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post #1 of 12 (permalink) Old 08-17-2019, 08:08 PM - Thread Starter
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Ryzen 7 3700x very very high temps

I am working on a build using a Ryzen 7 3700x and an asus b450 mini-itx board but currently it is outside the case with a fan blowing on it for testing (to eliminate airflow issues). I have tried two different coolers, the Cryorig C7 Cu G and the Noctua NH-L9x65mm using a bb sized drop of cryo grizzly cryonaut thermal compound (and yes I spread it out with the spatula). I am getting great contact on the CPU, especially with the noctua cooler and the fan is set to max at all times however I am getting horrendously bad temps (~50c idle ~90c during cinebench r20... even hitting 95c with intelburn test which sometimes causes it to throttle and other times it thermal shutdowns)... same with both coolers. What is going on here? I am at my wit's end, I am starting to wonder if this CPU has an air gap between the die and the heatspreader, but I feel like that is an extremely rare occurrence... I tried both the ryzen balanced power plan and the regular windows power plan, no change. I tried setting the cpu voltage offset to - .100 but that just made it more unstable for about 1c of difference. Everything is bone stock no overclock or anything, literally optimized defaults except for the fan being set to max.

***? Any help would be great.

Temps were measured using HWinfo and Aida64 (which report about 3-5c less than ryzen master but the same compared to eachother)

Last edited by JAG88; 08-17-2019 at 08:14 PM.
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post #2 of 12 (permalink) Old 08-17-2019, 08:27 PM - Thread Starter
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I just ran realbench and that maxed it out at only 80c (which although not great, considering the low profile cooler is fine since it won't throttle at 80c anyway)... But it's still weird, whats going on here? These are bizarre results. Its strange to me that Cinebench R20 and IntelBurn Test push it to 90-95c but realbench only hits 80c... something to do with the type of operations they are doing I guess. This really really worries me that some day down the line I will run an application that uses an operation which makes my CPU overheat out of the blue.
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post #3 of 12 (permalink) Old 08-17-2019, 09:09 PM - Thread Starter
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I just swapped the fan on the noctua cooler from the NF-9B back to the stock NF-9Ax14 fan and that dropped me another 4c down to 78c for the real bench run (I guess the NF-9B is not hitting it's 1600rpm max because it should push more CFM at 1600rpm than the NF-9Ax14 at 2200rpm) and I hit an amazing 81c for cinebench! lol I have no idea whats going on with cinebench but at this point I will take it, gonna button this up and try it with it in the case
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post #4 of 12 (permalink) Old 08-17-2019, 10:22 PM
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I hit 81c on Cinebench R20 but I'm 99% sure its my cooler just not being that great. Still massively better temps than I was getting on the stock cooler though I would throttle on that thing

CPU
AMD Ryzen 7 3700X
Motherboard
ASRock Taichi X570
GPU
EVGA GeForce RTX 2070 Black
RAM
G.SKILL Flare X 16GB DDR4 3200MHz
Hard Drive
(Crucial BX500 240GB) (WD 2TB) (HGST 4TB)
Optical Drive
ASUS DVD-RW
Power Supply
SeaSonic SSR-650RM
Cooling
DEEPCOOL GAMMAXX GT
Case
Cooler Master HAF XB EVO
Operating System
Windows 10 Pro
Monitor
(TV: LG 49UH6030)
Keyboard
Logitech G613 Wireless Mechanical Gaming Keyboard
Mouse
Logitech G603 LIGHTSPEED Wireless Gaming Mouse
CPU
Intel Core i7 6700k
Motherboard
ASUS Z170 PRO
GPU
MSI GTX 1070 ARMOR OC
RAM
G.SKILL Ripjaws V 16GB DDR4 3200MHz
Hard Drive
(Microcenter SSD 64GB) (WD 1TB)
Optical Drive
ASUS BLU RAY
Power Supply
SeaSonic SSR-650RM
Cooling
Cooler Master Hyper 212 Push/Pull
Case
NZXT Source 210 White
Operating System
Windows 10 Home
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post #5 of 12 (permalink) Old 08-18-2019, 04:20 AM
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So then it's a cooler limitation. The Noctua is rated for "caution beyond 84W TDP" and the CPU is 88W. Cryorig rated the C7 higher but it's not much better in terms of cooling. It failed to keep a 4770K OC from hitting thermal shutdown and if we compare the results to the Gammax we see 10°C+ difference so in line with what Captain318 stated and with an increase temps from med OC the gap gets even bigger.

