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-   -   undervolting of FX-9590? Yes, FlanK3r want be back at Overclock.net (https://www.overclock.net/forum/10-amd-cpus/1506702-undervolting-fx-9590-yes-flank3r-want-back-overclock-net.html)

FlanK3r 08-09-2014 09:12 AM

Finally I take some time for testing lovely Visheras chip. This is first part, because I have still many other work to do.


First one is 1327PGS


Cooling AIO AMD Cooler liquid - so a bit better than Noctua NHD14


FX-9590 is highend CPU with high TDP and of course high stress for motherboard VRM (CPU want more current for right working :-) ). The clocks are 4700 MHz and up to 5000 MHz for light stress. I used again older Asus Crosshair V Formula. Formula-Z is a bit better. At C5F is not official support, but CPU working OK. Only the one issue is CPU ratio * is set default at 23.5, not auto. So your CPU is not underclocking here. Thats mean a bit higher idle power consumption (+20-30W I mean)



So, what about power consumption at stock settings?

As I mention, the CPU ration in idle is still at 23.5 (4700 MHz), the power consumption of PC is:


In practice load in Cinebench render is:


In stress stability test is:


stress in x264FHD (Cinebench description is mistake in editor)



So, we can try this CPU undervolting? Yes smile.gif


I tried few steps in undervolting. First one in stability test for 30 minutes. 1.44 V in idle, 1.416V in load. LLC for CPU and CPUNB set as HIGH. Ussually in practice use will be power consumption around 30 W lower than in stability stress test...



Second step is a bit better, nice settings with 1.428 V and 1.404V in load.




Third step of undervolting in stress test, next settings is and now "only" 301W in load with 1.38 V in load! Idle jumping between 1.404-1.416




PS: Im still testing next steps in udnervolting. In next week we will see some results and OC resutls as popular benchmarks and some OC stability tests of first 9590. Later second CPU...


Next part of undervolting
First under 300W PC in stress test, 1.392 V in idle and 1.368V in load





This part is 1.38 V in idle and 1.356V in load!





Final max stable undervolting settings for FX-9590 stock clocks 1.368V in idle and 1.344V in load.





There was error after 20 minutes :-/, but still not bad result




So, first part of FX-9590 is done. Undervolting at stock clocks. Its awesome to know, there is difference around 70 W in power consumption for load!!!

rapsure 01-27-2018 04:50 PM

I know this is resurrecting a really old thread. But this really helped me to figure out how to get my FX 9590 to work in my computer. So I decided I would buy a captain 120EX AIO for my old FX 8350 which I've had for like 5 years. I needed a little more cooling because the factory heatsink was on the edge of barely keeping the cpu cooled below shutdown at 90C. Since I was just trying the water cooler setup and I had read that this is what is needed and so I figured I would try the FX 9590. I watched which is from AMD and used the Captain 120. I bought the Captain 120 EX white which is nearly the same thing. I get everything installed with the FX 9590 and start my stress test. The stress test is compile Firefox, and rip a DVD to H.264 high profile quality level 10 in handbrake. This is an extreme workload which the old FX 8350 on stock cooler was running in the 80+ C range.

The Captain 120EX with ambient being 18 C ran the FX 8350 at 29 C idle and 56 C in the stress test. I was thinking at 20 C increase should handle the 100 watt increase. I was terribly wrong. So I tried a temporary duel fan setup on the FX 9590 and the cpu almost made it through the stress test, but hit thermal shutdown in the end of the compile of Firefox. I tried just straight underclocking to an FX 8350 speed and that did decrease power, but not enough to be safe. In the end the trick was to set the LLC to high and set the core voltage to 1.381 volts and the speed of the FX 9590 to 4.7GHz with boost to 5GHz.

My setup:
Asus Sabertooth 990FX R2.0
Captain 120 EX white modified to be duel fan.
Cooler master HAF case with 2 fans in front intake, 1 side fan intake onto CPU area, and 1 top exhaust fan.
FX 9590 undervolt to 1.381V and factory speed 4.7GHz and 5.0 GHz turbo
motherboard setting of LLC of high

Results:
Stress test of Firefox 57.0.4 compile and handbrake DVD rip to H.264 high profile
Max temp 75C
Typical temp 70C
Low temp 65 C

Typical operating temps:
idle: 29 C
games: 55 C
internet browsing: 29C
Firefox only compile: 65C

Thanks for putting this info up online. Just a straight undervolt did not work. The trick is changing the LLC setting for the CPU.

rapsure 01-27-2018 04:51 PM

Fission reactor controlled
 
I know this is resurrecting a really old thread. But this really helped me to figure out how to get my FX 9590 to work in my computer. So I decided I would buy a captain 120EX AIO for my old FX 8350 which I've had for like 5 years. I needed a little more cooling because the factory heatsink was on the edge of barely keeping the cpu cooled below shutdown at 90C. Since I was just trying the water cooler setup and I had read that this is what is needed and so I figured I would try the FX 9590. I watched which is from AMD and used the Captain 120. I bought the Captain 120 EX white which is nearly the same thing. I get everything installed with the FX 9590 and start my stress test. The stress test is compile Firefox, and rip a DVD to H.264 high profile quality level 10 in handbrake. This is an extreme workload which the old FX 8350 on stock cooler was running in the 80+ C range.

