3900x & 3700x not compatible with some AIO's and air coolers due to chiplet locations? - Page 3 - Overclock.net - An Overclocking Community

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3900x & 3700x not compatible with some AIO's and air coolers due to chiplet locations?

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post #21 of 106 (permalink) Old 07-26-2019, 02:11 PM
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If you have the space, I would go with Swiftech Drive x3 (360mm or 240mm) for $165 instead of a $200 Corsair AIO.
http://www.swiftech.com/drive-x3-aio.aspx


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post #22 of 106 (permalink) Old 07-26-2019, 02:13 PM
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Quote: Originally Posted by bigjdubb View Post
I will be installing a 3700x underneath a corsair 360mm aio this weekend. Part of me hopes that it's not quite up to the task, might be the stimulus I need to stop being lazy and build another loop.
Has anybody posted temps under a decent full loop? I'd like to put mine under a full loop as well but I'm concerned that the bottleneck is that damned tiny chiplet. When I ran my 4790k OC on the h100i, the exhaust coming from the rad was hot. 3700x under load and the air feels the same as ambient yet CPU is close to 80C.

Would love to see this thing able to sustain 60C or less under load, AIO is not enough for sure.

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post #23 of 106 (permalink) Old 07-26-2019, 02:24 PM
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I wonder if anyone is going to make a cpu block optimized for these chiplet designs. I think most of what is out there was designed for a monolithic die in the center of the socket.

EDIT:

I just went to the watercooling section and noticed that it's already being discussed. Does anyone do direct die (no ihs) cooling anymore? I'm not really sure how safe that would be with more than one die but if the manufacturing tolerances are tight and there isn't big variations in the height of the chiplets then it might be the answer to this heat density problem.

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post #24 of 106 (permalink) Old 07-26-2019, 06:36 PM
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Quote: Originally Posted by Serious_Don View Post
Definitely will be needing better cooling when/if i make the jump to a 16 core.. these suckers are tough to keep cool.
You'll get double the surface area / half the thermal density in that 2 CCD chip. So unless your cooler is just way underpowered (which any decent 200W+ tower design or AIO isn't) it should do fine with the 12 and 16 core CPUs. 7nm chiplets and about 100W of heat, give or take, are definitely challenging. Don't blame it all on the cooler!
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post #25 of 106 (permalink) Old 07-26-2019, 07:25 PM
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It seems to me that a vapor chamber air cooler would work better than heat pipes with this cpu, but the only vapor chamber cooler I know of is the awful Cooler Master V8 GTS. Is anything else out there?

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post #26 of 106 (permalink) Old 07-26-2019, 07:33 PM
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Sapphire once made a Vapor-X CPU cooler but the vapor chamber only connected to a press fit 4 x 7mm heatpipes with a fin stack that probably wasn't large enough.

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post #27 of 106 (permalink) Old 07-26-2019, 07:54 PM
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Cool. I've been searching and there is a Cooler Master MasterAir Maker 8 vapor chamber cooler that looks a lot better than the V8, but it does not come with AM4 mounting brackets. The name alone makes me want to avoid it.

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post #28 of 106 (permalink) Old 07-26-2019, 08:01 PM
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Quote: Originally Posted by killeraxemannic View Post
If you wouldn't mind I would be really interested to know what your temps are after 10 min running OCCT small data set. It's a free light weight program for stress testing. https://www.ocbase.com/

I'm really trying to figure out if certain AIO's & coolers work substantially better than others with the 3900x and I would be interested in keeping the test parameters the same so I could maybe chart it later.
I ran the OCCT small data set for 10 minutes as requested. It took about 6 minutes to hit 79C and it stayed there for the rest of the run. Pulled 145.5 Watts the whole time and ran at 4025 MHz.
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post #29 of 106 (permalink) Old 07-26-2019, 09:04 PM - Thread Starter
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Quote: Originally Posted by Dibiase View Post
I ran the OCCT small data set for 10 minutes as requested. It took about 6 minutes to hit 79C and it stayed there for the rest of the run. Pulled 145.5 Watts the whole time and ran at 4025 MHz.
Ok thanks! That's a pretty good result actually. With my decent air cooler (Scythe Fuma 2) that test spikes up over 90C almost immediately. I got a free Corsair H110i Extreme Performance from a guy I work with today so hopefully I can test it soon and see how it compares once I get some fans and mounting hardware for it.

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post #30 of 106 (permalink) Old 07-26-2019, 09:13 PM
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Quote: Originally Posted by killeraxemannic View Post
I have been reading around a bit and it seems that people are having issues with very high temps on the 3900x with many of the popular AIO coolers and air coolers. Even the Noctua NH-D15 and BeQuiet! Dark Rock Pro 4 have reports of temps over 90C on load. Someone on reddit mentioned it may be due to the fact that most of the cooler designs focus cooling on the center of the plate and due to the chiplet design of the 3900x being offset they don't effectively cool the chiplets. It seems like there may be quite a few coolers that are affected. I am wondering if there may be some new AIO and air cooler designs coming out that will get cooling over the entire chip or if there are any currently out there that are better at cooling across the plate than others. Thoughts?
It is more than likely in mid-summer the real issue is high ambient temeratures. I have very high ambients in the sunroom where my computer with the 3900X is located. Even my old 2700X would hit above 90 Celcius after 10am in the morning until 7 pm in the evening. That is with 2 air conditioners running it still hit just above 90 degrees Farenheit in the room. I have the Eisbaer EXtreme 280 which is an extreme;ly powerful liquid cooler.

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