CPU Heats to 85C Instantly Then Stays There

[TTesla]

Running prime95 the CPU VERY quickly (1-2 seconds) reaches 75-80 C then slowly gets up to around 85C. Staying at 100% the whole time, and at full speed (ie no thermal throttling is happening). 

 

What is causing this? 

Perhaps too much thermal paste?

[Skiiwee29]

Thats normal with Prime95. As long as its not getting really any hotter, you're fine. 

[xg32]

1 minute ago, TeenTesla said:

Running prime95 the CPU VERY quickly (1-2 seconds) reaches 75-80 C then slowly gets up to around 85C. Staying at 100% the whole time, and at full speed (ie no thermal throttling is happening). 

 

What is causing this? 

Perhaps too much thermal paste?

full specs? are u running blend or fft

[SidM]

what CPU and cooler r u using. btw you can never have too much thermal paste. 85 is good for prime95 when overclocked.

[TTesla]

11 minutes ago, SidM said:

what CPU and cooler r u using. btw you can never have too much thermal paste. 85 is good for prime95 when overclocked.

 

12 minutes ago, xg32 said:

full specs? are u running blend or fft

 

12 minutes ago, Skiiwee29 said:

Thats normal with Prime95. As long as its not getting really any hotter, you're fine. 

OCing an older i5-4670k (4 cores, 4 threads), bumped VCORE to 1.24 V, and base clock to 4 GHz on a hyper 212 evo. Not my main rig, but just put the 212 evo on today, and felt a bit too generous with the tim, but I did double check to make sure none leaked.

 

It just seemed surprising that the CPU would get that hot that quick, almost like it was thermally insulated from the cooler (which is why I thought maybe too much TIM). 

 

Prime95 was set to fft, for that max heat.

[Swarlos]

2 minutes ago, TeenTesla said:

 

 

OCing an older i5-4670k (4 cores, 4 threads), bumped VCORE to 1.24 V, and base clock to 4 GHz on a hyper 212 evo. Not my main rig, but just put the 212 evo on today, and felt a bit too generous with the tim, but I did double check to make sure none leaked.

 

It just seemed surprising that the CPU would get that hot that quick, almost like it was thermally insulated from the cooler (which is why I thought maybe too much TIM). 

There was a video earlier this year from Gamer's Nexus tackling the notion of "too much thermal paste."  It doesn't make that much difference how much you put on as long as everything is covered.

 

 

[Enderman]

That's how computers work...

It is normal.

 

[xg32]

8 minutes ago, TeenTesla said:

.

-corrected-

[TTesla]

1 minute ago, Swarlos said:

There was a video earlier this year from Gamer's Nexus tackling the notion of "too much thermal paste."  It doesn't make that much difference how much you put on as long as everything is covered.

 

 

You know I watched that, and even liked the video, can't believe I forgot this quickly...

[Skiiwee29]

2 minutes ago, xg32 said:

i had to check since it's been awhile, it's normal for it to heat up fast, but the TJmax for the 4670k is 73C, so make sure you aren't heating up to 85C in regular usage.

TJ Maxx is 105c, not 73c. 

[TTesla]

2 minutes ago, Enderman said:

That's how computers work...

It is normal.

 

Been a while since I've done this, suppose I just forgot. Thanks for the heads up