CPU usage 100%/spikes

CallMePuff

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Jan 17, 2014
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During or loading up a game my CPU usage can go up to 100% and stay at around 85 to 100.

The problem is that during a game it will lag really badly even in games that my system can very easily handle like League of legends and CS GO (even singleplayer games so not a connection problem). They all seem to lag in same way in the same bursts.
I think this happens when the CPU goes near 100%

looking at the CPU temps it almost never even gets to 50 degrees (62 max) so I don't think its a cooling problem.

Ive ran a bunch of anti-virus and anti-malware and come up with nothing.

Using an i5 4670k and a 280x GPU (not sure if relevant)
 


i7Baby,

The monitoring utilities provided by motherboard manufacturers on their Driver DVD reads CPU temperature, NOT Core temperature. Core temperature is 5C higher than CPU temperature due to sensor location.

A single analog sensor located under the Cores measures "CPU" temperature, which is the overall temperature of the entire processor. The Analog value is converted to Digital (A to D) by the Super I/O (Input / Output) chip on the motherboard, then is calibrated to look-up tables coded into BIOS for each socket-compatible processor.

Thermal code can vary greatly between BIOS suppliers and version updates, and can be wrong by up to 30C. BIOS or CPU temperature may not be accurate.

Unlike CPU temperature, Core temperatures are measured directly on the hot spots within each Core by individual Digital Therermal Sensors (DTS) which are factory calibrated by Intel, and function independently of BIOS.

Core temperature is the standard for thermal measurement because it's consistently more accurate than CPU temperature.

CallMePuff,

Use Real Temp to measure your Core temperatures, as it was designed specifically for Intel processors: Real Temp - http://www.techpowerup.com/downloads/2089/real-temp-3-70/

Also, please read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Thanks,

CT :sol:
 
The vast majority of threads which mention processor temperatures use monitoring utilities that measure Core temperatures. Users predominantly express their temperatures in these terms.

Moreover, the reviewers and writers at enthusiast websites such as Tom's, as well as many others all use Core temperatures to express processor temperatures.

CT :sol:
 
Thanks, that's a good overclocking article. I remember reading it last July shortly after it was published, and have since read it again.

The reviewer was using the ASUS OC utility to illustrate it's automatic overclocking features.

The "Results" shown in the 4790K and 4690K tables are using temperatures from OCCT. The "Monitoring" tab in OCCT measures the available temperature sensors, including Core temperatures.

Although the reviewer did not specify, it's normal procedure to perform testing at standard ambient temperature, and to record the temperature of the highest Core.

CT :sol:
 
Yes, but you understand that when I'm not wearing my Moderator's hat, my work here at Tom's is dedicated to the topic of processor temperatures.

Over the past 8 years I've read and studied hundreds of pages of Intel's documents in an ongoing effort to help others make sense of their processor temperatures. Since 2007 I've invested over 3,000 hours of research, hands on testing, composition and editing for several versions of my Intel Temperature Guide. As such, I take my work very seriously, and I've done my homework.

Unfortunately, Intel's Thermal Specifications as a whole are fragmented, poorly written and misleading. The Thermal Specifications should be written to clearly show the relationship between CPU temperature and Core temperature, but they don't. This information can only found in a few engineering documents.

It's not common knowledge that Core temperature is 5C higher than CPU temperature due to sensor location, so everyone naturally takes Tcase at face value. Most people also don't that Tcase is not Core temperature, but they assume it is, then use "CPU" or "Core"as interchangeable terms without distinction.

Whatever the Tcase spec is for a given processor, the corresponding Core temperature is 5C higher. For example, Tcase for the popular i5 4690K is 72C. Tcase + 5 makes the corresponding Core temperature 77C.

Please take some time to carefully read my Temperature Guide. It will give you a much better understanding of Intel's processor temperatures.

Thanks,

CT :sol:
 
Apologies to the OP for side-tracking your thread.

Yes - if asked for the core temp on a cpu, I'd just add 5 to 10c to the cpu/case/package temp.

But from what I've seen so far, OPs are mostly using CPU temps.
I do ask if its unclear. Anyway, I'll cut it short here. Its unfair to the OP.
 


The offset is 5C, not 10C, and "Package" temp is the hottest Core..



This is largely due to the fact that most people don't distinguish between "CPU" and "Core" as individual terms which are not interchangeable.

CallMePuff,

My apologies as well for diverting your thread, however, I'm sure all readers have found these posts to be informative and useful.

CT :sol: