Supahos :
CT with 700mm worth of custom loop and stock speeds should it matter even if it's avx loaded as heck? Something is wrong or it would stay within thermal.limits
Supahos,
That's actually 600mm of cooling field, but yes you're right; there could be a more basic cooling problem. Nevertheless, the Prime95 version definitely matters.
For example, ambient temperature becomes a huge variable when users don't tell us they live on the Equator at 40°C without air conditioning. If no one asks, we proceed on false assumptions.
While non-AVX version 26.6 is a true 100% workload, later versions such as 27.7 through 29.4 will
overload any processor with AVX2 Instruction Sets to nearly 130%, which imposes a
brutal workload beyond any other test utility. Moreover, users have reported abnormally high "Auto" or "Adaptive" Vcore that was corrected with a BIOS flash. High Vcore combined with AVX can increase power consumption by over 25%, which in turn can increase Core temperatures by an unrealistic 20°C higher than version 26.6.
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. No other utility so closely replicates Intel's workload test conditions.
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 tests (steady workloads) and
stability tests (fluctuating workloads) according to % of TDP, averaged across six processor Generations at stock settings rounded to the nearest 5%:
All tests will show 100% CPU
Utilization in Windows Task Manager, which indicates processor resource activity,
not % TDP
workload. Core temperatures respond directly to Power dissipation (Watts), which is driven by workload. Prime95 v26.6 Small FFT’s provides a true and steady 100% workload, so if Core temperatures are below 85°C, then your processor should run the most demanding
real-world workloads without overheating.
Any post that mentions testing with "Prime95" but doesn't specify which
version, automatically needs to be verified so we don't overlook the obvious. Prime95 version, as well as ambient temperature, are high profile variables that always need to be included on the checklist as a matter of troubleshooting protocol. It also needs to be established whether the user is running an AVX offset with a later version of Prime95.
Since there's so many hardware, software and environmental variables involved, it's important to eliminate the more common possibilities right up front in order to simplify troubleshooting so we aren't misled.
Another factor to consider is thermal dissipation. Although the 9600K has a soldered IHS, 9th Gen is nowhere near as efficient as 2nd Gen Sandy Bridge and earlier soldered processors. The 9600K still runs hot due to Intel's increased thicknesses of the 9th Gen Die and the solder. Delidding the 9600K only drops Core temperatures by about 6°C. The 8600K is essentially identical but runs hotter as it's not soldered. Delidding the 8600K typically drops Core temperatures about 20°C. Here's how they compare:
8600K Stock - Hotter
9600K Stock - Hot
9600K Delid - Warmer
8600K Delid - Warm
Even though the 9600K is soldered, it's still a relatively hot processor.
CT
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