wolfriderscrew,
On behalf of Tom's Moderator Team, welcome aboard!
If you'd like to know what the above Core temperature scale is based on, then read our Guide. Incidentally, you didn't mention ambient temperature, which can be a
huge variable. Just so we don't proceed on false assumptions, ambient temperature should always be stated right up front. Core temperatures increase and decrease with ambient temperature. Since users write to us from all corners of the planet, is it 10°C or 40°C where you live? Standard or "normal" room temperature is 22°C or 72°F.
terry4536,
Respectfully, as you made no mention of the thermal or workload differences between Prime95
VERSION 26.6 and later
versions, then perhaps you're not yet aware that the workload issue with Prime95 is strictly
version specific, which is well known. See the
***Note*** below. Contrary to your blanket statement concerning Prime95,
version 26.6 Small FFT's is the best test to validate thermal performance. This has been meticulously researched, tested and proven.
Not all loads are created equal. “Stress” tests can be characterized into two categories;
stability tests which are
fluctuating workloads, and
thermal tests which are
steady workloads. Intel tests their processors at a
steady 100% TDP workload to validate Thermal Specifications.
Prime95 version 26.6 Small FFT's is ideal for CPU thermal testing, because it's a
steady 100% workload with
steady Core temperatures, which allows accurate measurements of Core temperatures, and typically runs Core i variants with Hyperthreading and Core 2 processors within +/- a few % of TDP.
A steady 100% workload is key for thermal testing so the CPU, cooler, socket, motherboard and voltage regulators can thermally stabilize. No other utility more closely replicates Intel's test conditions than P95 v26.6 Small FFT's.
Utilities that don't
overload or
underload your processor will give you a valid thermal baseline. Here’s a comparison of utilities grouped as
thermal and
stability tests according to % of TDP, averaged across six processor Generations at stock settings rounded to the nearest 5%:
Higher TDP tests produce higher Core temperatures. All tests will show 100% CPU
Utilization in Windows Task Manager, which indicates processor resource activity,
not % TDP
workload. Although actual Power dissipation (Watts) varies with Core Speed, Core voltage and workload, Prime95 v26.6 Small FFT’s always provides a steady 100% workload, whether you’re running stock or overlocked.
***Note*** 2nd through 8th Generation i3, i5 and i7 CPU's have AVX (Advanced Vector Extension) Instruction Sets. Prime95 versions
later than 26.6 run AVX code on the CPU's Floating Point Unit (FPU) which causes
unrealistic temperatures
up to 20°C higher due to an excessively high TDP workload, as shown above. Other high TDP utilities have similar results.
AVX can be
disabled in Prime95 versions later than 26.6 by inserting "CpuSupportsAVX=0" into the "local.txt" file in Prime95's folder. However, since Core temperatures will be the same as 26.6, it's easier to just use 26.6. AVX doesn't affect Core i 1st Generation, Core 2, Pentium or Celeron processors since they don't have AVX Instruction Sets.
If you’re overclocked and run AVX apps such as for rendering or transcoding, you may need to reduce Vcore and Core speed or upgrade your cooler and case fans so Core temperatures don’t reach 85°C. Many 6th, 7th and 8th Generation motherboards address the AVX problem by providing offset adjustments in BIOS. An offset of -2 (200 MHz) is usually sufficient.
wolfriderscrew,
There's no mention of
WHICH of the
15 possible tests involving the CPU was used in AIDA64; any will give different thermal results:
(1) CPU
(2) FPU
(3) Cache
(4) RAM
(5) CPU, FPU
(6) CPU, Cache
(7) CPU, RAM
(8) FPU, Cache
(9) FPU, RAM
(10) Cache, RAM
(11) CPU, FPU, Cache
(12) CPU, FPU, RAM
(13) CPU, Cache, RAM
(14) FPU, Cache, RAM
(15) CPU, FPU, Cache, RAM
That's a lot of variables.
Guys,
This is a complex topic that's poorly understood by the vast majority of users, so when discussing environmental, hardware and software variables and test methods, it's crucial to
be very specific. The only way to make sense of the topic is to reduce it to the lowest common denominator by minimizing or eliminating as many variables as possible. This allows apples-to-apples comparisons where results are always consistent and repeatable.
For everyone's benefit,
volkgren was thoughtful enough to provide a link to our Guide, which among many other items, explains how to correctly perform a thermal test to establish a valid baseline. It's a Sticky near the top of our CPU's Forum, but here it is again:
Intel Temperature Guide -
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html
Keep in mind there's an overwhelming amount of misinformation everywhere on the Internet concerning this topic, so if you'd like to get yourselves up to speed, then just read our Guide.
wolfriderscrew,
Once again, welcome aboard!
CT