Are these temps normal?

[Sanjoro]

Hey guys first post, I bought a Cyberpowerpc almost a year ago (couldnt build one for the price at the time) it has a water cooled i7 9700k with a 120mm radiator, ive been doing research into overclocking to 5ghz (never done it before) and one of the guys i watched used a program called prime95 to check temps so just for fun i ran prime95 also to check my stock temps and all cores go from 34C to 80C in less than a second, could the water block not be seated on the cpu properly?

 

i also moved the fans and radiator to locations that seemed better? the fan on the radiator is a coolermaster masterfan120AB, cant find any specs on it but it definitely doesnt move much air

[Helpful Tech Witch]

that's pretty normal for a 120mm aio. And prime95 hits HARD on the CPU.

[Sanjoro]

that sucks, it just seemed weird that I wouldnt have more than a second of thermal mass 

[LIGISTX]

3 minutes ago, Sanjoro said:

that sucks, it just seemed weird that I wouldnt have more than a second of thermal mass 

It has nothing to do with the thermal mass of the cooling solution. P95 pumps soo much wattage through the chip it can’t get out of the die itself. The heat just can’t move through the silicon die, into the IHS, and out to the water block fast enough. It’s normal for p95 to cause this. 

[Sanjoro]

would a 5ghz overclock be unreasonable for my setup?

 

would buying a better pump/cooling block lower these temps?

[RAS_3885]

32 minutes ago, Sanjoro said:

would a 5ghz overclock be unreasonable for my setup?

 

would buying a better pump/cooling block lower these temps?

Getting 5 GHz stable will depend on the silicon lottery for your chip, your motherboard's power delivery (VRM) layout and quality, and cooling solution.

 

If you're not currently CPU limited in the games/applications you use I would not bother with overclocking.

 

80C in Prime95 is not really that bad, however, for water cooling you need to let stress tests run for a sufficient amount of time for the loop to hit a thermal equilibrium before you can say for sure if it's sufficient. Usually that 10-20 minutes for a smaller loop. I doubt a 120mm rad would be enough for 5 GHz stable unless you were REALLY lucky with your chip and can get away with low voltage numbers.

[LogicalDrm]

On 3/12/2021 at 9:43 PM, Sanjoro said:

that sucks, it just seemed weird that I wouldnt have more than a second of thermal mass 

Unreasonable? The sensor is not on top of IHS where the cooler is, the temps are the actual core temps. The headroom doesn't mean how long it takes for CPU to reach max temp (which with stress test is 5-15mins), but how long it is from the max temp to max safe/comfortable.

 

As for OC, I assume you are running all stock now. You can probably drop the temps already by switching to adaptive or manual voltages. So you can probably OC. How much depends on how good chip you have.

[Sanjoro]

On 3/13/2021 at 4:12 PM, LogicalDrm said:

Unreasonable? The sensor is not on top of IHS where the cooler is, the temps are the actual core temps. The headroom doesn't mean how long it takes for CPU to reach max temp (which with stress test is 5-15mins), but how long it is from the max temp to max safe/comfortable.

 

As for OC, I assume you are running all stock now. You can probably drop the temps already by switching to adaptive or manual voltages. So you can probably OC. How much depends on how good chip you have.

ah, that makes sense. I thinking about replacing the radiator with a 360mm and the thermal compound since this PC was a cheap prebuild i dont know if any errors were made when installing the cooler