| Index | Recent Threads | Unanswered Threads | Who's Active | Guidelines | Search |
 |
World Community Grid Forums
Category: Active Research
Forum: Mapping Cancer Markers Forum
Thread: Same CPU power but different time to elaborate WUs |
| No member browsing this thread |
|
Thread Status: Active Total posts in this thread: 13
|
|
| Author |
|
|
Alessio Susi
Cruncher Italy Joined: Mar 7, 2015 Post Count: 17 Status: Offline Project Badges: 
|
Hi. I have two PCs with different CPUs:
----------------------------------------Intel i5-4690k (4800 / 16100 millions operations per second) AMD Ryzen 7 1700 (4550 / 16100 millions operations per second) The first take about 2.5 - 3 hours to complete a task, the second 3.5 - 4.5 hours. What is the reason of this difference?
ASUS X570 E-Gaming
AMD Ryzen 9 3950X, 16 core / 32 thread 4.4 GHz AMD Radeon Sapphire RX 480 4GB Nitro+ Nvidia GTX 1080 Ti Gaming X Trio 4x16 GB Corsair Vengeance RGB 3466 MHz  |
||
|
|
SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
Varying Target and Non-Determinism
|
||
|
|
Alessio Susi
Cruncher Italy Joined: Mar 7, 2015 Post Count: 17 Status: Offline Project Badges:
|
Edit:
----------------------------------------The PC with the Intel processor works at 50% of CPU power, so with 2 of 4 cores The PC with the Ryzen processor works at 88%, so with 14 of 16 cores.
ASUS X570 E-Gaming
AMD Ryzen 9 3950X, 16 core / 32 thread 4.4 GHz AMD Radeon Sapphire RX 480 4GB Nitro+ Nvidia GTX 1080 Ti Gaming X Trio 4x16 GB Corsair Vengeance RGB 3466 MHz |
||
|
|
KLiK
Master Cruncher Croatia Joined: Nov 13, 2006 Post Count: 3108 Status: Offline Project Badges: 
|
There are so many reasons why it can be that?
----------------------------------------- North bridge flaw of data - CPU cache size (L1 - L3) - using HT or not - FSB & RAM speed not to mention software: - is it the same system? - both x64 OS? - use of programs on the system? - use of GPU or BOINC GPU apps? - Update OS in those days... etc. ;) |
||
|
|
imakuni
Advanced Cruncher Joined: Jun 11, 2009 Post Count: 105 Status: Offline Project Badges:
|
Edit: The PC with the Intel processor works at 50% of CPU power, so with 2 of 4 cores The PC with the Ryzen processor works at 88%, so with 14 of 16 cores. This kinda explains it. See, your i5 is using a single physical core for each WU, whereas your Ryzen has to use 1 physical core to feed 2 separate WU due to multihreading.  Want to have an image of yourself like this on? Check this thread: https://secure.worldcommunitygrid.org/forums/wcg/viewthread_thread,29840 |
||
|
|
wolfman1360
Senior Cruncher Canada Joined: Jan 17, 2016 Post Count: 176 Status: Offline Project Badges:
|
Would this explain why a core 2 duo is getting very nearly the same completion time as my fx8350?
----------------------------------------Poor intel atom d2550 having one MCM task complete in 27 hours, though. The fx is running a solid state drive and 16 gb whereas the core 2 duo is running 4 GB and a 160 gb hard drive. The intel is also running windows 7 whereas the AMD is running 10...does this make a difference? I've noticed people say that linux is quicker - and while I don't want to change my main OS to linux maybe I can try crunching on it on something I don't much care about.
Crunching for the betterment of human kind and the canines who will always be our best friends.
AWOU! |
||
|
|
Alessio Susi
Cruncher Italy Joined: Mar 7, 2015 Post Count: 17 Status: Offline Project Badges:
|
Ok, I just overclocked the Ryzen 7 from 3.2GHz (stock frequency using more cores) to 3.7. Now it takes 3:30 hours per task. The next month I'll buy a liquid cooler so I think I can try to reach 4GHz (or more I hope).
----------------------------------------
ASUS X570 E-Gaming
AMD Ryzen 9 3950X, 16 core / 32 thread 4.4 GHz AMD Radeon Sapphire RX 480 4GB Nitro+ Nvidia GTX 1080 Ti Gaming X Trio 4x16 GB Corsair Vengeance RGB 3466 MHz |
||
|
|
wolfman1360
Senior Cruncher Canada Joined: Jan 17, 2016 Post Count: 176 Status: Offline Project Badges:
|
Confusing.
----------------------------------------You would think that a 3 year old intel processor would be further behind. I mean, considering ryzen was keeping up to skylake handily. *shrug*. I guess that means more energy for the AMD to use to get the same amount of computing done per core, though 12 times more of it :P. How does the 1700x compare? How about the i7 8700 and 8700k?
Crunching for the betterment of human kind and the canines who will always be our best friends.
AWOU! |
||
|
|
Alessio Susi
Cruncher Italy Joined: Mar 7, 2015 Post Count: 17 Status: Offline Project Badges:
|
The Intel processor is installed in a work office PC, so I don't have direct contact with it. Probably someone has overclocked it and now it works faster than my Ryzen (installed in my home PC).
----------------------------------------
ASUS X570 E-Gaming
----------------------------------------AMD Ryzen 9 3950X, 16 core / 32 thread 4.4 GHz AMD Radeon Sapphire RX 480 4GB Nitro+ Nvidia GTX 1080 Ti Gaming X Trio 4x16 GB Corsair Vengeance RGB 3466 MHz [Edit 1 times, last edit by Alessio Susi at Oct 18, 2017 5:54:44 PM] |
||
|
|
SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
How likely would that be for an 'office' machine to be overclocked or volted?
|
||
|
|
|