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Category: Support
Forum: Website Support
Thread: Should I start 4 or 8 tasks for an AMD 8-core CPU? |
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Thread Status: Active Total posts in this thread: 12
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farta
Cruncher Joined: Aug 2, 2009 Post Count: 7 Status: Offline Project Badges: 
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I'm about to buy an AMD 8-core CPU (FX-8350). It only has 4 floating point calculating unit. So if the tasks are mainly floating point task, I'll start 4 tasks. Otherwise 8 tasks. Does anyone have any idea? I guess it is floating tasks, but I'm not sure.
Projects I'm running is FightAIDS@Home, Outsmart Ebola Together & Mapping Cancer Markers. Thanks a lot for any advise. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I am not a technical expert on AMD CPU cores but why would you want to use only half your processing power?
Set to default (max output) WCG will use all 8 CPU cores, I would not worry about the fact that each pair of cores shares one FPU - let the hardware do its job! |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Consider cost of ownership, rather than upfront pricing. The TDP differential with the frequently compared I7-4770 is substantial, where the Intel is giving a 58% better performance according one of the reviews: http://www.cpu-world.com/Compare/451/AMD_FX-S...tel_Core_i7_i7-4770K.html
To tell it in short, the payback just in electricity cost was 18 months, crunching on 8 cores, 24/7. And for points, a member was kind enough to post a credit comparison list ran at one project. 8350 = 24.15 GFlops (8 cores) 4770K = 36.93 GLops (8 cores) Telling :D |
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Falconet
Master Cruncher Portugal Joined: Mar 9, 2009 Post Count: 3295 Status: Offline Project Badges: 
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You could also wait until next year for the AMD Zen CPU's/APU's instead of buying the FX-8350
----------------------------------------Some interesting things have been coming out (not official) http://wccftech.com/amd-x86-zen-based-highper...igpu-ddr4-memory-support/ http://wccftech.com/amd-zen-x86-quad-core-unit-block-diagram/ http://wccftech.com/amd-zen-cpu-core-block/ Maybe on May 6th we will have more info. AMD Ryzen 5 1600AF 6C/12T 3.2 GHz - 85W AMD Ryzen 5 2500U 4C/8T 2.0 GHz - 28W AMD Ryzen 7 7730U 8C/16T 3.0 GHz |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1672 Status: Offline Project Badges: 
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On my side I operate two Phenom II x6 which do not share floating point unit between the cores. The 1055T at 2.8 GHz (no OC) brings the same performance to WCG than the i7 4770K at 3.5 GHz.
----------------------------------------The 1090T at 3.2 GHz performs even 20% better than the i7 4770K. I did not understand why AMD did not improve and extend the Phenom II architecture instead of delivering the FX with some significant limitations. Cheers, Yves |
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Falconet
Master Cruncher Portugal Joined: Mar 9, 2009 Post Count: 3295 Status: Offline Project Badges:
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KerSamson,
----------------------------------------How much power are those Phenom II systems consuming? AMD Ryzen 5 1600AF 6C/12T 3.2 GHz - 85W AMD Ryzen 5 2500U 4C/8T 2.0 GHz - 28W AMD Ryzen 7 7730U 8C/16T 3.0 GHz |
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Falconet
Master Cruncher Portugal Joined: Mar 9, 2009 Post Count: 3295 Status: Offline Project Badges:
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Farta - http://wccftech.com/amd-2016-14nm-cpu-apu-zen-k12-product-roadmap-leaked/
----------------------------------------If you are willing to holdoff that FX purchase, the new AMD CPU's/APU's launching next year will be far better than the current FX line. AMD Ryzen 5 1600AF 6C/12T 3.2 GHz - 85W AMD Ryzen 5 2500U 4C/8T 2.0 GHz - 28W AMD Ryzen 7 7730U 8C/16T 3.0 GHz |
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retsof
Former Community Advisor USA Joined: Jul 31, 2005 Post Count: 6824 Status: Offline Project Badges: 
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Farta - http://wccftech.com/amd-2016-14nm-cpu-apu-zen-k12-product-roadmap-leaked/ If you are willing to holdoff that FX purchase, the new AMD CPU's/APU's launching next year will be far better than the current FX line. true, depending on how long it takes to get into production and the market. I was reading that same article, which says that Zen will be in 4 thread chunks. My 6 core AMD is running fine at 100%. HP HPE computers have industrial strength components, the best I have ever had, and it is not pooping out. My wife has an even newer HP HPE 8 core AMD, but it is unavailable for this purpose.   A new Intel I7 4770 (not 4770 high end K) 4 core 8 thread is running well also at 100%. It was a refurbished closeout from Fry's, and also an HP HPE. Their new line is HP Envy, or HP Envy Phoenix for gaming. Fry's doesn't sell them and I notice that other places are out of stock. I don't know what's going on with HP. They were thinking of getting out of the market, but I think the last rumor is that they are still in it. An old computer died, so I needed something fast.
SUPPORT ADVISOR
----------------------------------------Work+GPU i7 8700 12threads School i7 4770 8threads Default+GPU Ryzen 7 3700X 16threads Ryzen 7 3800X 16 threads Ryzen 9 3900X 24threads Home i7 3540M 4threads50% [Edit 3 times, last edit by retsof at Apr 30, 2015 3:48:03 PM] |
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retsof
Former Community Advisor USA Joined: Jul 31, 2005 Post Count: 6824 Status: Offline Project Badges:
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I'm about to buy an AMD 8-core CPU (FX-8350). It only has 4 floating point calculating unit. So if the tasks are mainly floating point task, I'll start 4 tasks. Otherwise 8 tasks. Does anyone have any idea? I guess it is floating tasks, but I'm not sure. Projects I'm running is FightAIDS@Home, Outsmart Ebola Together & Mapping Cancer Markers. Thanks a lot for any advise. FightAids@Home is at 98% completion, so I would keep it busy if you are close to a badge. OET is new and should have 4 years of life. I wouldn't worry too much. The only concern might be to watch your core temperatures at 100% and add a case fan if it is running too hot. I have to dust the cat fur out of mine now and then. The other Intel I7 4770 also shares floating point, but I filled it up and it is spitting out units. I don't think I would waste the computer at 50%. I'm sure that the people that design instructions allow for this. While something is crunching, the other side is doing something else it needed to do. There would be a lot of complaints if everybody had a 50% hangup when they paid for 8 threads.
SUPPORT ADVISOR
----------------------------------------Work+GPU i7 8700 12threads School i7 4770 8threads Default+GPU Ryzen 7 3700X 16threads Ryzen 7 3800X 16 threads Ryzen 9 3900X 24threads Home i7 3540M 4threads50% [Edit 6 times, last edit by retsof at Apr 30, 2015 3:50:11 PM] |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1672 Status: Offline Project Badges:
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How much power are those Phenom II systems consuming? Hi Falconet, I do not have power measurements available. However comparing to the Q6600 and Q9450, the both Phenom II x6 use less electricity power. The core temperatures stay on a reasonable level:
The i7 stays in a similar range. Nevertheless, end 2010, the price difference between i7 and Phenom II x6 was more than significant for both CPU and mainboard as well. I ran the system on SSD over 4 years long, I've just switched back to HDD by upgrading to Ubuntu 14.04 because I was a little bit concerned by the SSD health state after 4 years, operating Ubuntu 10.04, crunching 100% (24/7/365) including CEP1 and CEP2. Cheers, Yves |
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