Aida64 FPU stress test immediately causes my CPU to throttle.

[Halcyon Genesis]

I reinstalled my CPU cooler entirely (and also redid my cable management) after I ran the test and my CPU throttled. I made sure to use a very small amount of paste the second time. I was idling between 38-41C before, and now I'm idling between 35-38. Aida64's FPU test still causes throttling within seconds, though.

Is my CPU a dud?

4790K at 4.4GHz
Hyper 212 EVO
Maximus VII Hero
1867 MHz G.Skill RAM 16GB (2x8GB)
MSI 980 Ti
750W Supernova G2.

 

[KKAW]

I reinstalled my CPU cooler entirely (and also redid my cable management) after I ran the test and my CPU throttled. I made sure to use a very small amount of paste the second time. I was idling between 38-41C before, and now I'm idling between 35-38. Aida64's FPU test still causes throttling within seconds, though.

Is my CPU a dud?

4790K at 4.4GHz
Hyper 212 EVO
Maximus VII Hero
1867 MHz G.Skill RAM 16GB (2x8GB)
MSI 980 Ti
750W Supernova G2.

Look at the monitor tab and it will show you the temperatures. Check if you are thermal throttling because you should not be throttling from your PSU.

Also when you overclocked did you make sure your CPU Vcore voltage and Input voltage are fixed and not too high.

Higher Voltage = More Heat = Thermal throrling.

4.4 Ghz should be easily reachable on 1.25V especially with the outstanding quality motherboard you have.
Unless your cooler is not mounted correctly 1.25V should be barely producing any heat.

 

[Halcyon Genesis]

I reinstalled my CPU cooler entirely (and also redid my cable management) after I ran the test and my CPU throttled. I made sure to use a very small amount of paste the second time. I was idling between 38-41C before, and now I'm idling between 35-38. Aida64's FPU test still causes throttling within seconds, though.

Is my CPU a dud?

4790K at 4.4GHz
Hyper 212 EVO
Maximus VII Hero
1867 MHz G.Skill RAM 16GB (2x8GB)
MSI 980 Ti
750W Supernova G2.

Look at the monitor tab and it will show you the temperatures. Check if you are thermal throttling because you should not be throttling from your PSU.

Also when you overclocked did you make sure your CPU Vcore voltage and Input voltage are fixed and not too high.

Higher Voltage = More Heat = Thermal throrling.

4.4 Ghz should be easily reachable on 1.25V especially with the outstanding quality motherboard you have.
Unless your cooler is not mounted correctly 1.25V should be barely producing any heat.

The overclock is simply the motherboard putting the CPU into turbo mode automatically. This is the out-of-the-box setting for the motherboard. I would have to change a setting to get the base clock.

It's thermal throttling. Voltages are fine. Here's some pictures.

http://postimg.org/gallery/20zpvvycw/

It's worth noting that while gaming, my CPU temperatures never typically go higher than the mid 60s. I was playing TW3 for a little while at 1080p, unlocked frame rate, all settings ultra, all post processing on, hairworks off, and I don't think my CPU ever went above 67C.

FPU stress testing causes all my core temperatures to jump up into the high 80s and 90s within a few seconds.

 

[KKAW]

I reinstalled my CPU cooler entirely (and also redid my cable management) after I ran the test and my CPU throttled. I made sure to use a very small amount of paste the second time. I was idling between 38-41C before, and now I'm idling between 35-38. Aida64's FPU test still causes throttling within seconds, though.

Is my CPU a dud?

4790K at 4.4GHz
Hyper 212 EVO
Maximus VII Hero
1867 MHz G.Skill RAM 16GB (2x8GB)
MSI 980 Ti
750W Supernova G2.

Look at the monitor tab and it will show you the temperatures. Check if you are thermal throttling because you should not be throttling from your PSU.

Also when you overclocked did you make sure your CPU Vcore voltage and Input voltage are fixed and not too high.

Higher Voltage = More Heat = Thermal throrling.

4.4 Ghz should be easily reachable on 1.25V especially with the outstanding quality motherboard you have.
Unless your cooler is not mounted correctly 1.25V should be barely producing any heat.

The overclock is simply the motherboard putting the CPU into turbo mode automatically. This is the out-of-the-box setting for the motherboard. I would have to change a setting to get the base clock.

It's thermal throttling. Voltages are fine. Here's some pictures.

http://postimg.org/gallery/20zpvvycw/

It's worth noting that while gaming, my CPU temperatures never typically go higher than the mid 60s. I was playing TW3 for a little while at 1080p, unlocked frame rate, all settings ultra, all post processing on, hairworks off, and I don't think my CPU ever went above 67C.

FPU stress testing causes all my core temperatures to jump up into the high 80s and 90s within a few seconds.

You will have to manually fix the voltages. If the motherboard is automatically adding more voltage, it is adding way too much voltages to make sure it is stable. Even on FPU stress testing my i5 4690K on 4.6 ~ 4.7 Ghz only goes up to 80 C max with a Hyper 212 X Turbo Dual Fan.

 

[Halcyon Genesis]

You will have to manually fix the voltages. If the motherboard is automatically adding more voltage, it is adding way too much voltages to make sure it is stable. Even on FPU stress testing my i5 4690K on 4.6 ~ 4.7 Ghz only goes up to 80 C max with a Hyper 212 X Turbo Dual Fan.

The voltage never goes super high, though. 1.273v was the peak. It was usually around 1.25v while being stressed.

I'll manually change it and report back regardless.

 

[Halcyon Genesis]

Ok, so I manually set the voltage to 1.2v at 4.4 GHz. Load temperatures were a bit better, but the FPU test still caused thermal throttling. It took over a minute, and it was by a max of 3%, so lowering the voltage definitely helped, but there is definitely a problem.

http://postimg.org/gallery/1kv5u9u9m/

 

[LookItsRain]

FPU stress testing produces unrealistic tempatures, if its below 70c during heavy gaming your fine.

 

[Halcyon Genesis]

FPU stress testing produces unrealistic tempatures, if its below 70c during heavy gaming your fine.

I know FPU stressing causes unrealistically high temperatures, that's the entire reason I used it. I wasn't expecting low temperatures during the test, but the CPU shouldn't be throttling at stock turbo mode at 1.2V. Plenty of people run higher overclocks at higher voltages with the same cooler and don't throttle.

I paid over $400 CAD after tax for this processor. I don't want a dud.

I have a better cpu cooler on the way, a Noctua D15. This will rule out the CPU cooler as a culprit. If my CPU can't handle a modest overclock above 4.4 GHz under or at 1.25v, I'm RMAing it. I probably won't use an overclock over 4.4 GHz for years to come as it's not needed, but I intend to get what I paid for. I bought this processor because it's relatively future-proof when it isn't defective.