Help i5 8600k
Help i5 8600k
Hey everyone, I've been checking out the OC forums and was wondering if this is okay.
MSI Z370 PC PRO
I5 8600K
RAM X2 8GB CORSAIR VENGENCE
PSU COOLER MASTER 600LITE
COOLER COOLER MASTER 240LITE
Just new to the OC scene, honestly—I've been reading and experimenting without wanting to go overboard. I upgraded my i5 8600K to a modest 4.5GHz, which is still not its full potential. I started to get concerned when running Prime and it kept at a steady 71°C.
I changed the BIOS settings to run at 45 (4500MHz) and adjusted the settings so all cores are disabled, turning off the boosting feature. Everything else is set to auto. I followed a previous post suggesting 5GHz, but I know not every chip is that flexible. My CPU claims a TDP of 94/95.
Anyone have any advice or suggestions on how to lower the temperature better? Thanks in advance!
OCD Tweaker:
what tools are you using to keep your CPU cool? usually, for overclocking you'll need an aftermarket CPU fan or a closed-loop water cooler. Personally, I don't like my temps going above 70°C—others let their CPU reach 80°C. I'm using a Master 240lite cooler on the CPU with four 140mm fans: three intake fans at the front and one at the back.
70 degrees at 4.5GHz is suitable and there are no problems with Prime95. If you were using a different version than 26.6, your temperatures would be excellent since 26.6 doesn’t put much strain on the CPU through AVX. You can increase the frequency but you may need to adjust the vcore voltage, which could slightly lower the temps. I achieved 4.8GHZ at 1.295v and it was fine at about 68 degrees with a 360 AIO. My current 8700K runs at 4.9 GHz at 1.325vcore. I’m using an ofset in the BIOS, but I’m not sure how it functions on MSI boards—check the documentation for MSI’s ofset mode since I’m using a Gigabyte motherboard.
vMax performance at 70 degrees at 4.5GHz seems acceptable with Prime95. If you weren't using version 26.6, your temperatures are excellent since AVX doesn't strain the CPU much. You can increase the frequency but may need to adjust the vcore voltage, which could slightly lower the temps. I achieved 4.8GHZ at 1.295v and it was fine around 68 degrees with a 360 AIO. My current 8700K runs at 4.9 GHz at 1.325vcore using an ofset in BIOS. I'm unsure about the ofset mode on MSI boards since I'm using a Gigabyte motherboard—check the documentation for that. I've experimented with 4.8 and an avx offset of -3; without it, I reached 87 degrees at 1.295vcore and set vll mode to 4 for linear performance. With Prime version 27, AVX is enabled and doesn't significantly raise temps. Should my TDP be close to 130 watts? The CPU tester shows a 95 TDP, or is that just the chipset's behavior?
Monkeyballz1985 shared their experience with different Prime95 versions. They noted that 70 degrees at 4.5GHz works well and no problems were encountered. Using a version other than 26.6 seemed fine, as 26.6 didn’t strain the CPU with AVX support. Going higher was possible but would require adjusting the vcore voltage, which could lower temperatures slightly. They mentioned achieving 4.8GHz at 1.295v and experienced around 68 degrees Celsius while running a 360AIO. Their current 8700K was at 4.9GHz with a 1.325vcore, using an ofset in BIOS. They were unsure about the ofset mode on MSI boards but planned to research it further. They also tried 4.8GHz with an AVX offset of -3 and found that dropping to -2 improved temperatures without affecting performance. They questioned whether their current TDP (95) was sufficient or if it was just a natural limit, noting that their CPUID listed 130W but they felt 1.3V was close to their personal max. They advised focusing on temperature and voltage stability rather than just TDP.
The optimal setting is around 70 degrees at 4.5GHz, and Prime95 performed well without problems. Using a different version than 26.6 seems fine, as it doesn’t strain the CPU with AVX. You can increase the frequency but may need to adjust the vcore voltage slightly. I achieved 4.8GHZ at 1.295v, which was acceptable at about 68 degrees despite running a 360AIO. My current 8700K runs at 4.9GHz with a 1.325vcore—using an offset in BIOS. I’m unsure how the offset works on MSI boards since I’m using a Gigabyte motherboard, so I should check the documentation for that specific model.
I’ve experimented and found a stable configuration at 4.8GHz with an AVX offset of -3. Removing the offset and switching to VLL mode 4 gave me a higher temperature of 87 degrees while maintaining good performance. With Prime version 27, AVX is enabled and doesn’t significantly raise temperatures. I’m concerned about whether my TDP is close to 130W or if the CPU’s thermal design power rating is accurate. The CPUID shows a 95W TDP, but I’m not sure if that reflects actual usage or just the standard.
I meant the offset in relation to vcore and adaptive voltage control—voltage drops when idle and peaks at 1.325V under load. It’s not a problem, as your current setup with 4.8GHz at 1.295v is solid. Reducing AVX offset to -2 shouldn’t affect temperatures much. Your temps are within acceptable ranges, especially since I rarely stream or edit during gaming sessions. The temperatures stay around 57-68 degrees, which is good for daily use.
Your configuration appears fine and you don't have to turn off C states...keep it active. The temperatures are excellent too, with 50 to 60 degrees during gaming being ideal...Wishing you success on your overclocking path.
Your configuration seems fine and you shouldn’t disable C states... keep them enabled. The temperatures are excellent too, especially around 50 to 60 degrees during games – that’s great. Good luck with your overclocking efforts. Thanks for using prime95; it helped me avoid hitting 90c by adjusting the settings. I explored avx and found it mainly relevant for video editing and rendering, not gaming. Should I stick with Prime95 version 26.6 for a more accurate gaming representation? Without avx, I’d prefer to aim for around 5ghz. Thank you!
For Intel the Prime95 version 26.6 is suggested and provides a reasonable estimate of temperatures during high demand...