CPU temperatures jumping around.

[wyattzx]

Hey guys.

 

So today I decided to attempt to bump up my clock on my CPU just a hair more than what I had it at. (From 4.3ghz to 4.5ghz.) I bumped up the voltage from 1.3v to 1.4v, and bumped the multiplier up from 21.5, to 22.5. This is what my CPU-Z and HWMonitor look like right now.

 

http://i.imgur.com/NwDfA2H.jpg

 

(Don't want to direct-embed, because it makes the thread larger than it needs to be.) 

 

Do you think ,going from 4.3 to 4.5ghz, I shouldn't need to go from 1.3 to 1.4v? Should I try a half-step at 1.35v? It is entirely stable at 4.3ghz, also. I am running a Hyper 212 in Push-pull configuration. 

 

The CPU temperature doesn't stay the same for even a second, going from 33c to 47c in an instant jump. The highest HWMonitor has logged so far is 61c. These are all at idle.

[Godlygamer23]

You can put spoiler tags around the link and it'll hide it unless we click "show."

[LosthawkX]

yeah but the temperature sensors in amd are not the best  

[wyattzx]

So I bumped the voltage down to 1.35v, but kept the clock. Temps are still jumping around. Will try going back to what I had before, and see if I just never noticed it previously.

[wyattzx]

I bumped the clock down to 4.3ghz, and returned to 1.3v. Seems to be settling at around 30c, with the occasional jump to 40c. I saw a spike of 50c, but that was when my PC first turned on, and for a brief moment it said 100% cpu usage, so I can counting that a coincidence. What am I to think? Another mind on this could really help. 

[Godlygamer23]

I bumped the clock down to 4.3ghz, and returned to 1.3v. Seems to be settling at around 30c, with the occasional jump to 40c. I saw a spike of 50c, but that was when my PC first turned on, and for a brief moment it said 100% cpu usage, so I can counting that a coincidence. What am I to think? Another mind on this could really help. 

Well, I would stress the CPU, and not rely on idle and spike readings too much.

[wyattzx]

Well, I would stress the CPU, and not rely on idle and spike readings too much.

I'm just afraid to stress it, since I saw a jump to 50c, and regular jumps to 60c earlier. With just browsing this forum.. 

[Godlygamer23]

I'm just afraid to stress it, since I saw a jump to 50c, and regular jumps to 60c earlier. With just browsing this forum.. 

Is your cooler mounted properly? Firm pressure needs to be placed on the CPU's heat spreader. Did you also apply thermal paste?

[wyattzx]

Is your cooler mounted properly? Firm pressure needs to be placed on the CPU's heat spreader. Did you also apply thermal paste?

Yes, yes. Cooling is mostly optimal for my 4.3ghz clock. At night, when the air's a nice 70f or so in my room, I see idles around 23-27c. The idle temps around 30c are fine, just that it's spiking so much, and so high, are my concerns. 

[Godlygamer23]

Yes, yes. Cooling is mostly optimal for my 4.3ghz clock. At night, when the air's a nice 70f or so in my room, I see idles around 23-27c. The idle temps around 30c are fine, just that it's spiking so much, and so high, are my concerns. 

Well, your idles are low. If it was me, I'd just take the plunge and stress it - even temperatures go too high, instantly close the application.

[wyattzx]

Well, your idles are low. If it was me, I'd just take the plunge and stress it - even temperatures go too high, instantly close the application.

 

Here's what my idling is like right now at my 4.3ghz @1.3v clock. I've already stressed it with Prime95 for an hour at this, and saw a max temp of 77c. Should I just accept this clock as the highest on my Hyper 212, and move on? Or should I push for 4.5gh @1.35v?

[Godlygamer23]

 

Here's what my idling is like right now at my 4.3ghz @1.3v clock. I've already stressed it with Prime95 for an hour at this, and saw a max temp of 77c. Should I just accept this clock as the highest on my Hyper 212, and move on? Or should I push for 4.5gh @1.35v?

For the record, AMD temp sensors are sometimes awful. However, you're SURE the cooler is mounted properly with an appropriate amount of thermal paste?

[wyattzx]

For the record, AMD temp sensors are sometimes awful. However, you're SURE the cooler is mounted properly with an appropriate amount of thermal paste?

I haven't changed my thermal paste in a year or two, so I might want to do that. That being said, during a 4-hour session of Grand Theft Auto V, my max temperature was 52c. I just tested it again, and still, a max of 51c. (Played for 10 minutes, never went above this.) I should replace the thermal paste, yes, but I don't think that's directly an issue. Again, at night my idle temps are fine. They even appear fine now, aside from jumping around a lot. Is that just because of AMD's poor sensors? 

[wyattzx]

To give this a quick followup:

• I changed the thermal paste, and saw marginally better cooling. It was definitely old, but it didn't appear to be wearing out much, as temps didn't really change at all. Only within a margin of error. 
• I toned my clocks back down to 4.3ghz @1.3v, as going over that caused my temperatures to jump around too much, and it made me a tad uncomfortable. Especially so since we're headed into Summer, and I only have an air cooler. Not really the best for 4.5ghz, it seems. 
• I will be waiting to do any more overclocking for when I upgrade to Intel. Whether it will be Skylake, or the current line of chips, I have yet to determine. That being said, I plan to pair my upgrade with an AiO, to maximize OC potential. (4.8ghz on a 4790k?)