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World Community Grid Forums
Category: Community
Forum: Hardware Chat Room
Thread: Cooling problem on Ryzen 7 3700X |
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Thread Status: Active Total posts in this thread: 17
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voidcomp
Cruncher Joined: Sep 20, 2009 Post Count: 25 Status: Offline Project Badges: 
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42C full load all core air cooled at 3600? Do you live at the north pole?
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MarcoZandrini
Cruncher United States Joined: May 4, 2007 Post Count: 15 Status: Offline Project Badges: 
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The big issue with using air cooling is air flow through the case. You can have the biggest cooler with the best paste and the cpu will still run hot. Why? The cooler isn't getting a supply of cool and the hot air isn't exiting the case quickly. Hence, you get a build up of hot air in the case. You should install a fan at the front of the case (preferably inside the case), and a second fan at the rear of the case.
----------------------------------------I run an i7 4790k (Dell XPS 8700) with a top of the line Noctua horizontal cooler with 2 fans. I've installed a 90mm fan behind the front intake grill. I've installed an identical fan at the rear of the case, but on the outside of the case. I've installed a 60mm fan, again outside of the case, sucking air from the power supply. These 3 fans run at 100% at all time. Room temps are in the 68-71*F range. The Cpu's typical temp is about 51*C running MCM at 100% across all 4 cores. [Edit 1 times, last edit by MarcoFerrari at Dec 17, 2019 9:24:23 PM] |
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Jack007
Master Cruncher CANADA Joined: Feb 25, 2005 Post Count: 1604 Status: Offline Project Badges: 
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ugh just got a 3800, and it's 75 degrees C at only FIFTY PERCENT CPU load. (8 MIP).
----------------------------------------there is ONLY the CPU fan. Taking it back to have front and top fans put in and liquid for the CPU. The good news is, I can close the heating vent and open the window, it's like 10 below 0 (celcius) right now.  |
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katoda
Senior Cruncher Poland Joined: Apr 28, 2007 Post Count: 172 Status: Offline Project Badges:
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A good cooling and airflow within the case is a must. Alternatively you can play with BIOS settings and/or Ryzen Master and limit your CPU boost. I have Ryzen 3700x, cooled by Thermalright Macho and with PBO enabled it is able to reach up to 85 Celsius with 16 WCG threads and it boosts up to something 4.1 - 4.2 Ghz (can't say exact number, I'm not at my PC right now). By limiting PPT (shortly - an amount of power consumed by a CPU) to 84W its boost dropped to ~3.9 Ghz but at the same time temps went to 67 - 70 Celsius and fans loudness decreased too. With 8 MIP1 and 84 PPT it boosts up to 4 Ghz with temperatures like 65 Celsius.
----------------------------------------Some mainboards (e.g. Asus TUF x570) have an option to limit max CPU temperature, which basically does the same thing, but does not require playing with Ryzen Master - however by using the latter I can change PPT on the fly and increase the limit to the maximum while e.g. playing a demanding game. For long term operations I prefer a bit smaller computing power in exchange of lower temps and silence :)  [Edit 4 times, last edit by katoda at Dec 24, 2019 11:10:29 AM] |
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Redneck567
Cruncher Joined: Mar 1, 2017 Post Count: 6 Status: Offline Project Badges:
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There is a very simple fix for most of these issues, but first an explanation. Most of these overheating issues are a product of Turbo modes. The CPU senses the need during the time the task is active and goes wide open. For every CPU cycle heat is generated so higher speed = higher heat. The problem is many of these CPU cycles in turbo mode are doing nothing as the CPU is running faster than the RAM/cache can provide data so a no op occurs. The TRICK to the entire problem is to match the CPU speed to no faster than the RAM can provide data. That way each CPU cycle actually does something. I am able to keep an i7 mini tower with a horrible stock cooler running at 95% CPU time in BOINC and stay below °60 C. I do this by limiting the CPU to about 90% of CPU using the Power section of Windows and Processor Power management. My thruput is much higher (2X) than running the BOINC CPU % at 50 and the CPU hardware at turbo speed. Sometimes you can go faster by going slower.
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Jack007
Master Cruncher CANADA Joined: Feb 25, 2005 Post Count: 1604 Status: Offline Project Badges:
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redneck, ty and the rest for this information.
----------------------------------------The cooling issue in my new 3800 is critical and could kill me (if I have to get it 'fixed' again, I have some masks coming in a couple weeks, you should see my hair and beard though lol). So I will try to get to windows and fix this issue. I have liquid cooling and it doesn't seem to help much. I really wish I just bought a 2800x but it is what it is... if I can fix it, should really get some good numbers. Edit: just lowered my 2700 to 90% (as a test before the other machine) and instantly my power consumption dropped and the cooling fan speed dropped. Temp at 37 degrees :D So does this mean that the turbo is stopped? EDIT 2: WOW running at 50% on the 3800 was at 80 degrees... turned process max to 90% 45 degrees. Thanks people you may have saved my life! I upped WCG settings to 70% and only increased to 47 degrees. [Edit 2 times, last edit by Jack007 at May 2, 2020 7:30:53 PM] |
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