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post #1 of 27 (permalink) Old 07-21-2019, 10:12 PM - Thread Starter
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Below Ambient AMD (Ryzen 3000 & Navi)

Given how well the new SKUs from AMD respond to lower temperatures is anyone considering building a below ambient rig for the new AMD platform?

Given the reductions in power seen with the new architecture, the numbers look good for for the first time to be both practical and manageable by small commerical grade glycol chillers. e.g. beer line/ferment home brew style glycol chillers (600-900watt cooling capacity).

Last edited by Thermal_Preist; 07-21-2019 at 10:19 PM.
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post #2 of 27 (permalink) Old 08-02-2019, 10:15 PM - Thread Starter
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Well, I guess i'll take the plunge then!

I have a glycol chiller from the beverage industry, it's comfortable at -10c dissipating 780watts of heat, which with GPU and CPU in the loop should be ok to keep fairly stable at around -10C.

Time for some flow testing.
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post #3 of 27 (permalink) Old 08-02-2019, 10:17 PM
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They run cool enough as is, no need in below ambient cooling. Unless your benching the average user won't see a point in below ambient cooling.

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post #4 of 27 (permalink) Old 08-02-2019, 11:12 PM - Thread Starter
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I guess the average user isn't posting in "specialised cooling" either.
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post #5 of 27 (permalink) Old 08-03-2019, 09:48 PM
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This is neat! Love to see some pictures!
You mention below ambient but are running below freezing - I can dig that.

So I run a Geothermal loop for sub ambient and that over a TEC for sub zero temps.
Do not have a Ryzen 3000 series chip while I do have a 2700X and other various lesser model Ryzen based chips.

My next adventure is perhaps a try at passive cooling to see what I could get away with if my Cpu fan ever died lol. But that's for a different topic.


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post #6 of 27 (permalink) Old 08-03-2019, 10:13 PM
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All Cpus that exist responds well to temperatures
Temp is key to more overclocking.

Keeping the voltage same, but dropping temps instantly gets you at least 0.1GHZ increace in all cores prime stable.

5 to 10c decreace in core temps can get you 0.1GHZ in FX and Ryzen CPUS

If you want to save money and get top perfomance and save time.
Just buy faster cpus.
OC dosen't do much, its more about the fun.

Below ambient you can only do up to 5c more than that it condensates and dies.
For xtreme epexct to replace motherboards every 1to 12 months. (My exprience with xtemere)

Overcloking is about the passion, not about how much you clock
Overclocking is not about the pefromance gains, it is about the passion
Overclocking is about the Fun, Enjoyment and Passion

Pushing Voltages And Lower Tempertures Makes You The Overclocking Champion
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post #7 of 27 (permalink) Old 08-03-2019, 10:34 PM
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Quote: Originally Posted by Iwamotto Tetsuz View Post
All Cpus that exist responds well to temperatures
Temp is key to more overclocking.

Keeping the voltage same, but dropping temps instantly gets you at least 0.1GHZ increace in all cores prime stable.

5 to 10c decreace in core temps can get you 0.1GHZ in FX and Ryzen CPUS

If you want to save money and get top perfomance and save time.
Just buy faster cpus.
OC dosen't do much, its more about the fun.

Below ambient you can only do up to 5c more than that it condensates and dies.
For xtreme epexct to replace motherboards every 1to 12 months. (My exprience with xtemere)
In the way past, I've experience some processors that prefer a warmer temp rather than cold or 0 and sub zero.
Ran into many many 754 chips that where cold bugged. Found a nice little Paris core that hit 3.2ghz though... diamond in the rough I suppose.
FX responds super very well to colder temps. The colder the better. There is no voltage limitation there and any overclock would help an FX Cpu.
Ryzen chips seem to Wall pretty hard in comparison to FX chips.
One thing that is true, lower the temps is always better.

Funny you mention just buy faster cpus..... I find that those get overclocked too. lol.

"Overcloking is about the passion, not about how much you clock
Overclocking is not about the pefromance gains, it is about the passion
Overclocking is about the Fun, Enjoyment and Passion"

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post #8 of 27 (permalink) Old 08-03-2019, 10:38 PM
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Spending the money on the xtreme cooling gives dimineshing returns
Compared to the fancy CPU w a cheap 120mm AIO chiller + OC

I belive overclocking is stupid if you want outright perfomance and you currently are water chilled with AIO water 120mm rads or better.

Overcloking is about the passion, not about how much you clock
Overclocking is not about the pefromance gains, it is about the passion
Overclocking is about the Fun, Enjoyment and Passion

Pushing Voltages And Lower Tempertures Makes You The Overclocking Champion
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post #9 of 27 (permalink) Old 08-03-2019, 10:44 PM
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I do agree 100%. But I'm an enthusiast and take interest in specialized cooling such as glycol chillers and SS.... probably because I've never used either cooling type apparatus.
But done plenty of other chilling methods, just about all the other chilling methods in fact.

Currently running 2700X on stock air. -30c didn't make any difference in max OC, but did allow the use of lower volts at X oc.


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post #10 of 27 (permalink) Old 08-03-2019, 10:50 PM
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The 2600 ryzen I have dosen't seem to exibit any walls
It scales very well with voltages and will clock higher if I give it more chill.
Only talking about prime stable OC

With the FX I find that lower temperatures goign from 30c water to 0C water temps in water loop dosen't help much with the outright cpuz vadilation overclocks though 0.1to 0.2GHZ gains at most from the 5.2to5.3 GHZ region

EDIT:
I belive your hitting a wall with the motherboard to CPU lane and you need to somehow fine tune motheboard voltages to get more
Or you can be hitting a wall where the input and output impedance becomes mismatched in CPU area due to increace in frequency (I belive is unlikely though)
You said -30c as comparison to some standard ambients say 20c.

Overcloking is about the passion, not about how much you clock
Overclocking is not about the pefromance gains, it is about the passion
Overclocking is about the Fun, Enjoyment and Passion

Pushing Voltages And Lower Tempertures Makes You The Overclocking Champion

Last edited by Iwamotto Tetsuz; 08-03-2019 at 10:56 PM.
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