Granted this is all based on standard C7 but there's what? at best 10-15% improvement with the newer CU and G versions?
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= Ryzen 7 3700X 4.3GHz @ 1.3v / Thermalright TS140 BW / Prime X470-Pro / 16GB Crucial BSLT 3733 MT/s cl16 / 1080Ti Amp Extreme 2GHz @ 0.987v / Aerocool Project7 P650 / Fractal Define XL =
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post #6 of 12 (permalink) Old 08-18-2019, 05:28 AM
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Hello,

I speak from my (still quite limited)_but relevant experiences.

I have a Nocutra NH-9 0etc.....that is a small cooler - It's just not good enough.

I've OC'd several CPU's from 3770 K >>3930 K >>E5 1680 V2 >> E5 2697 V2 >> etc......and the big coolers make a hell of a difference.

When I was building / installing a Noctura NH-9 (what ever) was used ----on the bigger core CPU's the temps reached 70's C with basic testing ---maybe some experimental PASSMARK benches ------So I put the Noctura D15 / Phanteks TCP14 (what ever)___but a BIG air cooler.

You'll need to upgrade to a big air cooler.

I've not tried an AMD CPU yet but I'd try to reduce the v_core at stock if possible___if it is possible you'll lose some degrees in C.

I would guess you'll lose 20 C with a big air cooler ---

There maybe RAM clearance issues unless you use Corsair LPX or similar like Kingston Fury / i forgot the other name of the Kingston ---but it provides more clearance for big coolers ----With twin blocks of aluminium fins to absorb the heat.

Or a Le Grande Macho -- the best version which provides plenty od room for RAM clearance as it has been designed to do so. It gets good reviews but I'm not sure if it as good as BIGGER coolers.

Dark Rock is another one but you'll need to make sure they are compatible with the AMD socket

Last edited by fra z; 08-18-2019 at 05:43 AM.
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post #7 of 12 (permalink) Old 08-18-2019, 05:31 AM
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your coolers are not enough for the chip
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post #8 of 12 (permalink) Old 08-18-2019, 06:04 AM
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Quote: Originally Posted by poah View Post
your coolers are not enough for the chip
Yes 250 W capable air cooler or a liquid_all_in_one__(AIO)__then come back here and show the differences -----and lowering v_core if possible____and testing____for stability___unless 3700 X is totally not-flexible you should be able to get those temps way down compared to what you showed earlier ---

You could save the Noctura NH-9 for an office / home machine that is not used to game or do heavy compute tasks on as it is a good stylish cooler but I wouldn't use it on anything more than a dual core Pentium / AMD equivalent - low level CPU, again that is good for basic things

Last edited by fra z; 08-18-2019 at 06:07 AM.
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post #9 of 12 (permalink) Old 08-18-2019, 02:05 PM
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Yes, after all, the 3700 X is 8C/16T so would take some cooling if all cores and threads are working away
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post #10 of 12 (permalink) Old 08-18-2019, 04:42 PM
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Ryzen 3K CPU temp is the hottest core.
The CPU boost is load dependent so light load/idle boosts the speed/vcore high (~1.47V) and this causes the high idle temp.
On heavier load the speed/vcore goes down (~1-1.3V) and the active core uses less power.

Here is my stock 3700X values in idle doing nothing and in P95 blend after 10 min. I am using large air cooler, Scythe Fuma 2.
The peak temp happened when test was finished and another began.
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Air PC-O11 Dynamic
(9 items)
CPU
AMD Ryzen 7 3700X
Motherboard
MSI B450 TOMAHAWK MAX
GPU
Sapphire RX 5700 XT Pulse
RAM
G.Skill 16GB (2 x 8GB) Ripjaws V, F4-3600C16D-16GVK, OC 3800 16-17-16-32 @1.376 V
Hard Drive
Corsair Force MP510 1TB NVMe
Power Supply
Seasonic FOCUS Plus 750 Gold
Cooling
Scythe Fuma 2
Cooling
Noctua NF-F12 PWM chromax.black.swap
Case
Lian Li PC-O11 Dynamic
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