prime95 at 4.4 ghz on an i7 6700k with overclocking
prime95 at 4.4 ghz on an i7 6700k with overclocking
After performing small FFT tests in Prime95 at 4.4 GHz with 1.33 volts, I encountered a freeze. Values below 1.32 volts also failed. It seems 1.33 V is quite high for that clock speed. Should I try another frequency or settle for 4.3? Are there other adjustments beyond core clock and voltage that could help resolve this issue? Thanks.
PS: My temperatures during the test were between 65-75°C, so hardware limits might be the main concern.
i7-6700k, MSI z170-g45 gaming (mobo), EVGA Geforce Gtx 970 SSC ATX 2.0, Theraltake Versa N21 (case), GeIL Evo Potenza 3000 mhz DDR4 (currently at 2600 mhz, RAM), Corsair h55(cooler) with noctua nf-f12, Samsung 850 Evo 250 gb, Seagate 1 TB hdd, ThermalTake SmartM Series 850W (PSU).
I'm uncertain if it's worth mentioning that one of the motherboard temperature readings was also in the 75s. The freeze and/or crashes I experienced for prime95 were almost instant after starting the FFT test (@4.4 ghz).
I no longer consider Prime95 important for modern CPUs or application reliability after Sandy Bridge. It really depends on whether you're using the older P95 or the newer version. When AVX is available, the voltage you configure will increase by about 0.13 volts or more. Running tests with the outdated non-AVX versions isn't very helpful since passing them only confirms stability—unless you utilize any of the CPU's newer capabilities. In such cases, a P95 stable OC might fail during a multitasking benchmark like RoG Real Bench. I recommend these steps:
1. Run RoG Real Bench and monitor voltage/temperature with HWinFO64 (sensors only).
2. Restore BIOS to default settings, raise VCCin up to 1.9 before applying CPU multipliers and voltage changes.
3. Keep memory settings at the standard JEDEC configuration.
Tradesman1 :
Do you have the latest BIOS? If a newer available it might help, otherwise it may be youdon't have a real strong 6700K
Wow. I actually have really old drivers installed. I can't believe I overlooked this. Thanks, I will try these new ones out and see what happens
JackNaylorPE shared his experience on why Prime95 became less relevant after Sandy Bridge. He emphasized that stability depends on whether you're using the older P95 or newer models. With AVX enabled, voltage changes of 0.13 volts or more occur. Running tests on non-AVX versions is unreliable since passing them doesn't guarantee real-world stability, especially with multitasking benchmarks like RoG Real Bench. He recommends specific steps: use RoG Real Bench with HWinFO64 for monitoring, reset BIOS settings to defaults, and adjust VCCin up to 1.9 before applying CPU multipliers and voltage tweaks. Keep memory at default JEDEC settings. He plans to try these changes if BIOS updates and driver installations don't resolve the issue. Thanks.
The 6th core is experiencing an issue with prime95 using AVX2, and updating the BIOS might resolve the problem.
well, bios + driver update allowed me to finally use XMP profile, which wasn't working before, and allowed me to boot into gaming boost, which I won't use though
I tried 4.4 with 2133 mhz ddr4 speed on ROG and prime and still crashed for both
I can't find this VCCin voltage in BIOS? Perhaps this is callled something else for skylake?