CPU Temps & Multiplier Issues

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Hibblejaybob

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Sep 18, 2016
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Hi everyone!

I have two questions for you - I think they're related, but I'm not overly sure.

1st Question: Cooling
A while ago I installed a custom cooling loop, and I'm about worried about the temperatures. They are very consistent: Under full load, it won't go above 62 degrees, but at idle, it won't get any lower than 45 degrees, which I find pretty high. My old, all-in-one loop, had idle temperatures of 18 degrees, but load temps of over 75 degrees. Is that high an idle temperature normal? If not how can I fix it?

As a quick reference, my cumputer has been under 100% for 10 minutes now. CPU temp is showing as 48 degrees. Cooling liquid is 37.2 degrees. Ambient temp is 25 degrees.

2nd Question: Multiplier Issues
I'm having a problem with the multiplier on the CPU dropping from 23.5 (not overclocked) down to 7. It happens the CPU is under moderate load (around 60 to 80%), which causes the CPU to spike to 100% and everything freezes. CPU temps stays consistent at (mostly) under 60 degrees.

I have had to look up about this issue before: all the power saving options in my BIOS are off. Everything I have tried from finding online hasn't worked. The only thing I can think of is the age of my PSU. My PC only draws ~300W at idle and around 550W at 100% CPU & GPU load, which is well within the 950W PSU of my computer. However, the PSU is 6 years old: could it's age be the cause of my issue?

System Specifications:
Processor: AMD FX 9590 (8 core, 4.7 GHz, not overclocked)
Motherboard: Gigabyte FX-999-UD3 r4
RAM: 16 GB (DDR3 - Corsair XMS3)
Graphics: ATI Radeon HD 7970
VRAM - 3 GB
EK Liquid Cooling Loop (custom built)
PSU: X-Power Pro GTX Extreme 950 (950W)

Hope you can help!
Cheers,
Hibblejaybob
 
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H

Hibblejaybob

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Sep 18, 2016
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Multiplier shouldn't be dynamic when it's set to be fixed. Even if it is, is shouldn't be dropping when CPU is needed the most.

The cooling loop is madeup of EK components. Water flows: Radiator > CPU > GPU > Pump > Radiator. Radiator is 120x360mm, with 5 extraction fans on the radiator. There are a further 4 intake case fans.
 
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Multipack

Multipack

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Sep 5, 2016
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Well I couldn't quite work out what you were saying, and it sounded like the opposite, but no that shouldn't happen under load. And some systems dont have fixed multipliers, but even under load its usually the baseclock that changes. Maybe you dont have a powerful enough PSU. Its not a common problem granted.

Custom loops are notoriously unpredictable, but on paper yours sounds fine. What temps are your pump and GPU reading at idle? When was the last time you applied TiM to your CPU?

Sounds like you could have a hardware issue maybe.
 
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Hibblejaybob

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Sep 18, 2016
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My system has a BIOS to allow the multiplier to change (decrease when not needed and boost when needed), that's what I meant by it being fixed.

Temps, let's take a look. We've been idle for about 10 mins now (CPU < 10%). CPU temp: 46 degrees, GPU temp: 46 degrees, Coolant temp: 35 degrees, Ambient temp: 25 degrees.

I might sound a bit thick here but: "applied TiM" - I'm not familiar with that abbreviation, could you explain for me?

Cheers

 
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Multipack

Multipack

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Thermal interface material or thermal paste.

So your multiplier is lowering when your system is under load? That really doesnt sound healthy. Couple that with the high idle and it suggests you could have a voltage/PSU issue maybe. Have you checked system voltage in HWInfo or the like? Anything amiss?
 
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Hibblejaybob

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Sep 18, 2016
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Well, ah heck my biscuits...... looks my temperature sensor was looking in the wrong place. OKAY so, at idle, the CPU is currently only at 28 degrees, GPU at 45, Coolant at 32.8, ambient still 25.

I'm afraid I'm not overly familiar with what I am looking for with voltages. Here's the readout at idle:
CPU CORE 1.500 V
DRAM 1.476 V
+5V 5.010 V
+12V 11.880 V
VIN4 1.992 V
VIN5 2.220 V
VIN6 2.220 V
VIN7 1.632 V
CMOS BATTERY 1.608 V

As for thermal paste, last application was when the cooling system was seated 3 months ago. Now that I know my CPU temps have been wrong for a while, I'm going to try it under load again.

UPDATE: Ran it under CPU load of 100% for around 5 minutes, temperature stabilized at 51 degrees.
 
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Multipack

Multipack

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Sep 5, 2016
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Thats a much healthier idle lol. Still not sure why the multiplier would be lowering under load though. Is it definitely doing that?

Your vCore is pretty high. Your CMOS battery is half what it should be (3v). That could be the problem, but unlikely. I'd def try replacing it though.

Is a mystery if I am honest, as you say you havent OC'd it and the TiM is quite new.
 
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Hibblejaybob

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Sep 18, 2016
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The vCore should 1.512V according to AMD. The problem with AMD is there development is better speeds by way of MOAR POWER. But it's within expectation.

I decided to run Speccy (Pririform's system specification program) while I was recording a game for my YOuTube channel. Whenever the FPS dropped, I check the output and it read a multiplier of 7x for most of the cores.

The motherboard is only about a year or so old, would the CMOS batter be that dry already?

 
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Multipack

Multipack

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Yeah, keep forgetting its AMD lol. The CMOS shouldnt affect the system when its on no. It just stores the BIOS settings when off. I guess it could do though.

For some reason your board is lowering the multiplier for safety, or through power savings. I think thats a feature of some boards but it doesnt explain why. If you haven't OC'd it is a mystery.
 
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Hibblejaybob

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Sep 18, 2016
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I also have all those features switched off to prevent lowering the multiplier.

If it was an issue with my PSU, how would I know?
 
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Multipack

Multipack

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Sep 5, 2016
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I v much doubt it, and the fact you say you have all those features switched off makes me think it could be related to misconfigured BIOS settings. You'd probably benefit from loading optimized defaults, as it could be the cause.

You voltage readings are the best way to check PSU really, but it's hard without a voltmeter.
 
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Hibblejaybob

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Sep 18, 2016
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Hmm, I wouldn't know about that. All I've done is follow common advice and switch off two options. The first allows for cores to be disabled when inactive. The second allows the multiplier to drop to save enegery.

With both of them enabled, gaming is pretty much impossible, let alone trying to record: if the CPU changes by more than 10% the multiplier collapses down to 7x for like 5 seconds (ie, a really long time in a video).

By having them disabled, the drops are few and far between (around one or two in every 30 mins of footage), but still enough to an issue.
 
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