don't need to exclude this project. "I make so many mistakes. But then just think of all the mistakes I don't make, although I might." [Edit 1 times, last edit by Ingleside at Oct 17, 2012 2:21:37 PM] |
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mmstick
Senior Cruncher Joined: Aug 19, 2010 Post Count: 151 Status: Offline Project Badges:
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No, HD 7770 = 68.5 seconds kernel time HD 7950 = 33 seconds kernel time HD 7770 1 task in 2 minutes HD 7970 4 tasks 2 minutes You do the math. nanoprobe, I am pretty sure that you are a knowledgeable cruncher who knows the difference between CPU time and GPU time, and so recommend that you re-read the previous posts. These aren't measures of CPU time, I recommend you reread previous posts. His measures are the same as mine, this is the average time per completed work unit. Running 8 work units simultaneously, I am currently achieving a rate of 30 seconds per work unit. We are watching our boinc manager and measuring the elapsed time, not something as superficial and unreliable as GPU kernel time, rofl. Since I run 8 work units I calculate 32 elapsed times and average that, which turns out to be ~30 seconds to complete a single work unit. Changing your graphics card isn't going to magically change your CPU time, these are measures of both GPU+CPU. |
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mmstick
Senior Cruncher Joined: Aug 19, 2010 Post Count: 151 Status: Offline Project Badges:
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Oh man -_- i installed the saphire 7950 card but in gpuz it shows no shadervalues etc. BOINC say too there is no usable gpu found :( tried 12.8 (from web) and 12.4 (from cd) both the same result :/ Wonder whats the problem :/ Not enough information, you have a monitor connected to this card? |
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