For the i5 4670K, you should use the 95th prime version.
For the i5 4670K, you should use the 95th prime version.
Title. I'm currently working on overclocking my i5 4670k and experience varying outcomes depending on the P95 version used for testing. I aim to base my decisions on the optimal setting, which I think is 26.6, though I value advice from more experienced users.
My CPU package temperature reaches 90°C+ with the latest P95 version, whereas "TMPIN2" in HWMonitor (possibly northbridge) shows 100°C.
With version 26.6, my CPU package stays under 62°C, and "TMPIN2" no longer exceeds 50°C.
I’m considering sticking with the 26.6 results as I continue to overclock while keeping an eye on temperatures during other applications, such as AIDA64.
Opinions?
On behalf of Tom's Moderator Team, we are pleased to have you join us! At the forefront of our Forums are "Stickies" – informative threads that remain permanently in place for easy access as helpful references. Near the top of our CPUs Forum, you'll find this Sticky: • Intel Temperature Guide - Read it carefully. The guide notes: "... Intel evaluates their processors in controlled settings at full TDP. Prime95 version 26.6 Small FFT's is recommended for CPU thermal testing, as it provides a consistent 100% workload with stable core temperatures that typically support Core i..."
It is recommended to choose the most recent version, as it includes bug fixes from earlier releases. However, you should still review this passage.
The team of Tom's Moderator Team extends its warmest welcome! On the forefront of our Forums are "Stickies" – informative threads that remain permanently available for quick reference. At the top of our CPUs Forum, you’ll find this helpful resource: • Intel Temperature Guide - Read it at your own pace. The guide explains: "... Intel evaluates their processors under precisely controlled settings at full TDP. Prime95 version 26.6 is recommended for CPU thermal testing, as it delivers a consistent 100% workload with stable core temperatures. This typically matches the performance of Core i variants with Hyperthreading and standard CPUs within a few percentage points of TDP. It’s also the tool Real Temp employs to verify Core temperature sensors. • Prime95 v26.6 - http://www.mersenneforum.org/showthread.php?t=15504 Note: Avoid using Prime95 versions beyond 26.6 on CPUs from the 2nd through 8th generation i3, i5, or i7, as these support AVX instruction sets. Versions after 26.6 execute AVX code on the CPU’s floating-point unit, leading to temperatures up to 20°C higher than expected. AIDA64’s FPU tests confirm this effect. You can disable AVX in Prime95 by adding “CpuSupportsAVX=0” to the local.txt file. However, since core temperatures remain consistent with 26.6, sticking with the original version is simpler. AVX doesn’t impact older models like Core i1st Gen, Core 2, Pentium, or Celeron.... If you’re overclocked and using AVX-intensive tasks such as rendering or transcoding, consider lowering Vcore and core speeds, upgrading your cooling solution, or enhancing case fans to prevent temperatures from exceeding 85°C. Many 6th, 7th, and 8th Gen boards resolve this via BIOS offset adjustments (e.g., -2 or -3 at 200/300 MHz). Asus RealBench runs a realistic AVX workload with only minor TDP deviations, making it ideal for assessing overall system stability—regardless of overclock status... • Asus RealBench - http://rog.asus.com/rog-pro/realbench-v2-leaderboard/" Intel also provides guidance: Troubleshooting Intel® Core™ i7-4790K / i5-4690K overheating - https://communities.intel.com/docs/DOC-23517 And a discussion on i7 4790K core temperatures and overclocking - https://www.youtube.com/watch?v=BGTnJkuqlbo Once more, we are pleased to have you join the community!