The Captain 120EX with ambient being 18 C ran the FX 8350 at 29 C idle and 56 C in the stress test. I was thinking at 20 C increase should handle the 100 watt increase. I was terribly wrong. So I tried a temporary duel fan setup on the FX 9590 and the cpu almost made it through the stress test, but hit thermal shutdown in the end of the compile of Firefox. I tried just straight underclocking to an FX 8350 speed and that did decrease power, but not enough to be safe. In the end the trick was to set the LLC to high and set the core voltage to 1.381 volts and the speed of the FX 9590 to 4.7GHz with boost to 5GHz.

My setup:
Asus Sabertooth 990FX R2.0
Captain 120 EX white modified to be duel fan.
Cooler master HAF case with 2 fans in front intake, 1 side fan intake onto CPU area, and 1 top exhaust fan.
FX 9590 undervolt to 1.381V and factory speed 4.7GHz and 5.0 GHz turbo
motherboard setting of LLC of high

Results:
Stress test of Firefox 57.0.4 compile and handbrake DVD rip to H.264 high profile
Max temp 75C
Typical temp 70C
Low temp 65 C

Typical operating temps:
idle: 29 C
games: 55 C
internet browsing: 29C
Firefox only compile: 65C

Thanks for putting this info up online. Just a straight undervolt did not work. The trick is changing the LLC setting for the CPU.

Shinseku 02-01-2019 04:33 PM

Do you know what is the lowest voltage that this processor supports and stable? Since I have the same processor model, but it seems that my liquid refrigeration does not support it for its TDP, so I could lower the voltage consumption for less temperature, I do not have the money to upgrade to Ryzen 3 or Ryzen 5 and I would like to use This FX9590 processor with a MSI 990FXA Gaming board. Could you help me or tutor me with this, it would be a lot of help...

FlanK3r 07-24-2019 11:36 PM

depends on quality of chip (and motherboard+PSU also), as u can see, my chip was OK up to 1.35V

But for sure, some chips are worse, so they need eg 1.44V

FlanK3r 12-10-2019 03:34 AM

update//

Be carefull with Sabertooth 990FX R2.0 and latest BIOS. If you are want to do undervolting, use only manual voltage settings. Offset doesnt work properly. If you try negative offfset example 0.05V, bring it crazy effecet after save+exit BIOS setings... PC crashed in WIndows after few seconds of benchark. PC chustdown and I had over 600W of power consumption on PC (only short CPU load!). On stock it is around 300W, so extra 300W after negatovi offset settings. Thats mean, real voltage on CPU could around 1.7V!

Next start was impossible, there worked OCP because high voltage and VRM protection. Was needed reset BIOS via jumper and wait after VRM cool down a little (after the shock)

Kryton 12-10-2019 08:41 AM

The results you got within your opening post is about what I got with mine too when I undervolted my 9590 in my CHV-Z board on air sometime ago.

I was able to run it's stock rated speed (4.7) with much less voltage than it's spec'ed for with no problems BUT I was using big air, namely my Scythe Susanoo cooler - You won't do this with a stock or one that's even close to stock. In almost every case watercooling is required for one of these chips period and the only way I can run that cooler on it is by undervolting.
If using the stock spec'ed voltage it will thermal trip after only a couple minutes if that long TBH.
I coudn't run it beyond 4.7 with it, if I try to go any higher it trips again even if undervolted so that means with the setup I was using it was right on the edge with the undervolt applied.

I'll also point out my chip is of a later date than the actual opening post so silicon quality is hardly different too between the two chips represented.

Regardless, it's strongly suggested the 9xxx series chips be ran on watercooling or better period if you want it to live.

The Pook 12-10-2019 08:46 AM

1.7v would not have caused a 9590 to draw 600W, lol.

cssorkinman 12-10-2019 09:04 AM

Quote:

Originally Posted by The Pook (Post 28231372)
1.7v would not have caused a 9590 to draw 600W, lol.


It is otherworldly how much they can draw at that kind of voltage. I'll have to dig for the tests I did with my 9370 but I do recall it hitting 420 watts with only the cpu loaded at stock clocks.

Ahnt 12-28-2019 06:16 AM

If I had a watt tester I would test my garbage 8320 @ 4.8ghz which needs 1.608v to run stable. I kinda don't want to know.


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